841 results about "Palladium" patented technology

The invention provides a method and system for detecting the content of platinum, palladium and rhodium in an automobile exhaust purification catalyst and application, and relates to the technical field of automobile exhaust purification, the method comprises the following steps: crushing, grinding, sieving, performing microwave acidolysis, neutralizing, washing and drying a catalyst sample to obtain dry filter residues; a trapping agent and a fluxing agent are added into the dry filter residues, constant-temperature heating is conducted in inert gas, then cooling forming is conducted, and an alloy button is obtained; blowing ash on the alloy, then adding mixed acid into the alloy, heating the alloy in a water bath at 95 DEG C for 25-35 minutes to obtain a dissolved solution, then adding a masking agent into the dissolved solution, and oscillating to obtain a solution to be detected; and filtering the liquid to be detected, fixing the volume and detecting. According to the method, precise quantification of trace platinum, palladium and rhodium in the complex matrix catalyst can be realized, and the method has a relatively high recovery rate; meanwhile, pollution elements are prevented from being used, and the method is green and efficient and better conforms to the concept of green chemistry.

The present disclosure includes mixed metal catalysts, including electrocatalysts, which can be applied to reduce the need for Ir, while exhibiting desirable performance. Mixed metal electrocatalyst materials on the invention catalysts comprising Ir, Ru and Pd, catalysts comprising Ru and Pd, and catalysts comprising Ir and Pd.

The invention discloses a process and equipment for recovering platinum and palladium from a petroleum catalyst, and relates to the field of metal material recovery, carbon-supported platinum group noble metals platinum and palladium are recovered by using the patent technology, firstly, fine grinding, hydrolysis and filtration are performed, then a reducing agent is adopted for reduction, then acidification and filtration are performed to remove base metals, and hydrochloric acid and nitric acid solutions are adopted for leaching and saltpeter removal, so that the platinum and palladium are recovered. The high-purity palladium powder is prepared from the solution subjected to platinum precipitation through ammonium chloride platinum precipitation, ammonium chloroplatinate hydrazine hydrate reduction, high-purity platinum powder and ammonia water palladium precipitation and hydrazine hydrate reduction, the purposes of saving energy and reducing the production cost are achieved, the ashing roasting furnace is adopted for static ashing, the technology process is simplified, the platinum group precious metal recovery rate is high, and the smelting cost is low. And the quality and purity of the platinum-palladium product are high, the metal recovery rate is high, and the smelting cost is low.

Disclosed herein is a catalyst including a multicomponent alloy including a seed and al least four elements. The seed includes at least one platinum group metal, wherein the platinum group metal includes platinum, ruthenium, iridium, palladium, or rhodium. Methods of preparing the catalyst are also provided herein.

A sensor comprising one or more metal oxides as sensor material is used to detect pathogen-derived VOCs, such as those released from an infected wound. The metal oxides can comprise one or more metal elements selected from aluminum, antimony, bismuth, boron, cerium, chromium, cobalt, copper, gold, indium, iridium, iron, lanthanum, lead, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rhodium, ruthenium, selenium, silicon, silver, tantalum, tellurium, terbium, tin, titanium, tungsten, vanadium, ytterbium, yttrium, zinc, and zirconium. The sensor device can have one or more sensors that detect and record various VOCs indicative of the presence of pathogens, which are associated with mortality and / or infection.

The invention relates to the technical field of precious metal recovery, in particular to a process for separating precious metal from copper-nickel smelting waste, which comprises the following steps: crushing and grading the waste, adding a sulfuric acid solution containing etidronic acid, leaching, and washing, drying and crushing filter residues to obtain a pretreated material; mixing the pretreated material with a sodium peroxide-sodium carbonate composite flux, roasting, leaching with water, and filtering to obtain a filter residue B; adding a leaching agent containing hydrochloric acid, sodium chlorate and 1, 2-cyclohexanediamine tetraacetic acid into the filter residue B according to the ratio of 1: 3-1: 5, and filtering to obtain filtrate C and filter residue C; adjusting the pH value of the filtrate C to 1.5-2.5, adding an ethanol solution of sodium N, N-diethyldithiocarbamate, precipitating, washing and calcining to obtain sponge palladium; adding ammonium chloride into the filtrate D, precipitating and calcining to obtain sponge platinum; and leaching the filter residue C by using a hydrochloric acid-chloroauric acid mixed solution containing diphenylthiourea, and replacing and calcining zinc powder to obtain crude gold. According to the process, the leaching rates of platinum, palladium and gold and the product purity are greatly improved; flux and reagent systems are optimized, consumption and energy consumption are reduced, waste liquid treatment is matched for up-to-standard discharge, and efficient resource recovery and environment-friendly cooperation are achieved.

The invention discloses a comprehensive treatment method of platinum and palladium slag, and relates to the technical field of non-ferrous metal metallurgy. After the platinum and palladium slag is subjected to sulfating roasting, flue gas is introduced into a selenium absorption tower; hydrolyzing the roasting slag, reducing the dissolving solution to recover tellurium, and enabling the dissolving solution to enter a copper recovery process after tellurium precipitation; the dissolving slag is subjected to chlorination dissolution gold separation, and the gold separation slag is subjected to silver recovery; the gold separation liquid is reduced to obtain gold powder; carrying out platinum and palladium precipitation on the gold reduced solution, adding ammonia water into platinum and palladium precipitation to carry out platinum and palladium separation, respectively refining the separated platinum and palladium, and recovering platinum and palladium; carrying out platinum-palladium reduction on the platinum-palladium precipitation post-solution to obtain platinum-palladium precipitation slag and a platinum-palladium reduction post-solution, and returning the platinum-palladium precipitation slag to the roasting process; and performing tellurium reduction on the platinum-palladium reduced liquid to obtain tellurium powder and tellurium reduced liquid, and enabling the tellurium reduced liquid to enter a wastewater treatment process. The method has the beneficial effects that selenium, tellurium, copper, gold, silver, platinum and palladium are separated and recycled step by step, the recycling rate is high, the wastewater treatment difficulty is small, and environmental pollution is reduced.

The invention discloses a method for electrocatalytic hydrogenation dehalogenation of haloacetic acid or halomethane in a water body, which is characterized in that a conductive material of which the surface is modified with ruthenium or platinum is used as a catalytic cathode, water is used as a hydrogen source, and the haloacetic acid or halomethane in the water body is subjected to electrochemical hydrogenation dehalogenation to form acetic acid or methane. The price of precious metal in the catalytic cathode is lower, and the unit price of ruthenium is far lower than that of palladium and rhodium; and compared with a palladium-modified catalytic cathode, the dechlorination selectivity is higher, and the selectivity of hydrodechlorination of trichloroacetic acid into acetic acid in a water body is improved by 11.7%.

To provide a calcined body that is processed easier than a conventional calcined body and where differences in hardness between production lots are suppressed.SOLUTION: A calcined body comprises: at least one first transition metal element selected from the group consisting of manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), and silver (Ag); a coloring element of at least one of a lanthanoid rare earth element and a second transition metal element different in kind from the first transition metal element; and zirconia containing a stabilizing element. A content of the first transition metal element is 100 mass.ppm or more, a content of the second transition metal element is less than 100 mass.ppm, and an absolute value of a difference in hardness relative to a hardness of a calcined body obtained from a commercially available powder is 10 HV or less.SELECTED DRAWING: None

A method may include operating a dehydrogenation process whereby a hydrocarbon-containing feed is converted to light olefins, wherein the dehydrogenation process utilizes a fluidized process catalyst that circulates between a reactor and a combustor. The method may comprise withdrawing the process catalyst from the dehydrogenation process, modifying the process catalyst to form a modified catalyst, and adding the modified catalyst back to the dehydrogenation process. The process catalyst may include from 0.1 wt. % to 10 wt. % of one or more metals chosen from gallium, indium, thallium, or combinations thereof, from 1 ppmw to 1000 ppmw of one or more metals chosen from platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof, and at least 85 wt. % support. Modifying the process catalyst may include adding one or more of manganese, iron, chromium, or vanadium.

The invention discloses a method for recovering platinum and palladium from high-cobalt nickel-containing carbonylation slag, and relates to the technical field of non-ferrous metal carbonylation metallurgy, the method comprises the following steps: S1, hydrogen reduction and activation; s2, feeding into a high-pressure carbonylation reactor; and S3, efficient carbonylation. According to the method, the carbonylation slag is subjected to hydrogen reduction activation treatment, nickel protoxide and cobalt oxide are changed into simple substance nickel, the simple substance nickel is fed into a carbonylation reactor for carbonylation under the protection of reducing gas or inert gas after activation treatment, 95% of Ni, 85% of Fe and 80% of Co are carbonylated to enter a gas phase after carbonylation, bonding of cobalt and a platinum solid solution is broken through carbonylation, and the nickel-cobalt-cobalt-cobalt-cobalt alloy is obtained. Nickel protoxide is difficult to dissolve in various strong acids and oxidizing acids, and a foundation is laid for further separation of base metals and non-metallic element sulfur from precious metals to produce high-grade platinum concentrate.

Methods and systems for the electrochemical epoxidation of alkenes to generate an epoxide are described herein. Said methods and systems comprise: contacting an anode comprising an oxygen atom transfer electrocatalyst with an alkene in the presence of an electrolyte comprising water; applying a voltage to the anode and a cathode to generate the epoxide; wherein the oxygen atom transfer electrocatalyst comprises an at least partially oxidized palladium-platinum alloy characterized by the formula FX1: PdyPtzOx; wherein y is greater than 0 and less than 1; z is greater than 0 and less than 1; wherein the sum of y and z is equal to 1; and x is selected from the range of 0 to 2. The methods and systems disclosed herein comprise a significant advancement in the electrocatalytic epoxidation of alkenes in aqueous and mixed electrolytes using water as the oxygen atom transfer source.

The invention discloses a hydrogen energy fuel cell catalyst carrier based on a graphene graft polymer, which is characterized in that two-dimensional graphene is used as a substrate, the surface of the two-dimensional graphene is modified with an oxygen-containing functional group, and a functional polymer branch chain containing nitrogen, sulfur or phosphorus heteroatoms is covalently grafted to form a local three-dimensional network winding structure; the carrier is loaded with platinum, palladium, ruthenium and other metal or alloy nanoparticles, the particle size is 2-8 nm, the loading capacity is 10%-40%, and the particles are anchored to polymer functional sites or reduced in situ to a graphene defect area through coordination. A polymer branch chain has pH responsiveness and can adjust the local proton transmission efficiency; the grafting density is 3-15 grafting points per 100 carbon atoms, so that high dispersion and stable anchoring of metal particles are effectively realized; the specific surface area of the carrier is 400-800m < 2 > / g, the electrochemical active area is not less than 80m < 2 > / g, and the activity retention rate is greater than 80% after 5000 circles of accelerated durability tests. The activity, the stability and the proton conduction performance of the catalyst are remarkably improved, and the catalyst is suitable for high-performance fuel cells.

The invention provides a method for recovering platinum group metal from a waste automobile exhaust purification catalyst, and belongs to the field of precious metal recovery. The method comprises the following steps: carrying out crushing and impurity removal pretreatment on the waste catalyst to obtain solid residues; mixing the obtained solid slag with alkali liquor, and performing hot-pressing activation to obtain active slag; leaching the active slag by using an acid leaching system of hydrochloric acid-hydrogen peroxide-sodium chloride to obtain a leaching solution enriched with platinum group metals; adjusting the acidity of the leachate, adding a first adsorption material, selectively adsorbing platinum and palladium, and separating supernate and a platinum / palladium enrichment material; adjusting the acidity of the supernate, adding a second adsorption material, selectively adsorbing rhodium, carrying out solid-liquid separation, and collecting a rhodium enrichment material; respectively eluting and refining the platinum / palladium enrichment material and the rhodium enrichment material, and recovering platinum, palladium and rhodium; through the optimally designed recovery method of alkaline hot-pressing activation-mild acidic directional leaching-two-stage magnetic adsorption separation, efficient recovery of platinum, palladium and rhodium in the waste automobile exhaust catalyst is realized.

To provide a technology to improve a hydrogen occlusion time (response speed) while suppressing a cost in a hydrogen detection element.SOLUTION: A hydrogen detection element of the present invention is an electromagnetic meta-material obtained by periodically arranging meta structures composed of a hydrogen occlusion metal film and having a predetermined shape and size on a substrate at a predetermined pitch having 1,000 nm or less and controls a reflection, transmission or absorption spectrum of incident electromagnetic wave. The hydrogen occlusion metal film contains no precious metal and palladium can be used as hydrogen occlusion metal. Further, a spectrum of an incident wave can remove near-infrared light from visible light. Further, the present invention provides a hydrogen detection device including: the hydrogen detection element; a light source unit that can emit incident electromagnetic wave; a light-receiving unit that receives light reflected by or transmitted through the hydrogen detection element; and a detection unit that detects hydrogen on the basis of a light-receiving result of the light-receiving unit.SELECTED DRAWING: Figure 5

The invention belongs to the crossing field of nano materials and coordination chemistry, and particularly relates to a chiral silver-palladium nano-cluster, a preparation method thereof and application of the chiral silver-palladium nano-cluster in aggregation-induced emission and circular polarization emission. The chemical formula of the chiral silver-palladium nano-cluster is C174H180Ag14Cl4P12Pd, the chiral silver-palladium nano-cluster belongs to a monoclinic system, and the chiral silver-palladium nano-cluster has an atomic-scale accurate structure, is small in size (1.82 nm) and good in monodispersity. The chiral nano-cluster shows good chiral optical activity, has an emission peak at 662 nm, has significant chiral optical activity characteristics and circular dichroism signals, also has two characteristics of aggregation-induced emission and circular polarization emission, has an absorption asymmetric factor and an emission asymmetric factor as high as 8.2 * 10 <-4 > and 2.2 * 10 <-3 > respectively, and has important application value.

The invention discloses a catalyst for dealkylation in a chlorine-containing environment as well as a preparation method and application of the catalyst, and belongs to the technical field of catalyst reaction. The catalyst comprises a carrier and an active component, wherein the carrier comprises ZrO2 and MgFeO4; the active component comprises an auxiliary agent and a noble metal component, the auxiliary agent comprises a V2O5-WO3 composite oxide and a CeO2-MnO2 composite oxide, and the noble metal component comprises at least three of rhodium, ruthenium, platinum, palladium and gold. The noble metal components grow in mesopores of the carrier in a confined manner, and the auxiliaries with dechlorination and catalytic oxidation functions are uniformly distributed on the surface of the carrier, so that a two-step catalytic strategy of dechlorination and oxidation of chlorine-containing waste gas is realized, the poisoning phenomenon of the catalyst is effectively avoided, and an excellent catalytic effect is formed. Moreover, the catalyst is stable in property, still keeps an excellent catalytic function after being used for a long time, and is higher in practicability and better in economical efficiency.

A nickel-based alloy composition consisting, in weight percent, of: 1.5 to 4.5% aluminium, 1.1 to 3.4% titanium, 0.0 to 4.0% niobium, 0.0 to 5.2% tantalum, 0.9 to 6.6% tungsten, 0.0 to 3.0% molybdenum, 0.0 to 24.0% cobalt, 12.5 to 20.6% chromium, 0.02 to 0.15% carbon, 0.001 to 0.015% boron, 0.0 to 0.1% zirconium, 0.0 to 3.0% rhenium, 0.0 to 2.0% ruthenium, 0.0 to 3.0% iridium, 0.0 to 0.5% vanadium, 0.0 to 1.0% palladium, 0.0 to 1.0% platinum, 0.0 to 0.5% silicon, 0.0 to 0.1% yttrium, 0.0 to 0.1% lanthanum, 0.0 to 0.1% cerium, 0.0 to 0.003% sulphur, 0.0 to 0.25% manganese, 0.0 to 0.1 magnesium, 0.0 to 5.0% iron, 0.0 to 0.5% copper, 0.0 to 1.0% hafnium, the balance being nickel and incidental impurities, wherein the following equations are satisfied in which WAl, WTi, WNb, WTa and WW are the weight percent of aluminium, titanium, niobium, tantalum and tungsten in the alloy respectively 0.65≤0.3 WNb+0.15 W 3.6≤WAl+0.5 WTi+0.3 WNb+0.15 WTa≤5.7 WTa+0.92WW≤6.1.

According to the microwave reactor and method for recycling the three-way catalytic precious metal, through the synergistic effect of microwave radiation and the telescopic glass stirring rod, the problem that the mass transfer efficiency is low due to high viscosity of a traditional ionic liquid leaching system is solved, the precious metal leaching time is shortened, and the efficiency is improved. Meanwhile, a diamond ATR crystal infrared probe is adopted to monitor components of a reaction solution in real time, multi-parameter linkage control of microwave power, temperature and stirring rate is combined, reaction conditions are dynamically optimized, and the recovery rate of platinum, palladium and rhodium is increased. The method systematically solves the technical bottlenecks of high energy consumption, heavy pollution and low ionic liquid leaching efficiency of the traditional pyrogenic process / wet process, and provides an innovative scheme with high efficiency, low environmental load and industrial feasibility for precious metal recovery.

The invention relates to an efficient separation and comprehensive recovery method based on copper-nickel complex platinum-palladium concentrate. The efficient separation and comprehensive recovery method comprises the following steps: (1) smelting and enriching; (2) carrying out two-stage cascade blowing enrichment; (3) stage selective crystallization; (4) separating mixed ore; (5) selective separation of alloyed gold; (6) separating copper-nickel bulk concentrate; and (7) mixing the nickel sulfate crystal obtained in the step (5) and the nickel oxide obtained in the step (6), feeding the mixture into a reverberatory furnace, smelting to obtain a nickel anode plate with crude nickel as a main component, and then feeding the nickel anode plate into an electrolysis process for electrolysis to obtain cathode nickel, anode mud and silver-cobalt slag products. According to the method, valuable metals such as platinum, palladium, gold, silver, copper, nickel and cobalt in the complex platinum-palladium concentrate can be efficiently separated and recovered, the separation effect is good, the comprehensive recovery rate is high, comprehensive recycling of resources is fully achieved, the problems that an existing recovery process is poor in recovery effect and high in cost are solved, and good economic benefits and social benefits are achieved.

The invention provides a light response type mononuclear nickel / palladium complex for preparing ultra-high molecular weight polyethylene and a preparation method and application of the light response type mononuclear nickel / palladium complex, the structural formula of the light response type mononuclear nickel / palladium complex is as follows: # imgabs0 #. The light response type nickel / palladium complex provided by the invention has a rigid diphenylethylene skeleton and is converted from trans-configuration (E) to cis-configuration (Z) under irradiation of 365nm ultraviolet light; under the irradiation of 405nm ultraviolet light, a cis-configuration (Z) is converted into a trans-configuration (E). Therefore, the ratio of the E-type configuration to the Z-type configuration in the photoresponse type nickel complex can be accurately regulated and controlled by utilizing ultraviolet irradiation, and the photoresponse type nickel complex is used as a catalyst to regulate the reaction rate of two different sites in the olefin polymerization process, so that the molecular weight of a polyolefin material and the insertion rate of a polar monomer are regulated and controlled. The molecular weight distribution of the obtained ultrahigh molecular weight polyethylene is 1.60-2.57, and the molecular weight is 632-1184 * 10 < 4 > g.mol <-1 >. The catalyst has ultrahigh catalytic activity, can be used for producing high-performance polyethylene, can greatly reduce the production cost of the catalyst, and has great industrial application potential.

The invention discloses a palladium-doped Ir-Sn oxide titanium anode with high catalytic activity and a preparation method of the palladium-doped Ir-Sn oxide titanium anode, and belongs to the technical field of electrolytic anodes. The anode comprises a titanium substrate, a TiO2-Ta2O5 intermediate layer and an Ir-Sn-Pd oxide catalyst layer, the molar ratio of Ir to Sn to Pd in the catalyst layer is (5-6): 3: (1-2), and the total metal ion concentration is 0.3 mol L. The preparation method is realized through titanium substrate pretreatment (sand blasting and etching), intermediate layer coating sintering (a TiCl4-TaCl5 solution) and catalyst layer circulating coating sintering (an H2IrCl6-SnCl4-PdCl2 mixed solution). The relatively cheap palladium element is introduced, the electron structure of the catalyst layer is optimized by utilizing the defect effect, the charge transfer resistance is reduced to 6.7 omegacm, and meanwhile, the iridium consumption is reduced by more than 30%. Experiments show that the cell voltage of the anode is stabilized at 0.95 V (the current density is 5Acm <-2 >), the accelerated life reaches 1630 hours, the coating binding force is 62N, and the corrosion rate in an acidic electrolyte is only 0.01 mm / year. Compared with a traditional iridium tantalum anode, the cost is reduced by 40%, and the overpotential in the oxygen evolution reaction is as low as 0.45 V.

The invention relates to the technical field of CO oxidation, in particular to a CO oxidation catalyst, a preparation method of the CO oxidation catalyst and a CO oxidation method. The carrier is selected from one or more of dysprosium oxide, yttrium oxide and holmium oxide, the particle size of the carrier is 20-100 nm, and the average particle size is 25-76 nm; the noble metal is selected from one or more of platinum, ruthenium and palladium, and the content of the noble metal element is 0.1 wt%-2wt% of the carrier. One or more of dysprosium oxide, yttrium oxide and holmium oxide with the particle size of 20-100 nm and the average particle size of 25-76 nm are adopted as the carrier to prepare the CO oxidation catalyst, and the CO oxidation catalyst is used for CO catalytic oxidation, has the advantage of lower carbon monoxide ignition temperature and is long in service life.

The embodiment of the invention discloses a bifunctional catalyst for direct synthesis and catalytic oxidation of hydrogen peroxide and a preparation method of the bifunctional catalyst. The catalyst with the dual functions is provided with Pd-based alloy nanoparticles and high-dispersion monatomic transition metal sites at the same time. The preparation method comprises the following steps: preparing a zeolite-like molecular sieve carrier taking transition metal as link ions through a rolling hydrothermal method; then loading gold and palladium metals on the zeolite-like molecular sieve carrier by adopting a low-temperature liquid phase reduction method to obtain a bifunctional catalyst; the bifunctional catalyst for direct synthesis of hydrogen peroxide and preparation of methanol through methane oxidation has high methane conversion rate, methanol selectivity and yield.

High entropy alloy catalysts may be used for production of hydrogen. An example method of hydrogen production may include: introducing a hydrocarbon to a reactor, wherein the reactor contains therein a catalyst, wherein the reactor is substantially absent of oxygen and water, wherein the catalyst comprises a high entropy alloy and a catalyst support, wherein the catalyst is present in a form of a first plurality of particles, wherein the first plurality of particles is submicron-sized, wherein the high entropy alloy has an entropy, S, such that S≥12.47 J K−1 mol−1, and wherein the high entropy alloy comprises at least five of: iron, cobalt, manganese, nickel, molybdenum, copper, zinc, titanium, chromium, vanadium, aluminum, gallium, ruthenium, rhodium, palladium, silver, indium, tungsten, rhenium, iridium, platinum, gold, and bismuth; and reacting the hydrocarbon over the catalyst to produce solid carbon and hydrogen gas.

The invention belongs to the technical field of photocatalysts, and particularly relates to a palladium-loaded bismuth-based heterojunction photocatalyst as well as a preparation method and application thereof. The palladium-loaded bismuth-based heterojunction photocatalyst provided by the invention comprises Pd nano-particle active sites and a heterojunction structure formed by CuBi2O4 and a BiOBr nanosheet, wherein the Pd nano-particle active sites and the CuBi2O4 and BiOBr nano-sheets are arranged in the heterojunction structure; the active sites of the Pd nanoparticles are loaded on the BiOBr nanosheets to form Pd-BiOBr; the Pd-BiOBr is loaded on the surface of the CuBi2O4; and the CuBi2O4 is in a rod-shaped array. The catalyst is applied to photocatalysis of CO2RR, and the selectivity and the yield of a C2 product can be improved.

The invention provides a preparation method of a methanol-resistant PdCu alloy cathode material, which comprises the following steps: carrying out replacement on a copper foil and a palladium replacement solution to obtain a Pd-Cu alloy precursor, controlling the atomic ratio of Pd / Cu in the Pd-Cu alloy precursor to be less than 1 / 3, then annealing at 300-500 DEG C for more than 24 hours to obtain a PdCu alloy film precursor, and finally preparing the methanol-resistant PdCu alloy cathode material. The PdCu alloy film precursor is subjected to dealloying through an acid system, the Pd / Cu atomic ratio in the methanol-resistant PdCu alloy cathode material is controlled to be larger than 5, and the methanol-resistant PdCu alloy cathode material of a bicontinuous porous structure is obtained. According to the methanol-resistant PdCu alloy cathode material and the preparation method thereof, the problems that a traditional Pt group metal catalyst is weak in methanol poison resistance and insufficient in ORR activity are solved, and the methanol-resistant PdCu alloy cathode material with high methanol resistance and high ORR catalytic capacity is obtained.

The present invention discloses a gas-phase preparation method of 1,1,1,4,4,4-hexafluoro-2-butyne. Using a mixture of 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-butene and hydrogen as raw materials, under the action of a particulate catalyst, 1,1,1,4,4,4-hexafluoro-2-butyne is obtained through a one-step hydrodechlorination reaction. The catalyst includes a carbon carrier and an active phase in the form of hollow spheres supported on the carbon carrier. The active phase includes: a first metal selected from at least one of silver, copper, nickel, and cobalt; and a second metal selected from at least one of palladium, platinum, and rhodium. The present invention has the advantages of high product selectivity, high catalytic activity, obtaining the reaction product through a one-step reaction, and being suitable for industrial application, etc.

A method may include contacting a hydrocarbon-containing feed with a catalyst in a reactor to form an olefin-containing effluent, then at least partially separating the olefin-containing effluent from the catalyst. Passing the catalyst to a combustor and heating the catalyst by combusting a supplemental fuel. The supplemental fuel includes methane in an amount greater than or equal to 1 mol. %. Passing the catalyst from the combustor to the reactor, such that at least a portion of the catalyst continuously cycles between the reactor and the combustor. The catalyst includes from 0.1 wt. % to 10 wt. % of one or more metals chosen from gallium, indium, thallium or combinations thereof, from 5 ppmw to 1000 ppmw of one or more metals chosen from platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof, from 100 ppmw to 30000 ppmw of chromium, and at least 85 wt. % support.

The invention provides a medium / high-entropy metal organic framework material and a preparation method thereof, the configuration entropy delta S of the medium-entropy metal organic framework material is greater than 1R and less than 1.5 R, and the configuration entropy delta Sgt of the high-entropy metal organic framework material is greater than 1R and less than 1.5 R; 1.5 R, R is a gas constant and is 8.314; metal ions in the medium / high-entropy metal organic framework material are at least four of magnesium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, ruthenium, palladium, silver, cadmium, indium, tin, iridium, rhodium and platinum, the molar weight of each metal ion is 10%-70% of the total molar weight of the metal ions, and the ratio of the total molar weight of the metal ions to the molar weight of the organic ligand is 1: (2-8). The preparation method has the characteristics of being programmable and adjustable, the number of metal types is four or more, and the metal proportion change of the metal content before and after preparation is smaller than 5%. The medium / high-entropy MOFs provided by the invention has the characteristics of uniform metal element distribution, accurate modulation and organic ligand replacement, and can accurately regulate and control the types and proportions of metals in the medium / high-entropy MOFs as well as the structure and performance of the obtained sample.