Highly active catalytic material for NH 3 conversion and preparation thereof by one-step impregnation

Abstract

The present invention relates to a process for preparing a catalytic material, the process comprising (i) molding a mixture comprising one or more sources for a support material; (ii) calcining the molding obtained from (i) in a gas atmosphere, obtaining a molding comprising a support material; (iii) impregnating the molding with an aqueous solution comprising both a source of Ru and a source of an alkali metal such as potassium acetate. Further, the present invention relates to a catalytic material obtained or obtainable by said process and use thereof. Yet further, the present invention relates to a process for converting NH3 to H2 and N2 using said catalytic material.

Description

Highly active catalytic material for NH3 conversion and preparation thereof by one-step impregnationTECHNICAL FIELDThe present invention relates to a process for preparing a catalytic material particularly comprising Ru and an alkali metal supported on a support material, a catalytic material obtainable and / or obtained by said process as well as use thereof. In addition thereto, the present invention relates to a process for converting NH3 to H2 and N2 using said catalytic material.INTRODUCTIONNH3 is seen as an energy vector of the future, able to store chemically significant amounts of H2. So, sustainable NH3 might be produced on a large scale from regenerative energy sources. The reforming of NH3 (see equation 1 below) on site, where the H2 is needed, might be the last step in closing an H2 value chain based on renewable electricity.(1) 2 NH3N2+ 3 H2For enhancing the decomposition of ammonia to nitrogen and hydrogen, the use of supported Ru catalysts have been discussed. Thus, by way of example, K. Lamb et. al. in Int. J. of Hydrogen Energy 2019, 44, 3726-3736 studies the kinetics of ammonia decomposition over LiOH-pro- moted RU / AI2O3. A. Di Carlo et al. in Int. J. of Hydrogen Energy 2014, 39, 808-814, on the other hand, studies ammonia decomposition over a commercial RU / AI2O3 catalyst at different operative pressures and temperatures, wherein it is noted that greater dissociation rates are achieved at lower pressures.T.A. Le et al. in Korean J. Chem. Eng. 2021 , 38(6), 1087-1103 discusses developments of ruthenium and nickel catalysts for COx-free H2 generation by ammonia decomposition. Said document however indicates that alkaline earth metal oxide supports and in particular basic supports such as MgO or neutral supports such as carbon nanotubes would provide better results than amphoteric supports such as C^Ch and TiC>2 or acidic supports such a AI2O3, ZrC>2, or SiC>2.M. Miyamoto et al. in Int. J. of Hydrogen Energy 2018, 43, 730-738 relates to the doping of ZrC>2 supports for increasing their basicity using La, and their use in reactions for the production ofhydrogen. Similarly, B. Lorenzut et al. in ChemCatChem 2010, 2, 1096 - 1106, discloses the use of lanthanum-stabilized zirconia, and indicates that basic oxides would be more efficient as supports for Ru catalysts as compared to acidic oxides. Z. Wang et al. in Int. J. of Hydrogen Energy 2019, 44, 7300-7307, for its part, relates to a Ba-modified ZrO2 support for Ru, and its use for ammonia decomposition.Ru supported on ZrC>2 has also found use as a catalyst in other reactions. Thus, WO 2015 / 086639 A2 relates to a Ru / ZrO2 catalyst applied in the hydrogenation of aromatic compounds whereas WO 2018 / 046393 A1 relates to a Ru / ZrO2 catalyst applied in the hydrogenation of nitriles.On the other hand, S.-F. Yin et al. in Applied Catalysis B Environmental 2004, 48, 237-241 relates to the use of carbon nanotubes (CNTs) as a support for Ru nanoparticles in the generation of hydrogen by ammonia decomposition, wherein the order of activities for different supports is indicated to rank as follows: Ru / CNTs > Ru / MgO > Ru / activated carbon > Ru / ZrO2 = RU / AI2O3.To have direct access to H2 at elevated pressure (10-50 bara), the NHs-reforming itself must however also be conducted at these pressures. Accordingly, there remains a need for an improved and cost-efficient process for NHs-reforming which allows for the direct provision of H2 under the conditions required for its further reaction.In this regard, S. Sayas et al. in Catal. Sci. Technol. 2020, 10, 5027-5035 studies high pressure ammonia decomposition on Ru-K / CaO catalysts at pressures of up to 40 bar. As for T.A. Le et al. in Korean J. Chem. Eng. 2021 , 38(6), 1087-1103, S. Sayas et al. teaches that the nature of the support would have been shown to strongly influence the catalytic performance of Ru-based catalysts, wherein among the use of basic supports like MgO and La2Os, neutral supports such as carbon nanotubes, and acidic supports such as AI2O3, the use of basic and neutral supports generally results in better catalytic properties. GB 1377191 A relates to cracking of ammonia to nitrogen and hydrogen, and discloses a catalyst comprising metallic cobalt or cobalt oxide or both supported on a mixed oxide having predominantly a spinel structure.There, however, remains the need for a novel catalytic material, in particular with respect to its activity in the conversion reaction of NH3 to N2 and H2. Further, there was a need for a process for preparing such a catalytic material, wherein the process is particularly efficient. In addition thereto, there remains a need for a process for NH3 conversion using said catalytic material.DETAILED DESCRIPTIONThus, it was a subject of the present invention to provide a process for preparing a novel catalytic material, in particular showing an improved activity in the NH3 reforming reaction for producing H2.Surprisingly, it has been found that a novel catalytic material can be prepared, wherein the catalytic material particularly comprise Ru and an alkali metal supported on a support material, and more particularly comprises a support material that has been subjected to an acid treatment. It has surprisingly been found that the novel catalytic material according to the present invention allows NH3 conversion at low temperatures, in particular when used in applications involving high pressure. Additionally, it has been found that the novel catalytic material prepared according to the present invention displays a high hydrothermal resistance, in particular when used under high pressure conditions, in view of water which may be present during the reaction, in particular in view of the small amounts which are present in industrial grade ammonia for its stabilization.Thus, the present invention relates to a catalytic material comprising a process for preparing a catalytic material, the process comprising(i) molding a mixture comprising one or more sources for a support material;(ii) calcining the molding obtained from (i) in a gas atmosphere, obtaining a molding comprising a support material;(iii) impregnating the molding with an aqueous solution comprising both a source of Ru and a source of an alkali metal.It is preferred that the one or more sources for a support material are selected from the group consisting of a source for M1O, a source for M22O3, a source for M3C>2, a source for M Os, and mixtures of two or more thereof, wherein the one or more sources for a support material are more preferably selected from the group consisting of a source for M1O, a source for M22O3, a source for M3C>2, and mixtures of two or more thereof, wherein the one or more sources for a support material are more preferably selected from the group consisting of a source for M1O, a source for M22O3, and mixtures of two or more thereof, wherein the one or more sources for a support material more preferably consist of a source for M1O and a source for M22O3, wherein the one or more sources for a support material more preferably consist of a source for M1O and M22O3, wherein M1stands for one or more divalent elements, M2stands for one or more trivalent elements, M3stands for one or more tetravalent elements, M4stands for one or more pentavalent elements.It is preferred that the one or more sources for a support material comprise, preferably consist of, one or more compounds selected from the group consisting of oxides, hydroxides, carbonates, nitrates, hydrogencarbonates, hydroxy carbonates, mixed metal oxides of M1and M2, mixed metal oxides of M1and M3, mixed metal oxides of M1and M4, mixed metal oxides of M2and M3, mixed metal oxides of M2and M4, mixed metal oxides of M3and M4, mixed metal hydroxy carbonates of M1and M2, mixed metal hydroxy carbonates of M1and M3, mixed metal hydroxy carbonates of M1and M4, mixed metal hydroxy carbonates of M2and M3, mixed metal hydroxy carbonates of M2and M4, mixed metal hydroxy carbonates of M3and M4, and mixtures of two or more thereof.It is preferred that the one or more sources for a support material comprise a source for M1O and a source for M22O3.In the case wherein the one or more sources for a support material comprise a source for M1O and a source for M22O3, it is preferred that the source for M1O and the source for M22O3 comprise, preferably consist of, one or more compounds selected from the group consisting of mixed metal oxides of M1and M2, mixed metal hydroxy carbonates of M1and M2, and mixtures thereof.Further in the case wherein the one or more sources for a support material comprise a source for M1O and a source for M22O3, it is preferred that the source for M1O and the source for M22O3 have a molar ratio of M1to M2in the range of from 1 :10 to 10:1.0, more preferably in the range of from 1 :2.5 to 2.5: 1 , more preferably in the range of from 1 :2 to 2: 1 , more preferably in the range of from 1 :2.1 to 1 :1.9.Further in the case wherein the one or more sources for a support material comprise a source for M1O and a source for M22O3, it is preferred that the source for M1O and the source for M22O3 comprise from 10 to 34 weight-%, more preferably from 25 to 31 weight-%, more preferably from 27 to 29 weight-%, of M1, calculated as M1O, based on the sum of the weights of M1, calculated as M1O, and M2, calculated as M22O3, comprised in the source for M1O and the source for M22C>3.Further in the case wherein the one or more sources for a support material comprise a source for M1O and a source for M22O3, it is preferred that the source for M1O and the source for M22O3 comprise from 66 to 90 weight-%, more preferably from 69 to 75 weight-%, more preferablyfrom 71 to 73 weight-%, of M2, calculated as M22O3, based on the sum of the weights of M1, calculated as M1O, and M2, calculated as M22O3, comprised in the source for M1O and the source for M22C>3.It is preferred that the support material is selected from the group consisting of M1O, M22O3, M3O2, M OS, M1M22C>4, and mixtures of two or more thereof, more preferably from the group consisting of M1O, M22O3, and M1M22C>4, wherein the support material more preferably is M1M22C>4, wherein M1stands for one or more divalent elements, M2stands for one or more triva- lent elements, M3stands for one or more tetravalent elements, M4stands for one or more pentavalent elements.It is preferred that M1is selected from groups 2, 10, 11 and 12 of the periodic table of elements, wherein M1is more preferably selected from the group consisting of Mg, Ca, Ni, Cu, Zn, Mn, Co, and mixtures of two or more thereof, more preferably selected from the group consisting of Mg, Ni, Cu, Zn, and mixtures of two or more thereof, more preferably from the group consisting of Mg, Zn, Cu, and mixtures thereof, more preferably from the group consisting of Mg, Zn, and mixtures thereof, wherein M1more preferably is Mg.It is preferred that M2is selected from groups 5, 6, 7, 8 and 13 of the periodic table of elements, wherein M2is more preferably selected from the group consisting of Al, Ga, In, Cr, Fe, V, Mn, Co, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, Cr, Fe, V, Mn, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, V, Mn, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, and mixtures of two or more thereof, wherein M2more preferably is Al.It is preferred that M3is selected from groups 4, and 14 of the periodic table of elements, wherein M3is more preferably selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Ce and mixtures of two or more thereof, wherein M3is more preferably selected from the group consisting of Si, Ti, Zr, Hf, Ce, and mixtures of two or more thereof.In the case where M3is selected from group 14 of the periodic table of elements, it is preferred that M3does not comprise carbon.It is preferred that M4is selected from group 5 of the periodic table of elements, wherein M4is more preferably selected from the group consisting of V, Nb, Ta, and mixtures of two or more thereof.It is preferred that the molding obtained from (ii) exhibits an X-ray diffraction pattern comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, more preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, more preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, wherein M1is more preferably Mg and wherein M2is more preferably Al.It is preferred that the molding obtained from (ii) has a water adsorption in the range of from 25 to 70 weight-%, more preferably in the range of from 37 to 47 weight-%, more preferably in the range of from 40 to 44 weight-%, wherein the water adsorption is preferably determined according to Reference Example 1.1.It is preferred that the molding obtained from (ii) has a BET specific surface area in the range of from 35.0 to 100.0 m2 / g, more preferably in the range of from 40.0 to 60.0 m2 / g, more preferably in the range of from 45.0 to 55.0 m2 / g, wherein the BET specific surface area is preferably determined according to Reference Example 1.3.It is preferred that the molding obtained from (ii) has a total pore volume in the range of from 0.20 to 0.7 ml / g, more preferably in the range of from 0.30 to 0.42 ml / g, more preferably in the range of from 0.33 to 0.39 ml / g, wherein the total pore volume is preferably determined according to Reference Example 1 .4.It is preferred that molding the mixture according to (i) comprises tableting or extruding.It is preferred that calcining according to (ii) is conducted at a temperature in the range of from 300 to 1400 °C, more preferably in the range of from 700 to 1100 °C, more preferably in the range of from 900 to 1000 °C.It is preferred that calcining according to (ii) is conducted for a period of time in the range of from 0.1 to 48 h, more preferably in the range of from 0.5 to 24 h, more preferably in the range of from 1 to 12 h.It is preferred that the gas atmosphere according to (ii) comprises, preferably consists of, one or more of oxygen and nitrogen, more preferably air.It is preferred that the process further comprises, preferably after (ii) and prior to (iii), (ii’) treating the molding obtained from (ii) with an acid.In the case wherein the process further comprises (ii’), it is preferred that treating according to (ii’) comprises immersing the molding in the acid.Further in the case wherein the process further comprises (ii’), it is preferred that treating according to (ii’) is conducted for a period of time in the range of from 10 to 400 minutes, more preferably in the range of from 45 to 75 minutes, more preferably in the range of from 55 to 65 minutes.Further in the case wherein the process further comprises (ii’), it is preferred that treating according to (ii’) is conducted at a temperature in the range of from 0 to 75 °C, more preferably in the range of from 10 to 40 °C, more preferably in the range of from 15 to 35 °C.Further in the case wherein the process further comprises (ii’), it is preferred that the acid according to (ii’) is an aqueous acid.In the case wherein the acid according to (ii’) is an aqueous acid, it is preferred that the aqueous acid has a weight ratio of acid to water in the range of from 1 :1 to 1 :10, more preferably in the range of from 1 :3 to 1 :5, more preferably in the range of from 1 :3.9 to 1 :4.1.Further in the case wherein the acid according to (ii’) is an aqueous acid, it is preferred that the aqueous acid has a concentration of acid in water in the range of from 2.5 to 4.5 mol / l, more preferably in the range of from 3.2 to 3.7 mol / l, more preferably in the range of from 3.3 to 3.6 mol / l.Further in the case wherein the process further comprises (ii’), it is preferred that the acid according to (ii’) comprises, preferably consists of, one or more of an inorganic acid and an organic acid, more preferably one or more of HNO3, HCI , H2SO4, H3PO4, formic acid, oxalic acid, acetic acid, more preferably HNO3.Further in the case wherein the process further comprises (ii’), it is preferred that the process further comprises after (ii’) and prior to (iii), preferably after (ii’) and prior to (ii”) as defined herein below(ii’,1) washing the molding obtained from (ii’) with de-ionized water.Further in the case wherein the process further comprises (ii’), it is preferred that the process further comprises after (ii’) and prior to (iii), preferably after (ii’,1) and prior to (iii), preferably after (ii’,1) and prior to (ii”),(ii’.2) drying the molding obtained from (ii’) or (ii’,1) in a gas atmosphere.In the case wherein the process further comprises (ii’.2), it is preferred that drying according to (ii’ .2) is conducted at a temperature in the range of from 80 to 160 °C, more preferably in the range of from 100 to 140 °C, more preferably in the range of from 110 to 130 °C.Further in the case wherein the process further comprises (ii’ .2), it is preferred that drying according to (ii’.2) is conducted for a period of time in the range of from 0.5 to 20 h, more preferably in the range of from 2 to16 h, more preferably in the range of from 3 to 12 h.Further in the case wherein the process further comprises (ii’ .2), it is preferred that the gas atmosphere according to (ii’ .2) comprises, preferably consists of, one or more of oxygen and nitrogen, more preferably air.Further in the case wherein the process further comprises (ii’), it is preferred that the process further comprises(ii”) calcining the molding obtained from (ii’), (ii’,1) or (ii’.2) in a gas atmosphere.In the case wherein the process further comprises (ii”), it is preferred that calcining according to (ii”) is conducted at a temperature in the range of from 400 to 1200 °C, more preferably in the range of from 600 to 950 °C, more preferably in the range of from 825 to 875 °C.Further in the case wherein the process further comprises (ii”), it is preferred that calcining according to (ii”) is conducted for a period of time in the range of from 0.1 to 1.5 h, more preferably in the range of from 0.3 to 0.7 h, more preferably in the range of from 0.4 to 0.6 h.Further in the case wherein the process further comprises (ii”), it is preferred that the gas atmosphere according to (ii”) comprises, preferably consists of, one or more of oxygen and nitrogen, more preferably air.It is preferred that treating according to (iii) is achieved by impregnation, more preferably by incipient wetness impregnation.It is preferred that treating according to (iii) is conducted for a period of time in the range of from 0.1 to 12 h, more preferably in the range of from 0.15 to 9 h, more preferably in the range of from 0.2 to 6 h.It is preferred that treating according to (iii) is conducted at a temperature in the range of from 0 to 50 °C, more preferably in the range of from 10 to 40 °C, more preferably in the range of from 15 to 35 °C.It is preferred that the source of Ru comprises, preferably consists of, one or more of a Ru nitro- syl salt, more preferably Ru(NO)NOs, a Ru halide, preferably RuCh hydrate, and Ru acetate.It is preferred that the alkali metal is selected from the group consisting of Li, Na, K, Rb, Cs, and mixtures of two or more thereof, more preferably from the group consisting of K, Cs, and mixtures of two or more thereof, wherein the alkali metal more preferably is K or Cs, wherein the alkali metal more preferably is K.It is preferred that the source of the alkali metal comprises, preferably consists of, one or more of an organic salt or an inorganic salt of the alkali metal, more preferably one or more of an acetate, a nitrate, a halide, preferably an acetate or nitrate, of the alkali metal.It is preferred that the molar ratio of Ru, calculated as an element; to the alkali metal, calculated as sum of the one or more alkali metals as elements, in the aqueous solution according to (iii) is in the range of from 0.10:1 to 1.00:1 , more preferably in the range of from 0.20:1 to 0.50:1 , more preferably in the range of from 0.25:1 to 0.45:1.It is preferred that in (iii) the aqueous solution further comprises an acid, wherein the acid comprises, preferably consists of, one or more of an inorganic acid and an organic acid, more preferably one or more of HNO3, HCI, H2SO4, H3PO4, formic acid, oxalic acid, acetic acid, more preferably HNO3.In the case wherein in (iii) the aqueous solution further comprises an acid, wherein the acid comprises, preferably consists of, one or more of an inorganic acid and an organic acid, it is preferred that the aqueous solution has a weight ratio of acid to water in the range of from 1 :1 to 1 :10, more preferably in the range of from 1 :3 to 1 :5, more preferably in the range of from 1 :3.9 to 1 :4.1.It is preferred that the process further comprises(iv) drying the molding obtained from (iii) in a gas atmosphere, wherein drying is more preferably conducted at a temperature in the range of from 80 to 220 °C, more preferably from 90 to 200 °C, more preferably from 100 to 180 °C, wherein the gas atmosphere more preferably comprises one or more of nitrogen and oxygen, more preferably air.It is preferred that the process further comprises(v) activating the molding obtained from (iii) or (iv) in a gas atmosphere comprising hydrogen, wherein activating is conducted at a temperature in the range of from 200 to 400 °C, more preferably from 240 to 360 °C, wherein activating is conducted for a time period in the range of from 0.1 to 48 h, more preferably from 0.5 to 36 h, wherein the gas atmosphere more preferably comprises an inert gas, wherein the inert gas more preferably is one or more of Ar and N2, more preferably N2, wherein the gas atmosphere more preferably comprises from 0.01 to 10 volume-%, more preferably from 0.5 to 6 volume-%, of H2 in the inert gas.Further, the present invention relates to a catalytic material obtained or obtainable by the process of any one of the embodiments disclosed herein.It is preferred that the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material.In the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the support material is selected from the group consisting of M1O, M22O3, M3C>2, M Os, M1M22C>4, and mixtures of two or more thereof, more preferably from the group consisting of M1O, M22O3, and M1M22C>4, wherein the support material more preferably is M1M22C>4, wherein M1stands for one or more divalent elements, M2stands for one or more trivalent elements, M3stands for one or more tetravalent elements, M4stands for one or more pentavalent elements.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the support material comprises a crystalline phase having a spinel structure, wherein the crystalline phase having a spinel structure is preferably determined according to Reference Example 1.2.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that M1is selected from groups 2, 10, 11 and 12 of the periodic table of elements, wherein M1is more preferably selected from the group consisting of Mg, Ca, Ni, Cu, Zn, Mn, Co, and mixtures of two or more thereof, more preferably selected from the group consisting of Mg, Ni, Cu, Zn, and mixtures of two or more thereof, more preferably from the group consisting of Mg, Zn, Cu, and mixtures thereof, more preferably from the group consisting of Mg, Zn, and mixtures thereof, wherein M1more preferably is Mg.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that M2is selected from groups 5, 6, 7, 8 and 13 of the periodic table of elements, wherein M2is more preferably selected from the group consisting of Al, Ga, In, Cr, Fe, V, Mn, Co, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, Cr, Fe, V, Mn, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, V, Mn, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, and mixtures of two or more thereof, wherein M2more preferably is Al.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that M3is selected from groups 4, and 14 of the periodic table of elements, wherein M3is more preferably selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Ce and mixtures of two or more thereof, wherein M3is more preferably selected from the group consisting of Si, Ti, Zr, Hf, Ce and mixtures of two or more thereof.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that M4is selected from group 5 of the periodic table of elements, wherein M4is more preferably selected from the group consisting of V, Nb, Ta, and mixtures of two or more thereof.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the alkali metal is selected from the group consisting of Li, Na, K, Rb, Cs, and mixtures of two or more thereof, more preferably from the group consisting of K, Cs, and mixtures of two or more thereof, wherein the alkali metal more preferably is K or Cs, wherein the alkali metal more preferably is K.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the catalytic material further comprises from 0.5 to 5.0 weight-%, more preferably from 2.0 to 4.0 weight-%, more preferably from 2.4 to 3.6 weight-%, more preferably from 2.6 to 3.4 weight-%, more preferably from 3.0 to 3.4 weight-%, of the alkali metal, calculated as element, based on the sum of the weights of the one or more divalent elements M1, calculated as M1O, the one or more trivalent elements M2, calculated as M22O3, the one or more tetravalent elements M3, calculated as M3C>2, the one or more pentavalent elements M4, calculated as M Os.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the catalytic material comprises from 0.5 to 5 weight-%, more preferably from 1.0 to 3.0 weight-%, more preferably from 1 .4 to 2.6 weight-%, more preferably from 1 .6 to 2.4 weight-%, more preferably from 1.8 to 2.2 weight-%, of Ru, calculated as element, based on the sum of the weights of the one or more divalent elements M1, calculated as M1O, the one or more trivalent elements M2, calculated as M22O3, the one or more tetravalent elements M3, calculated as M3O2, the one or more pentavalent elements M4, calculated as M Os.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the support material has a total pore volume in the range of from 0.10 to 0.90 ml / g, more preferably in the range of from 0.18 to 0.75 ml / g, more preferably in the range of from 0.25 to 0.60 ml / g, more preferably in the range of from 0.33 to 0.53 ml / g, more preferably in the range of from 0.37 to 0.49 ml / g, more preferably in the range of from 0.40 to 0.46 ml / g, wherein the total pore volume is preferably determined according to Reference Example 1.4.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the support material has a crystallinity in the range of 50 to 100 %, more preferably of 60 to 100 %, more preferably of 70 to 95 %, more preferably of 80 to 90 %, wherein the crystallinity is preferably determined according to Reference Example 1.2.In the case wherein the support material has a crystallinity in the range of 50 to 100 %, it is preferred that from 50 to 100 %, more preferably from 70 to 100 %, more preferably from 95 to 100 %, of the crystalline phase has the spinel structure as determined by XRD, preferably as determined according to Reference Example 1 .2.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the catalytic material exhibits an X-ray diffraction pattern comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, more preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, more preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, wherein M1is more preferably Mg and wherein M2is more preferably Al.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the support material has a median pore diameter in the range of from 0.001 to 0.1 pm, more preferably in the range of from 0.005 to 0.05 pm, more preferably in the range of from 0.02 to 0.04 pm, more preferably in the range of from 0.027 to 0.035 pm, more preferably in the range of from 0.028 to 0.034 pm, wherein the pore size distribution is preferably determined according to Reference Example 1 .5.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the support material has a water adsorption in the range of from 10 to 80 weight-%, more preferably in the range of from 30 to 60 weight-%, more preferably in the range of from 40 to 50 weight-%, more preferably in the range of from 43 to 47 weight-%, wherein the water adsorption is preferably determined according to Reference Example 1.1.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the support material has a BET specific surface area in the range of from 20.0 to 150.0 m2 / g, more preferably in the range of from 30.0 to 90.0 m2 / g, more preferably in the range offrom 40.0 to 65.0 m2 / g, more preferably in the range of from 45.0 to 55.0 m2 / g, wherein the BET specific surface area is preferably determined according to Reference Example 1.3.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the Ru is homogeneously dispersed throughout the catalytic material.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that the alkali metal M3is homogeneously dispersed throughout the catalytic material.Further in the case wherein the catalytic material comprises Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material, it is preferred that from 85 to 100 weight-%, preferably from 90 to 100 weight-%, more preferably from 95 to 100 weight-%, more preferably from 98 to 100 weight-%, more preferably from 99 to 100 weight-%, more preferably from 99.9 to 100 weight-%, of the catalytic material consist of the support material, Ru, and the alkali metal.It is preferred that the catalytic material is in the form of an extrudate, a tablet, or a granule.In the case wherein the catalytic material is in the form of an extrudate, a tablet, or a granule, it is preferred that the extrudate or the tablet has a cross-section, wherein the cross-section is circular, hexagonal, rectangular, quadratic, triangular, oval, a star-shaped polygon, or cloverleafshaped, preferably circular, hexagonal, rectangular, quadratic, triangular, oval, a star-shaped polygon having 3, 4, 5, 6, 7, or 8 tips, a trilobe, a quadrilobe or a hexalobe, more preferably circular, hexagonal, rectangular, quadratic, triangular, oval, a star-shaped polygon having 3 or 4 tips, a trilobe, a quadrilobe or a hexalobe.It is preferred that the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a quadrilobe.In the case wherein the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a quadrilobe, it is preferred that the tablet has a thickness, wherein the thickness is in the range of from 2.0 to 13.0 mm, more preferably in the range of from 5.0 to 10.0 mm, more preferably in the range of from 6.5 to 9.0 mm.Further in the case wherein the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a quadrilobe, it is preferred that the tablet has a diameter D inthe range of from 5 to 20 mm, more preferably in the range of from 7 to 17 mm, more preferably in the range of from 9 to 15 mm.It is preferred that the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a hexalobe.In the case wherein the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a hexalobe, it is preferred that the tablet has a thickness, wherein the thickness is in the range of from 2.0 to 15.0 mm, more preferably in the range of from 5.0 to 12.0 mm, more preferably in the range of from 8.0 to 9.0 mm.Further in the case wherein the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a hexalobe, it is preferred that the tablet has a diameter D in the range of from 5 to 25 mm, more preferably in the range of from 12 to 19 mm, more preferably in the range of from 14 to 17 mm.Further in the case wherein the catalytic material is in the form of an extrudate, a tablet, or a granule, it is preferred that the catalytic material is in the form of an extrudate having a crosssection, wherein the cross-section is circular or a star-shaped polygon or a trilobe.In the case wherein the catalytic material is in the form of an extrudate having a cross-section, wherein the cross-section is circular or a star-shaped polygon or a trilobe, it is preferred that the extrudate has a thickness, wherein the thickness is in the range of from 1.0 to 12.0 mm, more preferably in the range of from 1.5 to 10.0 mm, more preferably in the range of from 2.0 to 8.0 mm.Further in the case wherein the catalytic material is in the form of an extrudate having a crosssection, wherein the cross-section is circular or a star-shaped polygon or a trilobe, it is preferred that the extrudate has a diameter, wherein the diameter is in the range of from 1 to 20 mm, more preferably in the range of from 2 to 18 mm, more preferably in the range of from 3 to 16 mm.Yet further, the present invention relates to a process for converting NH3 to H2 and N2, the process comprising(A) providing a reactor containing a catalytic material according to any one of the embodiments disclosed herein;(B) preparing a feed gas stream comprising NH3;(C) feeding the feed gas stream prepared in (B) into the reactor provided in (A) and contacting the feed gas stream with the catalytic material, wherein contacting is performed at a pressure of greater than 10 bara, and at a temperature in the range of from 200 to 650 °C;(D) removing an effluent gas stream from the reactor, the effluent gas stream comprising H2 and N2.It is preferred that contacting is performed at a pressure in the range of from 11 to 50 bara, more preferably of from 15 to 40 bara, more preferably of from 19 to 31 bara.It is preferred that contacting is performed at a temperature in the range of from 250 to 650 °C, more preferably of from 275 to 625 °C, and more preferably of from 300 to 600 °C.It is preferred that the feed gas stream prepared in (B) comprises from 1 to 100 vol.-% of NH3, more preferably from 3 to 99.99 vol.-%, more preferably from 5 to 99.95 vol.-%, more preferably from 10 to 99.9 vol.-%, more preferably from 20 to 99.8 vol.-%, more preferably from 30 to 99.7 vol.-%, more preferably from 40 to 99.6 vol.-%, and more preferably from 50 to 99.5 vol.-%.It is preferred that the feed gas stream prepared in (B) comprises from 0 to 50 vol.-% of N2, more preferably from 0.01 to 30 vol.-%, more preferably from 0.03 to 15 vol.-%, more preferably from 0.05 to 5 vol.-%, more preferably from 0.1 to 1 vol.-%, more preferably from 0.12 to 0.5 vol.-%, and more preferably from 0.14 to 0.16 vol.-%.It is preferred that the feed gas stream prepared in (B) comprises from 0 to 75 vol.-% of H2, more preferably from 0 to 60 vol.-%, more preferably from 0 to 50 vol.-%, more preferably from 0 to 40 vol.-%, more preferably from 0 to 35 vol.-%, and more preferably from 0 to 30 vol.-%.It is preferred that the feed gas stream prepared in (B) comprises from 100 to 50,000 ppmv of H2O, preferably from 200 to 30,000 ppmv, more preferably from 500 to 25,000 ppmv, more preferably from 500 to 20,000 ppmv, more preferably from 500 to 15,000 ppmv, more preferably from 750 to 15,000 ppmv, more preferably from 1 ,000 to 11 ,000 ppmv, more preferably from 1 ,000 to 10,000 ppmv, more preferably from 2,000 to 8,000 ppmv, more preferably from 3,000 to 7,500 ppmv, more preferably from 4,500 to 7,000 ppmv, more preferably from 5,000 to 6,500 ppmv.It is preferred that the total amount of NH3, N2, and H2 comprised in the feed gas stream prepared in (B) is in the range from 90 to 100 wt.-%, more preferably from 95 to 99.95 vol.-%, more preferably from 98 to 99.9 vol.-%, more preferably from 99 to 99.85 vol.-%, and more preferably from 99.7 to 99.8 vol.-%.It is preferred that the feed stream is fed into the reactor at a gas hourly space velocity in the range of from 500 to 20,000 h’1, more preferably of from 500 to 16,000 h’1, more preferably of from 700 to 14,000 h’1, more preferably of from 800 to 12,000 h’1, more preferably of from 900 to 10,000 h’1, more preferably of from 1,000 to 8,000 h’1, and more preferably of from 3,000 to 5,000 hr1.Yet further, the present invention relates to use of a catalytic material according to any one of the embodiments disclosed herein for converting NH3 to H2 and N2.Yet further, the present invention relates to a process, preferably the process according to any one of the embodiments disclosed herein, comprising the step of converting the H2 obtainable or obtained according to (D) as described in any one of the embodiments disclosed herein, to obtain a product Q.It is preferred that the product Q is selected from: building block or monomer; or polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or cleaning polymer, cleaning surfactant, descaling compound, cleaning biocide or composition or formulation thereof; or agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth)acry- late hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; or cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate.It is preferred that the content of H2 obtainable or obtained according to (D) as described in any one of the embodiments disclosed herein in the product Q is 1 weight-% or more, more preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or wherein the content of H2 obtainable or obtained according to (D) as described in any one of the embodiments disclosed herein in the product Q is 100 weight-% or less, more preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and more preferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and embodiment chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.The publication Prior Art Disclosure; Issue 684; paragraphs

[1000] to

[8005] ; ISSN: 2198-4786; published: February 12, 2024 will be regarded as Reference RF1 , which is incorporated herein by reference in its entirety. Preferably, the product Q is a product as described in Reference RF1 ; paragraphs

[1000] to

[8005] , Preferably, the process described herein is further a process for the production of a product.The converting step to obtain the product Q preferably comprises one or more step(s) as described below and can be performed by conventional methods well known to a person skilled in the art. The converting step preferably comprises one or more step(s) selected from: recycling, preferably depolymerizing, gasifying, pyrolyzing, and / or steam cracking; and / or purifying, preferably crystallizing, (solvent) extracting, distilling, evaporating, hydrotreating, absorbing, adsorbing and / or subjecting to ion exchanger; and / or assembling, preferably foaming, synthesizing, chemical conversion, chemically transforming, polymerizing and / or compounding; and / or forming, preferably foaming, extruding and / or molding; and / or finishing, preferably coating and / or smoothing.In addition, the one or more step(s) are described in detail in Reference RF1 ; paragraphs

[1000] to

[8005] ,The term “building block”, as used in the context of the product Q herein, comprises compounds, which are in a gaseous or liquid state under standard conditions of 0°C and 0.1 MPa. Building blocks are typically used in chemical industry to form secondary products, which provide a higher structural complexity and / or higher molecular weight than the building block onwhich the secondary product is based. The building block is preferably selected from the group consisting of hydrogen, carbon monoxide, carbon dioxide, ethylene oxide, ethylene glycols, syngas comprising a mixture of hydrogen and carbon monoxide, alkanes, alkenes, alkynes and aromatic compounds. The alkanes, alkenes, alkynes and aromatic compounds comprise in particular 1 to 12 carbon atoms, respectively.The term “monomer”, as used in the context of the product Q herein, comprises molecules, which can react with each other to form polymer chains by polymerization. The monomer is preferably selected from the group consisting of (meth)acrylic acid, salts of (meth)acrylic acid; in particular sodium, potassium and zinc salts; (meth)acrolein and (meth)acrylates. (Methacrylates comprising 1 to 22 carbon atoms are preferred, in particular comprising 1 to 8 carbon atoms. The terms (meth)acrylic acid, (meth)acrolein or (meth)acrylate relate to acrylic acid, acrolein or acrylate and also to methacrylic acid, methacrolein or methacrylate, where applicable. Further, the monomer can be selected from hexamethylenediamine (HMD) and adipic acid.The building block can further be an intermediate compound. The term “intermediate compound”, as used in the context of the product Q herein, comprises organic reagents, which are applied for formation of compounds with higher molecular complexity. The intermediate compound can be selected for example from the group consisting of phosgene, polyisocyanates and propylene oxide. The polyisocyanates are in particular aromatic di- and polyisocyanates, preferably toluene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI).The building block and the monomer and typical converting step(s) to obtain the building block or monomer are described in more detail in paragraphs

[1000] to

[1012] of Reference RF1.The term “polymer A”, as used in the context of the product Q herein, comprises thermoplastic, e.g., polyamide or thermoplastic polyurethane, thermoset, e.g., polyurethane, elastomer, e.g., polybutadiene, or a copolymer or a mixture thereof and is defined in more detail in paragraphs

[2001] to

[2007] of Reference RF1.The term “polymer composition A”, as used in the context of the product Q herein, comprises all compositions comprising a polymer as described above and one or more additive(s), e.g. reinforcement, colorant, modifier and / or flame retardant, and is defined in more detail in paragraph

[2008] of Reference RF1.The term “polymer product A”, as used in the context of the product Q herein, comprises any product comprising the polymer A and / or polymer composition A as described above and is defined in more detail in paragraphs

[2009] and

[2010] of Reference RF1.The step(s) to obtain the polymer, preferably polymer A, polymer composition, preferably polymer composition A or polymer product, preferably polymer product A is / are described in more detail in paragraph

[2011] of Reference RF1.The term “industrial use polymer”, as used in the context of the product Q herein, comprises rheology, polycarboxylate, alkoxylated polyalkylenamine, alkoxylated polyalkylenimine, poly- ether-based, dye inhibition and soil release cleaning polymers defined in more detail in paragraphs

[3035] to

[3044] of Reference RF1. The term “industrial use surfactant”, as used in the context of the product Q herein, comprises non-ionic, anionic and amphoteric industrial use surfactants defined in more detail in paragraphs

[3008] to

[3034] of Reference RF1. The term “industrial use descaling compound”, as used in the context of the product Q herein, comprises non-phosphate based builders (NPB) and phosphonates (CoP) described in more detail in paragraphs

[3001] to

[3005] of Reference RF1. The term “industrial use biocide”, as used in the context of the product Q herein, refers to a chemical compound that kills microorganisms or inhibits their growth or reproduction defined in more detail in paragraphs

[3006] to

[3007] of Reference RF1. The term “industrial use solvent”, as used in the context of the product Q herein, comprises alkyl amides, alkyl lactamides, alkyl esters, lactate esters, alkyl diester, cyclic alkyl diester, cyclic carbonates, aromatic aldehydes and aromatic esters defined in more detail in paragraphs

[3045] to

[3055] of Reference RF1. The term “industrial use dispersant”, as used in the context of the product Q herein, comprises anionic and non-ionic industrial use dispersants defined in more detail in paragraphs

[3056] to

[3058] of Reference RF1. The term “composition and / or formulation thereof” with reference to the industrial use polymers, industrial use surfactants, descaling compounds and / or industrial use biocides refers to industrial use compositions and / or institutional use products and / or fabric and home care products and / or personal care products defined in more detail in paragraph

[3059] of Reference RF1. The converting step(s) to obtain the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3060] of Reference RF1. The converting steps to obtain the industrial use composition or formulation of the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3061] of Reference RF1.The term “agrochemical composition”, as used in the context of the product Q herein, typically relates to a composition comprising an agrochemically active ingredient and at least one agrochemical formulation auxiliary. Examples of agrochemical compositions, active ingredients and auxiliaries are described in more detail in Reference RF1 , paragraph

[4001] ,The agrochemical composition may take the form of any customary formulation. The agrochemical compositions are prepared in a known manner, e.g. described by Mollet and Grubemann, Formulation technology, Wiley VCH, Weinheim, 2001 ; or Knowles, New developments in crop protection product formulation, Agrow Reports DS243, T&F Informa, London, 2005. The converting step(s) to obtain the agrochemically active ingredients and auxiliaries may be conducted in analogy to the production step(s) of their analogues that are based on petrochemicals or other precursors that are not gained by recycling processes. In addition, conversion to compounds mentioned in sections “Polymer” and “Cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or compositions or formulations thereof” may be performed as described in these sections as well as the respective paragraphs in Reference RF1.The term active pharmaceutical ingredients and / or intermediates thereof, as used in the context of the product Q herein, comprises substances that provide pharmacological activity or other direct effect in the diagnosis, cure, mitigation, treatment, or prevention of disease, or to affect the structure or any function of the body. Intermediates thereof are isolated products that are generated during a multi-step route of synthesis of an active pharmaceutical ingredient. The term pharmaceutical excipients, as used in the context of the product Q herein, comprises compounds or compound mixtures used in compositions for various pharmaceutical applications, which are not substantially pharmaceutically active on itself. Active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients are defined in more detail in paragraph

[5001] of Reference RF1.The converting step(s) to obtain the active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms animal feed additives, human food additives, dietary supplements, as used in the context of the product Q herein, comprises Vitamins, Pro-Vitamins and active metabolites thereof including intermediates and precursors, especially Vitamin A, B, E, D, K and esters thereof, like acetate, propionate, palmitate esters or alcohols thereof like retinol or salts thereof and any combinations thereof; Tetraterpenes, especially isoprenoids like carotenoids and xanthophylls including their intermediates and precursors as well as mixtures and derivates thereof, especially beta carotene, Canthaxanthin, Citranaxanthin, Astaxanthin, Zeaxanthin, Lutein, Lycopene, Apo-carotenoids, and any combinations thereof; organic acids, especially formic acid, propionic acid and salts thereof, such as sodium, calcium or ammonium salts, and any combinations thereof, such as but not limited to mixtures of formic acid and sodium formiate, propionic acid and ammonium propionate, formic acid and propionic acid, formic acid and sodiumformiate and propionic acid, propionic acid and sodium propionate and formic acid and sodium formiate; glycerides of carboxylic acids and short and medium chain fatty acids, conjugated linoleic acids, such as omega-6 fatty acid (C18:2) methyl ester and 1 ,2-propandiol and beverage stabilizers, such as polyvinylpyrrolidone-polymer or polyvinylimidazole / polyvinylpyrrolidone-co- polymer. Animal feed additives, human food additives and dietary supplements are defined in more detail in paragraph

[5002] of Reference RF1.The converting step(s) to obtain the animal feed additives, human food additives, dietary supplements may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms aroma chemical and aroma composition as used in the context of the product Q herein, comprise a volatile organic substance with a molecular weight between 70-250 g / mol comprising a functional group with a carbon skeleton of C5-C16 carbon atoms comprising linear, branched, cyclic, for example with a ring size of C5-C18, bicyclic or tricyclic aliphatic chains and but not necessarily one or more unsaturated structural elements like double bonds, triple bonds, aromatics or heteroaromatics and preferably the one or more additional functional groups are selected from alcohol, ether, ester, ketone, aldehyde, acetal, carboxylic acid, nitrile, thiol, amine. In one aspect, the aroma chemical is a terpene-based aroma chemical, for example selected from monoterpenes and monoterpenoids, sesquiterpenes and sesquiterpenoids, diterpenes, triterpenes or tetraterpenes. Aroma chemicals can be combined with further aroma chemicals to give an aroma composition. Aroma chemicals and aroma compositions are defined in more detail in paragraph

[5003] of Reference RF1.The converting step(s) to obtain the aroma chemical and aroma composition may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The term “aqueous polymer dispersion”, as used in the context of the product Q herein, comprises aqueous composition(s) comprising dispersed polymer(s) and is defined in more detail in the section

[6001] entitled “aqueous polymer dispersion” of Reference RF1. The dispersed polymers) may be selected from acrylic emulsion polymer(s), styrene acrylic emulsion polymer(s), styrene butadiene dispersion(s), aqueous dispersion(s) comprising composite particles, acrylate alkyd hybrid dispersion(s), polyurethane(s) (including UV-curable polyurethanes) and polyurethane - poly(meth)acrylate hybrid polymer(s). The term “emulsion polymer”, as used in the context of the product Q herein, comprises polymer(s) made by free-radical emulsion polymerization. Aqueous polyurethane dispersion(s) are defined in more detail in the section

[6002] entitled “Polyurethane dispersions” of Reference RF1. UV-curable polyurethane(s) is / are defined inmore detail in the section

[6017] of Reference RF1. Polyurethane - poly(meth)acrylate hybrid polymer(s) is / are defined in more detail in the section

[6016] of Reference RF1.The term “polymeric dispersant”, as used in the context of the product Q herein, comprises preferably polymer(s) comprising polyether side chain, in particular polycarboxylate ether polymer(s) and polycondensation product(s) defined in more detail in paragraph

[6020] entitled “Polymeric dispersant” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polymer dispersion(s) comprising emulsion polymer(s) is / are defined in more detail in the section

[6003] entitled “Emulsion polymerization” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polyurethane dispersion(s) is / are defined in more detail in the section

[6014] entitled “Process for the preparation of aqueous polyurethane dispersions” and section [6017)] entitled “Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” of Reference RF1. Composition(s) and uses of aqueous polymer dispersion(s) and of polymeric dispersant(s) are defined in more detail in the following sections of Reference RF1 : section

[6004] entitled “Uses of aqueous polymer dispersions”, section

[6005] entitled “Binders for architectural and construction coatings” section

[6006] entitled “Binders for paper coating” section

[6007] entitled “Binders for fiber bonding” section

[6008] entitled “Adhesive polymers and adhesive compositions” section

[6015] entitled “Aqueous polyurethane dispersions suitable for use in coating compositions” section

[6016] entitled “Aqueous polyurethane - poly(meth)acrylate hybride polymer dispersions suitable for use in coating compositions” section

[6017] entitled “Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” section

[6018] entitled “Inorganic binder compositions comprising polymeric dispersants and their use”

[6019] 100% curable coating compositionsUV-crosslinkable poly(meth)acrylate(s) and its / their uses are defined in more detail in section

[6009] entitled “UV-crosslinkable poly(meth)acrylates for use in UV-curable solvent-free hotmelt adhesives and their use for making pressure-sensitive self-adhesive articles” of Reference RF1.Polyisocyanate(s), composition(s) comprising them and their uses are defined in more detail in section

[6010] entitled “Polyisocyanates” of Reference RF1.Hyperbranched polyester polyol(s) and its / their uses are defined in more detail in section

[6011] entitled “Organic solvent based hyperbranched polyester polyols suitable for use in coating compositions” of Reference RF1. The converting step(s) to obtain the hyperbranched polyester polyols is / are defined in more detail in the section

[6012] entitled “Preparation of organic solvent based hyperbranched polyester polyols” of Reference RF1. Coating composition(s) comprising hyperbranched polyester polyol(s), polyisocyanate(s) and additive(s) and substrate(s) coated therewith are defined in more detail in section

[6013] entitled “Organic solvent based two component coating compositions comprising hyperbranched polyester polyols and polyisocyanates” of Reference RF1.Unsaturated polyester polyol(s), solvent-based coating composition(s) comprising said unsaturated polyester polyol(s) and substrate(s) for coating with said coating composition(s) are defined in more detail in section

[6018] entitled “Organic solvent based coating composition comprising unsaturated polyester polyols” of Reference RF1.100% curable coating composition(s) is / are defined in more detail in section

[6019] of Reference RF1.Polymeric dispersant(s) for inorganic binder compositions is / are defined in more detail in section

[6020] of Reference RF1. The inorganic binder composition(s) comprising the polymeric dispersants and their use are defined in more detail in section

[6021] of Reference RF1. The converting step(s) to obtain the polymeric dispersant(s) are defined in more detail in section

[6020] of Reference RF1. The term “inorganic binder composition” comprising the polymeric dispersants), as used in the context of the product Q herein, comprises preferably in particular hydraulically setting compositions and compositions comprising calcium sulfate and is defined in more detail in section

[6021] of Reference RF1 entitled “Inorganic binder compositions comprising the polymeric dispersant and their use”. Specific building material formulation(s) comprising polymeric dispersant(s) or building product(s) produced by a building material formulation comprising a polymeric dispersant are disclosed in more detail in section

[6021] of Reference RF1.The term “cosmetic surfactant”, as used in the context of the product Q herein, comprises nonionic, anionic, cationic and amphoteric surfactants and is defined in more detail in paragraph

[7002] of Reference RF1. The term “emollient”, as used in the context of the product Q herein, refers to a chemical compound used for protecting, moisturizing, and / or lubricating the skin and is defined in more detail in paragraph

[7003] of Reference RF1. The term “wax”, as used in the context of the product Q herein, comprises pearlizers and opacifiers and is defined in more detail in paragraph

[7004] of Reference RF1. The term “cosmetic polymer”, as used in the context of the product Q herein, comprises any polymer that can be used as an ingredient in a cosmeticformulation and is defined in more detail in paragraph

[7005] of Reference RF1. The term “UV filter”, as used in the context of the product Q herein, refers to a chemical compound that blocks or absorbs ultraviolet light and is defined in more detail in paragraph

[7006] of Reference RF1.The term “further cosmetic ingredient”, as used in the context of the product Q herein, comprises any ingredient suitable for making a cosmetic formulation. Several sources disclose cosmetically acceptable ingredients. E. g. the database Cosing on the internet pages of the European Commission discloses cosmetic ingredients and the International Cosmetic Ingredient Dictionary and Handbook, edited by the Personal Care Products Council (PCPC), discloses cosmetic ingredients. The term “composition and / or formulation thereof’ with reference to the cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter and / or further cosmetic ingredient refers to personal care and / or cosmetic compositions or formulations defined in more detail in paragraph

[7007] of Reference RF1. The converting step(s) to obtain the cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter or further cosmetic ingredient is / are defined in more detail in paragraph

[7008] of Reference RF1.The terms “polymer B”, “polymer composition B”, “coating composition”, “other functional composition”, “foil”, “molded body”, “coating” and “coated substrate” are well known to the person skilled in the art and are defined in more detail from paragraph

[8000] to

[8005] of Reference RF1.The unit bara relates to an absolute pressure, wherein 1 bar equals 105Pa.The present invention is further illustrated by the following set of embodiments and combinations of embodiments resulting from the dependencies and back-references as indicated. In particular, it is noted that in each instance where a range of embodiments is mentioned, for example in the context of a term such as "The process of any one of embodiments 1 to 4", every embodiment in this range is meant to be explicitly disclosed for the skilled person, i.e. the wording of this term is to be understood by the skilled person as being synonymous to "The process of any one of embodiments 1 , 2, 3 and 4". Further, it is explicitly noted that the following set of embodiments represents a suitably structured part of the general description directed to preferred aspects of the present invention, and, thus, suitably supports, but does not represent the claims of the present invention.1 . Process for preparing a catalytic material, the process comprising(i) molding a mixture comprising one or more sources for a support material;(ii) calcining the molding obtained from (i) in a gas atmosphere, obtaining a molding comprising a support material;(iii) impregnating the molding with an aqueous solution comprising both a source of Ru and a source of an alkali metal.2. The process of embodiment 1 , wherein the one or more sources for a support material are selected from the group consisting of a source for M1O, a source for M22O3, a source for M3O2, a source for M Os, and mixtures of two or more thereof, wherein the one or more sources for a support material are preferably selected from the group consisting of a source for M1O, a source for M22O3, a source for M3O2, and mixtures of two or more thereof, wherein the one or more sources for a support material are more preferably selected from the group consisting of a source for M1O, a source for M22C>3, and mixtures of two or more thereof, wherein the one or more sources for a support material more preferably consist of a source for M1O and a source for M22C>3, wherein the one or more sources for a support material more preferably consist of a source for M1O and M22C>3, wherein M1stands for one or more divalent elements, M2stands for one or more trivalent elements, M3stands for one or more tetravalent elements, M4stands for one or more pentavalent elements.3. The process of embodiment 1 or 2, wherein the one or more sources for a support material comprise, preferably consist of, one or more compounds selected from the group consisting of oxides, hydroxides, carbonates, nitrates, hydrogencarbonates, hydroxy carbonates, mixed metal oxides of M1and M2, mixed metal oxides of M1and M3, mixed metal oxides of M1and M4, mixed metal oxides of M2and M3, mixed metal oxides of M2and M4, mixed metal oxides of M3and M4, mixed metal hydroxy carbonates of M1and M2, mixed metal hydroxy carbonates of M1and M3, mixed metal hydroxy carbonates of M1and M4, mixed metal hydroxy carbonates of M2and M3, mixed metal hydroxy carbonates of M2and M4, mixed metal hydroxy carbonates of M3and M4, and mixtures of two or more thereof.4. The process of any one of embodiments 1 to 3, wherein the one or more sources for a support material comprise a source for M1O and a source for M22C>3.5. The process of embodiment 4, wherein the source for M1O and the source for M22C>3 comprise, preferably consist of, one or more compounds selected from the group consisting of mixed metal oxides of M1and M2, mixed metal hydroxy carbonates of M1and M2, and mixtures thereof.The process of embodiment 4 or 5, wherein the source for M1O and the source for M22O3 have a molar ratio of M1to M2in the range of from 1 :10 to 10:1.0, preferably in the range of from 1 :2.5 to 2.5:1 , more preferably in the range of from 1 :2 to 2:1 , more preferably in the range of from 1 :2.1 to 1 :1.9. The process of any one of embodiments 4 to 6, wherein the source for M1O and the source for M22O3 comprise from 10 to 34 weight-%, preferably from 25 to 31 weight-%, more preferably from 27 to 29 weight-%, of M1, calculated as M1O, based on the sum of the weights of M1, calculated as M1O, and M2, calculated as M22O3, comprised in the source for M1O and the source for M22O3. The process of any one of embodiments 4 to 7, wherein the source for M1O and the source for M22O3 comprise from 66 to 90 weight-%, preferably from 69 to 75 weight-%, more preferably from 71 to 73 weight-%, of M2, calculated as M22O3, based on the sum of the weights of M1, calculated as M1O, and M2, calculated as M22O3, comprised in the source for M1O and the source for M22O3. The process of any one of embodiments 1 to 8, wherein the support material is selected from the group consisting of M1O, M22O3, M3C>2, M Os, M1M22C>4, and mixtures of two or more thereof, preferably from the group consisting of M1O, M22O3, and M1M22C>4, wherein the support material more preferably is M1M22C>4, wherein M1stands for one or more divalent elements, M2stands for one or more trivalent elements, M3stands for one or more tetravalent elements, M4stands for one or more pentavalent elements. The process of any one of embodiments 2 to 9, wherein M1is selected from groups 2, 10, 11 and 12 of the periodic table of elements, wherein M1is preferably selected from the group consisting of Mg, Ca, Ni, Cu, Zn, Mn, Co, and mixtures of two or more thereof, more preferably selected from the group consisting of Mg, Ni, Cu, Zn, and mixtures of two or more thereof, more preferably from the group consisting of Mg, Zn, Cu, and mixtures thereof, more preferably from the group consisting of Mg, Zn, and mixtures thereof, wherein M1more preferably is Mg. The process of any one of embodiments 2 to 10, wherein M2is selected from groups 5, 6, 7, 8 and 13 of the periodic table of elements, wherein M2is preferably selected from the group consisting of Al, Ga, In, Cr, Fe, V, Mn, Co, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, Cr, Fe, V, Mn, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, V,Mn, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, and mixtures of two or more thereof, wherein M2more preferably is Al.12. The process of any one of embodiments 2 to 11 , wherein M3is selected from groups 4, and 14 of the periodic table of elements, wherein M3is preferably selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Ce and mixtures of two or more thereof, wherein M3is more preferably selected from the group consisting of Si, Ti, Zr, Hf, Ce, and mixtures of two or more thereof.13. The process of embodiment 12, wherein M3does not comprise carbon.14. The process of any one of embodiments 2 to 13, wherein M4is selected from group 5 of the periodic table of elements, wherein M4is preferably selected from the group consisting of V, Nb, Ta, and mixtures of two or more thereof.15. The process of any one of embodiments 1 to 14, wherein the molding obtained from (ii) exhibits an X-ray diffraction pattern comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, more preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, wherein M1is more preferably Mg and wherein M2is more preferably Al. The process of any one of embodiments 1 to 15, wherein the molding obtained from (ii) has a water adsorption in the range of from 25 to 70 weight-%, preferably in the range of from 37 to 47 weight-%, more preferably in the range of from 40 to 44 weight-%, wherein the water adsorption is preferably determined according to Reference Example 1.1. The process of any one of embodiments 1 to 16, wherein the molding obtained from (ii) has a BET specific surface area in the range of from 35.0 to 100.0 m2 / g, preferably in the range of from 40.0 to 60.0 m2 / g, more preferably in the range of from 45.0 to 55.0 m2 / g, wherein the BET specific surface area is preferably determined according to Reference Example 1.3. The process of any one of embodiments 1 to 17, wherein the molding obtained from (ii) has a total pore volume in the range of from 0.20 to 0.7 ml / g, preferably in the range of from 0.30 to 0.42 ml / g, more preferably in the range of from 0.33 to 0.39 ml / g, wherein the total pore volume is preferably determined according to Reference Example 1.4. The process of any one of embodiments 1 to 18, wherein molding the mixture according to (i) comprises tableting or extruding. The process of any one of embodiments 1 to 19, wherein calcining according to (ii) is conducted at a temperature in the range of from 300 to 1400 °C, preferably in the range of from 700 to 1100 °C, more preferably in the range of from 900 to 1000 °C. The process of any one of embodiments 1 to 20, wherein calcining according to (ii) is conducted for a period of time in the range of from 0.1 to 48 h, preferably in the range of from 0.5 to 24 h, more preferably in the range of from 1 to 12 h.22. The process of any one of embodiments 1 to 21, wherein the gas atmosphere according to (ii) comprises, preferably consists of, one or more of oxygen and nitrogen, preferably air.23. The process of any one of embodiments 1 to 22, further comprising (ii’) treating the molding obtained from (ii) with an acid.24. The process of embodiment 23, wherein treating according to (ii’) comprises immersing the molding in the acid.25. The process of embodiment 23 or 24, wherein treating according to (ii’) is conducted for a period of time in the range of from 10 to 400 minutes, preferably in the range of from 45 to 75 minutes, more preferably in the range of from 55 to 65 minutes.26. The process of any one of embodiments 23 to 25, wherein treating according to (ii’) is conducted at a temperature in the range of from 0 to 75 °C, preferably in the range of from 10 to 40 °C, more preferably in the range of from 15 to 35 °C.27. The process of any one of embodiments 23 to 26, wherein the acid according to (ii’) is an aqueous acid.28. The process of embodiment 27, wherein the aqueous acid has a weight ratio of acid to water in the range of from 1 :1 to 1 :10, preferably in the range of from 1 :3 to 1:5, more preferably in the range of from 1:3.9 to 1 :4.1.29. The process of embodiment 27 or 28, wherein the aqueous acid has a concentration of acid in water in the range of from 2.5 to 4.5 mol / l, preferably in the range of from 3.2 to 3.7 mol / l, more preferably in the range of from 3.3 to 3.6 mol / l.30. The process of any one of embodiments 23 to 29, wherein the acid according to (ii’) comprises, preferably consists of, one or more of an inorganic acid and an organic acid, preferably one or more of HNO3, HCI, H2SO4, H3PO4, formic acid, oxalic acid, acetic acid, more preferably HNO3.31. The process of any one of embodiments 23 to 30, further comprising after (ii’) and prior to (iii), preferably after (ii’) and prior to (ii”)(ii’,1) washing the molding obtained from (ii’) with de-ionized water.32. The process of any one of embodiments 23 to 31 , further comprising after (ii’) and prior to (iii), preferably after (ii’,1) and prior to (iii), preferably after (ii’,1) and prior to (ii”),(ii’.2) drying the molding obtained from (ii’) or (ii’,1) in a gas atmosphere.33. The process of embodiment 32, wherein drying according to (ii’.2) is conducted at a temperature in the range of from 80 to 160 °C, preferably in the range of from 100 to 140 °C, more preferably in the range of from 110 to 130 °C.34. The process of embodiment 32 or 33, wherein drying according to (ii’.2) is conducted for a period of time in the range of from 0.5 to 20 h, preferably in the range of from 2 to16 h, more preferably in the range of from 3 to 12 h.35. The process of any one of embodiments 32 to 34, wherein the gas atmosphere according to (ii’.2) comprises, preferably consists of, one or more of oxygen and nitrogen, preferably air.36. The process of any one of embodiments 23 to 35, further comprising(ii”) calcining the molding obtained from (ii’), (ii’,1) or (ii’.2) in a gas atmosphere.37. The process of embodiment 36, wherein calcining according to (ii”) is conducted at a temperature in the range of from 400 to 1200 °C, preferably in the range of from 600 to 950 °C, more preferably in the range of from 825 to 875 °C.38. The process of embodiment 36 or 37, wherein calcining according to (ii”) is conducted for a period of time in the range of from 0.1 to 1.5 h, preferably in the range of from 0.3 to 0.7 h, more preferably in the range of from 0.4 to 0.6 h.39. The process of any one of embodiments 36 to 38, wherein the gas atmosphere according to (ii”) comprises, preferably consists of, one or more of oxygen and nitrogen, preferably air.40. The process of any one of embodiments 1 to 39, wherein treating according to (iii) is achieved by impregnation, more preferably by incipient wetness impregnation.41. The process of any one of embodiments 1 to 40, wherein treating according to (iii) is conducted for a period of time in the range of from 0.1 to 12 h, preferably in the range of from 0.15 to 9 h, more preferably in the range of from 0.2 to 6 h.42. The process of any one of embodiments 1 to 41, wherein treating according to (iii) is conducted at a temperature in the range of from 0 to 50 °C, preferably in the range of from 10 to 40 °C, more preferably in the range of from 15 to 35 °C.43. The process of any one of embodiments 1 to 42, wherein the source of Ru comprises, preferably consists of, one or more of a Ru nitrosyl salt, preferably Ru(NO)NOs, a Ru halide, preferably RuCh hydrate, and Ru acetate.44. The process of any one of embodiments 1 to 43, wherein the alkali metal is selected from the group consisting of Li, Na, K, Rb, Cs, and mixtures of two or more thereof, preferably from the group consisting of K, Cs, and mixtures of two or more thereof, wherein the alkali metal more preferably is K or Cs, wherein the alkali metal more preferably is K.45. The process of any one of embodiments 1 to 44, wherein the source of the alkali metal comprises, preferably consists of, one or more of an organic salt or an inorganic salt of the alkali metal, preferably one or more of an acetate, a nitrate, a halide, preferably an acetate or nitrate, of the alkali metal.46. The process of any one of embodiments 1 to 45, wherein the molar ratio of Ru, calculated as an element; to the alkali metal, calculated as sum of the one or more alkali metals as elements, in the aqueous solution according to (iii) is in the range of from 0.10:1 to 1.00:1 , preferably in the range of from 0.20:1 to 0.50:1, more preferably in the range of from 0.25:1 to 0.45:1.47. The process of any one of embodiments 1 to 46, wherein in (iii) the aqueous solution further comprises an acid, wherein the acid comprises, preferably consists of, one or more of an inorganic acid and an organic acid, preferably one or more of HNO3, HCI, H2SO4, H3PO4, formic acid, oxalic acid, acetic acid, more preferably HNO3.48. The process of embodiment 47, wherein the aqueous solution has a weight ratio of acid to water in the range of from 1:1 to 1 :10, preferably in the range of from 1:3 to 1 :5, more preferably in the range of from 1 :3.9 to 1 :4.1.49. The process of any one of embodiments 1 to 48, further comprising(iv) drying the molding obtained from (iii) in a gas atmosphere, wherein drying is preferably conducted at a temperature in the range of from 80 to 220 °C, preferably from 90 to 200 °C, more preferably from 100 to 180 °C, wherein the gas atmosphere preferably comprises one or more of nitrogen and oxygen, more preferably air.50. The process of any one of embodiments 1 to 49, further comprising(v) activating the molding obtained from (iii) or (iv) in a gas atmosphere comprising hydrogen, wherein activating is conducted at a temperature in the range of from 200 to 400 °C, preferably from 240 to 360 °C, wherein activating is conducted for a time period in the range of from 0.1 to 48 h, preferably from 0.5 to 36 h, wherein the gas atmosphere preferably comprises an inert gas, wherein the inert gas preferably is one or more of Ar and N2, more preferably N2, wherein the gas atmosphere more preferably comprises from 0.01 to10 volume-%, more preferably from 0.5 to 6 volume-% of H2, preferably of H2 in the inert gas.51 . A catalytic material obtained or obtainable by the process of any one of embodiments 1 to 50.52. The catalytic material of embodiment 51 , comprising Ru, an alkali metal and a support material, wherein Ru and the alkali metal are supported on the support material.53. The catalytic material of embodiment 52, wherein the support material is selected from the group consisting of M1O, M22O3, M3C>2, M Os, M1M22C>4, and mixtures of two or more thereof, preferably from the group consisting of M1O, M22O3, and M1M22C>4, wherein the support material more preferably is M1M22C>4, wherein M1stands for one or more divalent elements, M2stands for one or more trivalent elements, M3stands for one or more tetravalent elements, M4stands for one or more pentavalent elements.54. The catalytic material of embodiment 52 or 53, wherein the support material comprises a crystalline phase having a spinel structure, wherein the crystalline phase having a spinel structure is preferably determined according to Reference Example 1.2.55. The catalytic material of embodiment 54 or 55, wherein M1is selected from groups 2, 10,11 and 12 of the periodic table of elements, wherein M1is preferably selected from the group consisting of Mg, Ca, Ni, Cu, Zn, Mn, Co, and mixtures of two or more thereof, more preferably selected from the group consisting of Mg, Ni, Cu, Zn, and mixtures of two or more thereof, more preferably from the group consisting of Mg, Zn, Cu, and mixtures thereof, more preferably from the group consisting of Mg, Zn, and mixtures thereof, wherein M1more preferably is Mg.56. The catalytic material of any one of embodiments 53 to 55, wherein M2is selected from groups 5, 6, 7, 8 and 13 of the periodic table of elements, wherein M2is preferably selected from the group consisting of Al, Ga, In, Cr, Fe, V, Mn, Co, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, Cr, Fe, V, Mn, La, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, V, Mn, and mixtures of two or more thereof, more preferably selected from the group consisting of Al, La, and mixtures of two or more thereof, wherein M2more preferably is Al.57. The catalytic material of any one of embodiments 53 to 56, wherein M3is selected from groups 4, and 14 of the periodic table of elements, wherein M3is preferably selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Ce and mixtures of two or more thereof, wherein M3is more preferably selected from the group consisting of Si, Ti, Zr, Hf, Ce and mixtures of two or more thereof.58. The catalytic material of any one of embodiments 53 to 57, wherein M4is selected from group 5 of the periodic table of elements, wherein M4is preferably selected from the group consisting of V, Nb, Ta, and mixtures of two or more thereof.59. The catalytic material of any one of embodiments 53 to 58, comprising from 0.5 to 5.0 weight-%, preferably from 2.0 to 4.0 weight-%, more preferably from 2.4 to 3.6 weight-%, more preferably from 2.6 to 3.4 weight-%, more preferably from 3.0 to 3.4 weight-%, of the alkali metal, calculated as element, based on the sum of the weights of the one or more divalent elements M1, calculated as M1O, the one or more trivalent elements M2, calculated as M220a, the one or more tetravalent elements M3, calculated as M3O2, the one or more pentavalent elements M4, calculated as M Os.60. The catalytic material of any one of embodiments 53 to 59, comprising from 0.5 to 5 weight-%, preferably from 1 .0 to 3.0 weight-%, more preferably from 1 .4 to 2.6 weight-%, more preferably from 1 .6 to 2.4 weight-%, more preferably from 1 .8 to 2.2 weight-%, of Ru, calculated as element, based on the sum of the weights of the one or more divalent elements M1, calculated as M1O, the one or more trivalent elements M2, calculated as M220a, the one or more tetravalent elements M3, calculated as M3O2, the one or more pentavalent elements M4, calculated as M Os.61 . The catalytic material of any one of embodiments 52 to 60, wherein the alkali metal is selected from the group consisting of Li, Na, K, Rb, Cs, and mixtures of two or more thereof, preferably from the group consisting of K, Cs, and mixtures of two or more thereof,wherein the alkali metal more preferably is K or Cs, wherein the alkali metal more preferably is K. The catalytic material of any one of embodiments 52 to 61 , wherein the support material has a total pore volume in the range of from 0.10 to 0.90 ml / g, preferably in the range of from 0.18 to 0.75 ml / g, more preferably in the range of from 0.25 to 0.60 ml / g, more preferably in the range of from 0.33 to 0.53 ml / g, more preferably in the range of from 0.37 to 0.49 ml / g, more preferably in the range of from 0.40 to 0.46 ml / g, wherein the total pore volume is preferably determined according to Reference Example 1.4. The catalytic material of any one of embodiments 52 to 62, wherein the support material has a crystallinity in the range of 50 to 100 %, preferably of 60 to 100 %, more preferably of 70 to 95 %, more preferably of 80 to 90 %, wherein the crystallinity is preferably determined according to Reference Example 1 .2. The catalytic material of embodiment 63, wherein from 50 to 100 %, preferably from 70 to 100 %, more preferably from 95 to 100 %, of the crystalline phase has the spinel structure as determined by XRD, preferably as determined according to Reference Example 1.2. The catalytic material of any one of embodiments 52 to 64, wherein the catalytic material exhibits an X-ray diffraction pattern comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, more preferably comprising at least the following reflections:wherein 100 % relates to the intensity of the maximum peak in the X-ray powder diffraction pattern, wherein the X-ray diffraction pattern is preferably determined according to Reference Example 1.2, wherein M1is more preferably Mg and wherein M2is more preferably Al. The catalytic material of any one of embodiments 52 to 65, wherein the support material has a median pore diameter in the range of from 0.001 to 0.1 pm, preferably in the range of from 0.005 to 0.05 pm, more preferably in the range of from 0.02 to 0.04 pm, more preferably in the range of from 0.027 to 0.035 pm, more preferably in the range of from 0.028 to 0.034 pm, wherein the pore size distribution is preferably determined according to Reference Example 1.5. The catalytic material of any one of embodiments 52 to 66, wherein the support material has a water adsorption in the range of from 10 to 80 weight-%, preferably in the range of from 30 to 60 weight-%, more preferably in the range of from 40 to 50 weight-%, more preferably in the range of from 43 to 47 weight-%, wherein the water adsorption is preferably determined according to Reference Example 1.1. The catalytic material of any one of embodiments 52 to 67, wherein the support material has a BET specific surface area in the range of from 20.0 to 150.0 m2 / g, preferably in the range of from 30.0 to 90.0 m2 / g, more preferably in the range of from 40.0 to 65.0 m2 / g, more preferably in the range of from 45.0 to 55.0 m2 / g, wherein the BET specific surface area is preferably determined according to Reference Example 1 .3. The catalytic material of any one of embodiments 52 to 68, wherein the Ru is homogeneously dispersed throughout the catalytic material.70. The catalytic material of any one of embodiments 52 to 69, wherein the alkali metal M3is homogeneously dispersed throughout the catalytic material.71 . The catalytic material of any one of embodiments 52 to 70, wherein from 85 to 100 weight-%, preferably from 90 to 100 weight-%, more preferably from 95 to 100 weight-%, more preferably from 98 to 100 weight-%, more preferably from 99 to 100 weight-%, more preferably from 99.9 to 100 weight-%, of the catalytic material consist of the support material, Ru, and the alkali metal.72. The catalytic material of any one of embodiments 51 to 71 , being in the form of an extrudate, a tablet, or a granule.73. The catalytic material of embodiment 72, wherein the extrudate or the tablet has a crosssection, wherein the cross-section is circular, hexagonal, rectangular, quadratic, triangular, oval, a star-shaped polygon, or cloverleaf-shaped, preferably circular, hexagonal, rectangular, quadratic, triangular, oval, a star-shaped polygon having 3, 4, 5, 6, 7, or 8 tips, a trilobe, a quadrilobe or a hexalobe, more preferably circular, hexagonal, rectangular, quadratic, triangular, oval, a star-shaped polygon having 3 or 4 tips, a trilobe, a quadrilobe or a hexalobe.74. The catalytic material of any one of embodiments 51 to 73, wherein the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a quadrilobe.75. The catalytic material of embodiment 74, wherein the tablet has a thickness, wherein the thickness is in the range of from 2.0 to 13.0 mm, preferably in the range of from 5.0 to 10.0 mm, more preferably in the range of from 6.5 to 9.0 mm.76. The catalytic material of embodiment 74 or 75, wherein the tablet has a diameter D in the range of from 5 to 20 mm, preferably in the range of from 7 to 17 mm, more preferably in the range of from 9 to 15 mm.77. The catalytic material of any one of embodiments 51 to 76, wherein the catalytic material is in the form of a tablet having a cross-section, wherein the cross-section is a hexalobe.78. The catalytic material of embodiment 77, wherein the tablet has a thickness, wherein the thickness is in the range of from 2.0 to 15.0 mm, preferably in the range of from 5.0 to 12.0 mm, more preferably in the range of from 8.0 to 9.0 mm.79. The catalytic material of embodiment 77 or 78, wherein the tablet has a diameter D in the range of from 5 to 25 mm, preferably in the range of from 12 to 19 mm, more preferably in the range of from 14 to 17 mm.80. The catalytic material of embodiment 72, wherein the catalytic material is in the form of an extrudate having a cross-section, wherein the cross-section is circular or a star-shaped polygon or a trilobe.81 . The catalytic material of embodiment 80, wherein the extrudate has a thickness, wherein the thickness is in the range of from 1.0 to 12.0 mm, preferably in the range of from 1.5 to 10.0 mm, more preferably in the range of from 2.0 to 8.0 mm.82. The catalytic material of embodiment 80 or 81 , wherein the extrudate has a diameter, wherein the diameter is in the range of from 1 to 20 mm, preferably in the range of from 2 to 18 mm, more preferably in the range of from 3 to 16 mm.83. A process for converting NH3 to H2 and N2, the process comprising(A) providing a reactor containing a catalytic material according to any one of embodiments 51 to 82;(B) preparing a feed gas stream comprising NH3;(C) feeding the feed gas stream prepared in (B) into the reactor provided in (A) and contacting the feed gas stream with the catalytic material, wherein contacting is performed at a pressure of greater than 10 bara, and at a temperature in the range of from 200 to 650 °C;(D) removing an effluent gas stream from the reactor, the effluent gas stream comprising H2 and N2.84. The process of embodiment 83, wherein contacting is performed at a pressure in the range of from 11 to 50 bara, preferably of from 15 to 40 bara, more preferably of from 19 to 31 bara.85. The process of embodiment 83 or 84, wherein contacting is performed at a temperature in the range of from 250 to 650 °C, preferably of from 275 to 625 °C, and more preferably of from 300 to 600 °C.86. The process of any one of embodiments 83 to 85, wherein the feed gas stream prepared in (B) comprises from 1 to 100 vol.-% of NH3, preferably from 3 to 99.99 vol.-%, more preferably from 5 to 99.95 vol.-%, more preferably from 10 to 99.9 vol.-%, more preferablyfrom 20 to 99.8 vol.-%, more preferably from 30 to 99.7 vol.-%, more preferably from 40 to 99.6 vol.-%, and more preferably from 50 to 99.5 vol.-%.87. The process of any one of embodiments 83 to 86, wherein the feed gas stream prepared in (B) comprises from 0 to 50 vol.-% of N2, preferably from 0.01 to 30 vol.-%, more preferably from 0.03 to 15 vol.-%, more preferably from 0.05 to 5 vol.-%, more preferably from 0.1 to 1 vol.-%, more preferably from 0.12 to 0.5 vol.-%, and more preferably from 0.14 to 0.16 vol.-%.88. The process of any one of embodiments 83 to 87, wherein the feed gas stream prepared in (B) comprises from 0 to 75 vol.-% of H2, preferably from 0 to 60 vol.-%, more preferably from 0 to 50 vol.-%, more preferably from 0 to 40 vol.-%, more preferably from 0 to 35 vol.-%, and more preferably from 0 to 30 vol.-%.89. The process of any one of embodiments 83 to 88, wherein the feed gas stream prepared in (B) comprises from 100 to 50,000 ppmv of H2O, preferably from 200 to 30,000 ppmv, more preferably from 500 to 25,000 ppmv, more preferably from 500 to 20,000 ppmv, more preferably from 500 to 15,000 ppmv, more preferably from 750 to 15,000 ppmv, more preferably from 1 ,000 to 11 ,000 ppmv, more preferably from 1 ,000 to 10,000 ppmv, more preferably from 2,000 to 8,000 ppmv, more preferably from 3,000 to 7,500 ppmv, more preferably from 4,500 to 7,000 ppmv, more preferably from 5,000 to 6,500 ppmv.90. The process of any one of embodiments 83 to 89, wherein the total amount of NH3, N2, and H2 comprised in the feed gas stream prepared in (B) is in the range from 90 to 100 wt.-%, preferably from 95 to 99.95 vol.-%, more preferably from 98 to 99.9 vol.-%, more preferably from 99 to 99.85 vol.-%, and more preferably from 99.7 to 99.8 vol.-%.91 . The process of any one of embodiments 83 to 90, wherein the feed stream is fed into the reactor at a gas hourly space velocity in the range of from 500 to 20,000 h’1, preferably of from 500 to 16,000 h’1, more preferably of from 700 to 14,000 h’1, more preferably of from 800 to 12,000 h’1, more preferably of from 900 to 10,000 h’1, more preferably of from1 ,000 to 8,000 h’1, and more preferably of from 3,000 to 5,000 h’1.92. Use of a catalytic material according to any one of embodiments 51 to 82 for converting NH3 to H2 and N2.93. A process, preferably the process according to any one of embodiments 83 to 91 , comprising the step of converting the H2 obtainable or obtained according to (D) as described in any one of embodiments 83 to 91 , to obtain a product Q.94. The process of embodiment 93, wherein the product Q is selected from: building block or monomer; or polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or cleaning polymer, cleaning surfactant, descaling compound, cleaning biocide or composition or formulation thereof; or agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth) acrylate hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; or cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate.95. The process of embodiment 93 or 94, wherein the content of H2 obtainable or obtained according to (D) as described in any one of embodiments 83 to 91 in the product Q is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or wherein the content of H2 obtainable or obtained according to (D) as described in any one of embodiments 83 to 91 in the product Q is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; andpreferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and embodiment chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.The present invention is further illustrated by the following examples, comparative examples and reference examples.EXPERIMENTAL SECTIONReference Example 1 : Determination methodsReference Example 1.1 : Determination of water adsorptionA dried molding was placed in water such that it was fully immersed. The molding stayed 60 minutes in water. After that, the outer surface of the molding was dried and the weight of the molding was determined. The water uptake (also designated as water adsorption) in weight-% was calculated according to formula I: water uptake = (weight of wet molding - weight of dried molding) I weight of dried molding (I).Reference Example 1.2: X-ray powder diffraction and determination of the crystallinityPowder X-ray diffraction (PXRD) data was collected using a diffractometer (D8 Advance Series II, Bruker AXS GmbH) equipped with a LYNXEYE detector operated with a Copper anode X-ray tube running at 40 kV and 40 mA. The geometry was Bragg-Brentano, and air scattering was reduced using an air scatter shield.Computing crystallinity: The crystallinity of the samples was determined using the software DIF- FRAC.EVA provided by Bruker AXS GmbH, Karlsruhe, according to the method which is described on page 121 of the user manual. The default parameters for the calculation were used.Computing phase composition: The phase composition was computed against the raw data using the modelling software DIFFRAC. TOPAS provided by Bruker AXS GmbH (User Manual for DIFFRAC. TOPAS Version 6, 2017, Bruker AXS GmbH, Karlsruhe). The crystal structures of the identified phases, instrumental parameters as well the crystallite size of the individual phaseswere used to simulate the diffraction pattern. This was fit against the data in addition to a function modelling the background intensities.Data collection: The samples were homogenized in a mortar and then pressed into a standard flat sample holder provided by Bruker AXS GmbH for Bragg-Brentano geometry data collection. The flat surface was achieved using a glass plate to compress and flatten the sample powder. The data was collected from the angular range 2 to 70 °2Theta with a step size of 0.02 °2Theta, while the variable divergence slit was set to an angle of 0.1 °. The crystalline content describes the intensity of the crystalline signal to the total scattered intensity.Reference Example 1.3: Determination of BET specific surface areaThe BET specific surface area was determined via nitrogen physisorption at 77 K according to the method disclosed in DIN 66131.Reference Example 1.4: Determination of total pore volumeThe total pore volume was determined via intrusion mercury porosimetry according to DIN 66133. To this effect, a MicroActive AutoPore V 9600 was applied.Reference Example 1.5: Determination of pore size distributionThe pore size distribution was determined via intrusion mercury porosimetry according to DIN 66133. To this effect, a MicroActive AutoPore V 9600 was applied.Reference Example 2.1 : Preparation of a support materialPural Mg 30 (comprising Mg, calculated as MgO, and Al, calculated as AI2O3, in a weight ratio of 30:70) quadrilobes were calcined at 950 °C for 3 h in air.Reference Example 2.2: Acid treatment of the support materialThe calcined quadrilobes obtained in Reference Example 2.1 were treated with nitric acid as follows. The calcined quadrilobes were placed in a glass beaker, which was then filled with an aqueous HNCh-containing solution (20 weight-% concentration, corresponding to 3.3 mol / l). All tablets were fully covered by said acidic solution. After 60 minutes, the acidic solution was removed and the obtained quadrilobes washed with demineralized water. The quadrilobes weredried at 120 °C for 4 h (heating rate of 5 °C / min). After the drying step, a calcination step for removing residual nitrates was conducted at 850 °C for 0.5 h (heating rate of 5 °C / min). The characteristics of the molding before and after the acid treatment are noted in Table 1 below.The water uptake was determined according to Reference Example 1.1 , the total pore volume according to Reference Example 1.4, the median pore diameter according to Reference Example 1.5, and the BET specific surface area according to Reference Example 1.3.Table 1Characteristics of the Rural Mg 30 quadrilobes prior to and after treatment with aqueous HNO3- containing solution.Comparative Example 3: Preparation of a catalytic material comprising Ru and K20 g of the acid-treated support material prepared according to Reference Example 2.2 as molding were impregnated with an aqueous solution comprising 2.173 g of Ru(NO)(NOa)3 (corresponding to 19.5 weight-% Ru in the aqueous solution). 95 % of the pore volume based on water-uptake (determined according to Reference example 1) was targeted for the impregnation and thus the Ru(NO)(NOs)3 aqueous solution was further diluted with aqueous NO3 (20 % HNO3 in water). After drying at 180 °C for 4 h, the Ru containing moldings were impregnated with 1 .859 g of potassium acetate (K(CH3COO)) dissolved in demineralized water to fill the pore volume based on water-uptake (determined according to Reference example 1) by 90 %. The resulting material was then dried at 120 °C for 2 h.Example 4: Preparation of a catalytic material comprising Ru and K10 g of the acid-treated support material prepared according to Reference Example 2.2 as molding were impregnated with an aqueous solution comprising Ru and K. The aqueous solution comprising Ru and K was prepared by dissolving 0.930 g of potassium acetate (K(CH3COO)) in an aqueous solution comprising 1.086 g of Ru(NO)(NOs)3 (corresponding to19.5 weight-% Ru in the aqueous solution). The resulting aqueous solution comprising Ru and K was further diluted with aqueous HNO3 (20 % HNO3 in water) for impregnating 95 % of the pore volume based on water-uptake (determined according to Reference example 1). After drying at 120 °C for 2h, the resulting catalytic material was further thermally treated at 180 °C for 4 h.Example 5: Preparation of a catalytic material comprising Ru and K10 g of the non-acid treated support material were prepared according to Reference Example 2.1. The catalytic material was then prepared by impregnating said non-acid treated support material with an aqueous solution comprising Ru and K according to the procedure of Example 4.Example 6: Catalytic tests in NHs-reforming under high pressurePrior to testing, the catalytic materials according to Comparative Example 3 and Examples 4 and 5 were activated in a reducing atmosphere of 5 % H2 in Ar at a temperature of 300 °C (dwell time 1 h, heating rate 2 °C / min). After activating the catalysts, a feed stream was applied (see tables below, NH3 + H2O + 5 volume-% of Ar). In the respective tests, the pressure of NH3 (p(NHs)) was set to 30 bara. The gas hourly space velocity (GHSV) with respect to the NH3 content was set to 4.000 h’1. The temperatures were varied between 300 and 650 °C.Table 1 shows the results from the experiment at a gas hourly space velocity (GHSV) of 4,000 h-1at a pressure p(NHs) of 30 bara for the catalysts from Comparative Example 3 and Example 4, respectively, wherein the feed further comprised 5,000 ppmv of H2O and 5 volume-% Ar. The catalysts were tested between 300 and 650 °C. The temperature was increased in steps of 50 °C. The NHs-conversion is given in %. The results for Comparative Example 3 and Example 4 are shown in Figure 1. As may be taken from the results from testing displayed in Figure 1 , at 550 °C the catalysts approached equilibrium conversion, wherein the comparatively more active catalyst according to Example 4 approaches equilibrium conversion already at 500 °C.Table 1 :Results for the conversion of ammonia over the Ru-based catalysts of Comparative Example 3 and Examples 4 and 5.Thus, as may be taken from the results from catalytic testing of the respective catalytic materials of Comparative Example 3 and Examples 4 and 5, the catalytic material according to the present invention affords a highly effective decomposition of ammonia at high pressures. Thus, an improved process for converting NH3 to H2 and N2 can be provided, in particular allowing a highly effective decomposition of ammonia at high pressures when using a catalytic material according to the present invention.Furthermore, it has been surprisingly found that also a highly effective decomposition at low temperatures for Examples 4 and 5 can be afforded, in particular despite the high pressure involved. Moreover, it has surprisingly been found that the highly effective decomposition at low temperatures is even better for the catalytic material of Example 4, which comprises a support material that has been subjected to an acid treatment, compared to the catalytic material of Example 5, for which said acid treatment of the support material is not performed. In addition thereto, it has quite unexpectedly been found that the catalytic material according to the present invention can also afford a highly effective process despite the harsh hydrothermal conditions under high pressure due to water present in the ammonia decomposition reaction when using industrial grade ammonia which contains small amounts of water for stabilization purposes.Brief description of figuresFigure 1 : displays the results of NH3 reforming determined according to Example 6 for the catalytic materials according to Comparative Example 3 and Example 4, wherein the NHs-conversion is given in % on the ordinate and the temperature in °C on the abscissa.Cited literature:K. Lamb et. al. in Int. J. of Hydrogen Energy 2019, 44, 3726-3736- A. Di Carlo et al. in Int. J. of Hydrogen Energy 2014, 39, 808-814- T.A. Le et al. in Korean J. Chem. Eng. 2021, 38(6), 1087-1103M. Miyamoto et al. in Int. J. of Hydrogen Energy 2018, 43, 730-738B. Lorenzut et al. in ChemCatChem 2010, 2, 1096 - 1106- Z. Wang et al. in Int. J. of Hydrogen Energy 2019, 44, 7300-7307- WO 2015 / 086639 A2- WO 2018 / 046393 A 1S.-F. Yin et al. in Applied Catalysis B Environmental 2004, 48, 237-241S. Sayas et al. in Catal. Sci. Technol. 2020, 10, 5027-5035- GB 1377191 A

Claims

Claims1. Process for preparing a catalytic material, the process comprising(i) molding a mixture comprising one or more sources for a support material;(ii) calcining the molding obtained from (i) in a gas atmosphere, obtaining a molding comprising a support material;(iii) impregnating the molding with an aqueous solution comprising both a source of Ru and a source of an alkali metal.

2. The process of claim 1 , further comprising after (ii) and prior to (iii) (ii’) treating the molding obtained from (ii) with an acid.

3. The process of claim 2, wherein treating according to (ii’) comprises immersing the molding in the acid.

4. The process of claim 2 or 3, wherein treating according to (ii’) is conducted for a period of time in the range of from 10 to 400 minutes.

5. The process of any one of claims 2 to 4, wherein the acid according to (ii’) is an aqueous acid.

6. The process of claim 5, wherein the aqueous acid has a concentration of acid in water in the range of from 2.5 to 4.5 mol / l.

7. The process of any one of claims 2 to 6, further comprising after (ii’) and prior to (iii) (ii’,1) washing the molding obtained from (ii’) with de-ionized water.

8. The process of any one of claims 2 to 7, further comprising after (ii’) and prior to (iii) (ii’.2) drying the molding obtained from (ii’) or (ii’,1) in a gas atmosphere.

9. The process of any one of claims 1 to 8, wherein the source of Ru comprises one or more of a Ru nitrosyl salt, a Ru halide, and Ru acetate.

10. The process of any one of claims 1 to 9, wherein the alkali metal is selected from the group consisting of Li, Na, K, Rb, Cs, and mixtures of two or more thereof.

11. The process of any one of claims 1 to 10, wherein the molar ratio of Ru, calculated as an element, to the alkali metal, calculated as sum of the one or more alkali metals as elements, in the aqueous solution according to (iii) is in the range of from 0.10:1 to 1.00:1.

12. A catalytic material obtained or obtainable by the process of any one of claims 1 to 11.

13. A process for converting NH3 to H2 and N2, the process comprising (A) providing a reactor containing a catalytic material according to claim 11 ;(B) preparing a feed gas stream comprising NH3;(C) feeding the feed gas stream prepared in (B) into the reactor provided in (A) and contacting the feed gas stream with the catalytic material, wherein contacting is performed at a pressure of greater than 10 bara, and at a temperature in the range of from 200 to 650 °C;(D) removing an effluent gas stream from the reactor, the effluent gas stream comprising H2 and N2.

14. Use of a catalytic material according to any one of claims 11 for converting NH3 to H2 and N2.

15. A process comprising the step of converting the H2 obtainable or obtained according to(D) as described in claim 13, to obtain a product Q.

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