Rhodium catalyst for hydrogen production by ethanol reforming and preparation method thereof

Abstract

The invention provides a rhodium catalyst for hydrogen production by ethanol reforming and a preparation method thereof, the preparation method comprises the following steps: mixing a rhodium source, a lanthanum source, a carrier and a solvent, removing the solvent and drying to obtain a mixture; the carrier comprises aluminum oxide and / or aluminum salt; and carrying out reduction roasting on the mixture to obtain the bioethanol reforming hydrogen production catalyst. According to the preparation method disclosed by the invention, a stable rhodium-lanthanum diatom structure loaded on the surface of the carrier can be obtained through impregnation and high-temperature reduction, so that the obtained rhodium catalyst can efficiently produce hydrogen in an ethanol steam reforming reaction, and keeps high stability in a harsh industrial condition.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production from renewable energy, and relates to a rhodium catalyst for ethanol reforming hydrogen production and a preparation method thereof. Background Art

[0002] Hydrogen energy is a green and renewable energy source that can replace traditional energy sources. The ethanol reforming hydrogen production method is a green hydrogen production method. The specific process is that ethanol and water decompose under the action of a catalyst to produce hydrogen and other by-products. The higher the hydrogen production rate, the better the catalyst activity. Although bioethanol reforming hydrogen production technology can effectively produce hydrogen, it requires highly active and highly selective catalysts to improve the efficiency of bioethanol reforming hydrogen production. Rhodium is generally considered to be the most effective active component for bioethanol reforming hydrogen production due to its good CC bond breaking ability.

[0003] For example, CN 118204078A discloses a method for preparing a spherical Rh-based catalyst for hydrogen production by reforming bioethanol. The method comprises the following steps: firstly, adding deionized water, cerium nitrate, lanthanum nitrate and rhodium nitrate into a non-stick pan to prepare a precursor solution; then, 2 O 3 The microspheres are calcined and pretreated before being added to a precursor solution, and then heated and stirred to obtain a catalyst precursor. The catalyst precursor is transferred to an oven for drying, and then transferred to a calcining furnace for calcination to obtain a spherical rhodium-based catalyst, wherein the Rh content is 0.1% to 0.6%. This method first prepares a precursor solution, then calcines the carrier, and then synthesizes the catalyst. The synthesis steps are complicated and not conducive to industrialization.

[0004] For example, CN 115382542A discloses a method for preparing a dual catalyst for hydrogen production by reforming bioethanol. The dual catalyst includes an Rh-based catalyst and a Pt-based catalyst, which are mixed and filled in a set ratio. The Rh-based catalyst is composed of an Al-based catalyst loaded with a composite solid solution of Ce, La, and Rh. 2 O 3 The Pt-based catalyst is composed of Al2O3 loaded with Ce, La, and Pt composite solid solution. 2 O 3 Microsphere composition. The average particle size of the Pt-based catalyst is 1.2 to 1.5 times that of the rhodium-based catalyst, and the ratio of the filling height of the Rh-based catalyst to the filling height of the Pt-based catalyst is 1:2 to 1:4. The content of Rh in the Rh-based catalyst is 0.02% to 0.05%. This method requires the preparation of two precious metal catalysts separately, and the preparation cost is relatively high; and the regulation of the filling ratio will further affect the performance of the catalyst.

[0005] For another example, CN 102513105A discloses a loaded precious metal catalyst for hydrogen production by reforming bioethanol, wherein the catalyst comprises two parts of precious metal and a carrier. The precious metal is one or a combination of two or more of rhodium, platinum, palladium, iridium, ruthenium, and gold; the carrier is a cerium-based composite oxide carrier represented by a cerium-lanthanum solid solution. The preparation method of the cerium-based composite oxide includes a sol-gel method, a hydrothermal synthesis method, etc., and finally the precious metal is loaded onto the carrier by an impregnation method. This method first synthesizes the carrier and then loads the precious metal, which has a complex process and high synthesis cost, and is not conducive to the industrial production of the catalyst.

[0006] Based on the above research, it is necessary to provide a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen. The preparation method is not only simple, low-cost and easy to operate, but also the obtained rhodium catalyst can improve the hydrogen production activity and stability of the ethanol reforming hydrogen production reaction. Summary of the invention

[0007] The object of the present invention is to provide a rhodium catalyst for ethanol reforming to produce hydrogen and a preparation method thereof. The preparation method can obtain a rhodium-lanthanum diatomic stable structure supported on the surface of a carrier through impregnation and high-temperature reduction, so that the obtained rhodium catalyst can efficiently produce hydrogen in the ethanol steam reforming reaction and maintain high stability under harsh industrial conditions.

[0008] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, the preparation method comprising the following steps:

[0010] (1) mixing a rhodium source, a lanthanum source, a carrier and a solvent, removing the solvent and drying to obtain a mixed material;

[0011] The carrier comprises alumina and / or aluminum salt;

[0012] (2) The mixed material of step (1) is subjected to reduction roasting to obtain the bioethanol reforming hydrogen production catalyst.

[0013] When the carrier in step (1) of the present invention is alumina, the Rh and La metal elements are impregnated into the Al by impregnation. 2 O 3 On the carrier, after room temperature stirring, drying process and high temperature reduction calcination treatment, Rh / La-Al 2 O 3Catalyst. In addition, the present invention performs calcination in a reducing atmosphere, which can effectively avoid the formation of metal oxides and promote the reduction of metal active components, thereby improving the metal dispersibility and activity of the catalyst. Compared with conventional calcination in nitrogen or air, it can reduce the aggregation of metal particles, improve the stability and durability of the catalyst, and thus improve its catalytic performance.

[0014] When the carrier in step (1) of the present invention is an aluminum salt, the aluminum salt is a solvent-soluble salt that can be fully dispersed with the Rh source and the La source, thereby improving the uniformity of the distribution of the active components on the carrier in the final rhodium catalyst, and the aluminum salt can obtain Al in situ during the later reduction calcination. 2 O 3 In addition, aluminum salts may form specific derivatives during the pyrolysis process, which will interact specifically with Rh and La precursors at high temperatures, thereby regulating the dispersibility of the final catalyst and the size of the active metal particles. Aluminum salts can help form an alumina carrier with better porosity during the pyrolysis process, thereby increasing the surface area and porosity of the catalyst and enhancing its catalytic activity.

[0015] In the rhodium catalyst obtained by the present invention, lanthanum oxide is a structural additive. Lanthanum oxide enables rhodium nanoparticles to be transformed into a rhodium-lanthanum diatomic structure during the reduction process, forming a stable rhodium-lanthanum diatomic structure, so that the rhodium catalyst can efficiently produce hydrogen in the ethanol steam reforming reaction and maintain high stability under harsh industrial conditions, solving the problem of traditional Rh / Al 2 O 3 The catalyst has poor low-temperature activity and poor stability.

[0016] Preferably, when the carrier in step (1) is an aluminum salt, the mixed material in step (1) is also calcined before the reduction roasting.

[0017] In order to fully convert the aluminum salt into high-quality alumina, and to remove impurities in the aluminum salt and increase the loading strength of the carrier and the active component, the present invention also performs high-temperature calcination before reduction roasting, thereby further improving the performance of the catalyst.

[0018] Preferably, the calcination is carried out in a protective gas.

[0019] Preferably, the protective gas includes any one of nitrogen, argon or neon, or a combination of at least two of them.

[0020] Preferably, the calcination temperature is 600-800°C, such as 600°C, 700°C or 800°C, and the calcination time is 1-3h, such as 1h, 2h or 3h, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0021] Preferably, the reduction roasting in step (2) is carried out in a mixed gas, which includes 5-20 vol% of reducing gas, for example, 5 vol%, 10 vol%, 15 vol% or 20 vol%, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0022] The reduction calcination in step (2) of the present invention is carried out in a reducing gas, but the content of the reducing gas should not be too high or too low. If the content of the reducing gas is too low, it will not have a sufficient reducing effect. If the content of the reducing gas is too high, it will lead to excessive reduction of the metal, degradation of the carrier, aggregation of metal particles and generation of by-products, thereby reducing the catalyst performance.

[0023] Preferably, the reducing gas comprises hydrogen.

[0024] Preferably, the flow rate of the mixed gas is 40-60 mL / min, for example, 40 mL / min, 50 mL / min or 60 mL / min, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0025] Preferably, the reduction roasting temperature in step (2) is 300-500°C, for example, 300°C, 400°C or 500°C, and the time is 2-5h, for example, 2h, 3h, 4h or 5h, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0026] The reduction roasting described in the present invention is carried out at a specific temperature. If the temperature of the reduction roasting is too low, it may lead to incomplete reduction, and the oxides may be difficult to be completely converted into a metallic state, affecting the purity and performance of the product. If the temperature of the reduction roasting is too high, it will affect the activity and stability of the catalyst, and may cause metal melting and sintering, affecting the product morphology and particle size distribution, and may even exceed the temperature resistance range of the equipment, causing equipment damage.

[0027] Preferably, the heating rate of the reduction roasting in step (2) is 8-12°C / min, for example, 8°C / min, 9°C / min, 10°C / min, 11°C / min or 12°C / min, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0028] Preferably, after the reduction roasting in step (2), tableting, grinding and screening are also performed.

[0029] Preferably, the sieving obtains a rhodium catalyst of 40-60 mesh, for example, 40 mesh, 50 mesh or 60 mesh, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0030] Preferably, the aluminum salt in step (1) comprises aluminum chloride and / or aluminum nitrate.

[0031] Preferably, the mass ratio of the carrier to the solvent in step (1) is 1:(40-60), for example, 1:40, 1:50 or 1:60, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0032] Preferably, the solvent in step (1) comprises water.

[0033] Preferably, the method of removing the solvent in step (1) comprises rotary evaporation.

[0034] Preferably, the rotary evaporation temperature is 70-90°C, such as 70°C, 80°C or 90°C, and the time is 1-3h, such as 1h, 2h or 3h, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0035] In a second aspect, the present invention provides a rhodium catalyst for ethanol reforming to produce hydrogen, wherein the rhodium catalyst for ethanol reforming to produce hydrogen is prepared by the preparation method described in the first aspect.

[0036] Preferably, the rhodium catalyst for ethanol reforming to produce hydrogen comprises an active component and a catalyst carrier, the active component comprises Rh and La, and the catalyst carrier comprises alumina.

[0037] Preferably, the content of Rh in the rhodium catalyst for ethanol reforming to produce hydrogen is ≤1.5wt%, for example, it can be 1.5wt%, 1.3wt%, 1.1wt%, 0.9wt%, 0.7wt% or 0.5wt%, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable, preferably ≤1.0wt%.

[0038] The rhodium catalyst of the present invention can still have excellent catalytic performance even when the rhodium content is low.

[0039] Preferably, the La content in the rhodium catalyst for ethanol reforming to produce hydrogen is 0.5-20wt%, for example, it can be 0.5wt%, 1wt%, 5wt%, 10wt%, 15wt% or 20wt%, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The active components in the rhodium catalyst obtained by the preparation method of the present invention are uniformly dispersed on the carrier, and the active components are Rh-La diatomic sites. La can promote the dispersion of Rh to form Rh-La diatomic active centers. By introducing La and adopting a specific preparation method, the performance of the catalyst can be significantly improved, the hydrogen production is effectively increased, and the durability and anti-deactivation ability of the catalyst in long-term reactions are enhanced. In addition, the preparation method of the present invention is simple, low-cost, simple to operate, and can be applied on a large scale in industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The rhodium catalyst Rh / La described in Example 1 of the present invention 10 -Al 2 O 3 And the rhodium catalyst Rh / Al described in Comparative Example 1 2 O 3 Graph of hydrogen production at different temperatures;

[0043] Figure 2 The rhodium catalyst Rh / La described in Example 1 of the present invention 10 -Al 2 O 3 And the rhodium catalyst Rh / Al described in Comparative Example 1 2 O 3 Stability test diagram at 550°C. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0045] Example 1

[0046] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, the preparation method comprising the following steps:

[0047] (1) Rh(NO 3 ) 3 Dissolve in 200 mL of deionized water, stir thoroughly and add La(NO 3 ) 3 6H 2 O was prepared into a precursor salt solution, and 4 g Al 2 O 3 The carrier was placed in the above precursor solution and stirred for 2 hours. The sample was placed on a rotary evaporator to remove the solvent. The sample was then placed in a 60°C oven for 12 hours for drying.

[0048] (2) The dried material obtained in step (1) was heated in a H2O2 atmosphere at a flow rate of 50 mL / min. 2 and N 2 Mixed gas (H 2 and N 2 In the mixed gas, H 2 The content of 10 vol%) was heated to 400°C at a heating rate of 10°C / min, and then reduced and calcined for 3 hours. The sample was pressed, ground and sieved, and catalyst particles of 40-60 mesh were selected to obtain the rhodium catalyst Rh / La for ethanol reforming hydrogen production. 10 -Al 2 O 3 , wherein the Rh content in the rhodium catalyst is 1wt% and the La content is 10wt%.

[0049] Example 2

[0050] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, the preparation method comprising the following steps:

[0051] (1) Rh(NO 3 ) 3 Dissolve in 100 mL of deionized water, stir thoroughly and add La(NO 3 ) 3 6H 2 O was prepared into a precursor salt solution, and 5.23 g of AlCl 3 Dissolve in 100 mL of water to obtain an aluminum chloride solution, place the aluminum chloride solution in the above precursor solution, stir thoroughly for 2 hours, place the sample on a rotary evaporator to remove the solvent, and then place the sample in a 60°C oven for 12 hours to dry;

[0052] (2) The dried material obtained in step (1) was calcined at 700° C. for 2 h under a nitrogen atmosphere, and then heated to 400 ° C. at a flow rate of 50 mL / min. 2 and N 2 Mixed gas (H 2 and N 2 In the mixed gas, H 2 The content of Rh in ethanol reforming and hydrogen production is 10 vol%), the temperature is increased to 400°C at a heating rate of 10°C / min, and then the sample is reduced for 3 hours, the sample is tableted, ground and sieved, and catalyst particles of 40-60 mesh are selected to obtain the rhodium catalyst for ethanol reforming and hydrogen production, wherein the content of Rh in the rhodium catalyst is 1 wt%, and the content of La is 10 wt%.

[0053] Example 3

[0054] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, the preparation method comprising the following steps:

[0055] (1) Rh(NO 3 ) 3 Dissolve in 150 mL of deionized water, stir thoroughly and add La(NO 3 ) 3 6H 2 O was prepared into a precursor salt solution, and 5.23 g of AlCl 3 Dissolve in 150 mL of water to obtain an aluminum chloride solution, place the aluminum chloride solution in the above precursor solution, stir thoroughly for 2 hours, place the sample on a rotary evaporator to remove the solvent, and then place the sample in a 60°C oven for 12 hours to dry;

[0056] (2) The dried material obtained in step (1) was calcined at 600°C for 3 h under a nitrogen atmosphere, and then heated to 40 mL / min of H 2 and N 2 Mixed gas (H 2 and N 2 In the mixed gas, H 2 The content of the rhodium catalyst for ethanol reforming hydrogen production is 5 vol%), and the temperature is increased to 500°C at a heating rate of 8°C / min and then reduced for 2 hours. Finally, the sample is tableted, ground and sieved, and catalyst particles of 40-60 mesh are selected to obtain the rhodium catalyst for ethanol reforming hydrogen production, wherein the Rh content in the rhodium catalyst is 0.5 wt% and the La content is 15 wt%.

[0057] Example 4

[0058] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, the preparation method comprising the following steps:

[0059] (1) Rh(NO 3 ) 3 Dissolve in 150 mL of deionized water, stir thoroughly and add La(NO 3 ) 3 6H 2 O was prepared into a precursor salt solution, and 5.23 g of AlCl 3 Dissolve in 150 mL of water to obtain an aluminum chloride solution, place the aluminum chloride solution in the above precursor solution, stir thoroughly for 2 hours, place the sample on a rotary evaporator to remove the solvent, and then place the sample in a 60°C oven for 12 hours to dry;

[0060] (2) The dried material obtained in step (1) was calcined at 800°C for 1 h under a nitrogen atmosphere, and then heated to 400 °C at a flow rate of 60 mL / min. 2 and N 2 Mixed gas (H 2 and N 2 In the mixed gas, H2 The content of La is 20 vol%), and the temperature is increased to 300°C at a heating rate of 12°C / min. After reduction for 5 hours, the sample is tableted, ground and sieved, and catalyst particles of 40-60 mesh are selected to obtain the rhodium catalyst for ethanol reforming to produce hydrogen, wherein the Rh content in the rhodium catalyst is 1wt%, and the La content is 20wt%.

[0061] Example 5

[0062] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen. The preparation method includes the following steps: 2 and N 2 In the mixed gas, H 2 Except that the content of is 2 vol%, the rest is the same as Example 2.

[0063] Example 6

[0064] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen. The preparation method includes the following steps: 2 and N 2 In the mixed gas, H 2 Except that the content of is 25 vol%, the rest is the same as Example 2.

[0065] Example 7

[0066] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen. The preparation method is the same as that of Embodiment 2 except that the reduction in step (2) is carried out at 200°C.

[0067] Example 8

[0068] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen. The preparation method is the same as that of Embodiment 2 except that the reduction in step (2) is carried out at 600°C.

[0069] Example 9

[0070] This embodiment provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen. The preparation method is the same as that of Example 2 except that the catalyst is not calcined at 700° C. for 2 h under a nitrogen atmosphere.

[0071] Comparative Example 1

[0072] This comparative example provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, except that La(NO 3 ) 3 6H 2 Except for O, the rest are the same as in Example 1.

[0073] Comparative Example 2

[0074] This comparative example provides a method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, except that the dried material obtained in step (1) is heated in N at a flow rate of 50 mL / min. 2 The same procedures as in Example 1 were followed except that the temperature was raised to 400° C. at a heating rate of 10° C. / min and calcined for 3 hours.

[0075] 100 mg of the rhodium catalyst obtained in the above examples and comparative examples was taken and catalyzed under the following conditions: at normal pressure, the molar ratio of water to ethanol was 4, and the mass space velocity of ethanol was 18.0 h -1 , the rhodium catalyst Rh / La described in Example 1 of the present invention 10 -Al 2 O 3 And the rhodium catalyst Rh / Al described in Comparative Example 1 2 O 3 The hydrogen production at different temperatures is shown in the figure Figure 1 As shown in the stability test diagram at 550°C Figure 2 The hydrogen production at 550°C and the hydrogen production after maintaining at 550°C for 70 hours are shown in Table 1 below:

[0076] Table 1

[0077]

[0078]

[0079] From Table 1 we can see that:

[0080] (1) By combining Example 1 and Comparative Example 1, Figure 1 and Figure 2 It can be seen that the addition of La in this application can significantly improve the hydrogen production and the stability of the catalyst. Figure 1 It can be seen that the hydrogen production at 400℃, 450℃, 500℃, 550℃, 600℃ and 650℃ increased by 6.5%, 9.2%, 14.6%, 11.1%, 7.5% and 5.3% respectively. Figure 2 It can be seen that the catalyst stability is significantly improved at 550°C, and no obvious deactivation occurs within 70 hours; from Example 1 and Comparative Example 2, it can be seen that the reduction calcination under hydrogen in the present invention can more effectively reduce metal oxides and enhance the activity and selectivity of the catalyst compared to calcination under nitrogen.

[0081] (2) It can be seen from Example 1 and Examples 5-8 that the hydrogen concentration and temperature of the reduction roasting in step (1) of the present invention will affect the roasting effect, thereby affecting the performance of the catalyst; It can be seen from Example 1 and Example 9 that when the present invention is selected to prepare the carrier in situ using aluminum salt, it is preferred to perform a high-temperature calcination step before the reduction roasting to promote the growth of alumina and the loading of active components, thereby further improving the catalytic performance of the catalyst.

[0082] In summary, the present invention provides a rhodium catalyst for ethanol reforming to produce hydrogen and a preparation method thereof. The preparation method can obtain a stable rhodium-lanthanum diatomic structure supported on the surface of a carrier through impregnation and high-temperature reduction, so that the obtained rhodium catalyst can efficiently produce hydrogen in the ethanol steam reforming reaction and maintain high stability under harsh industrial conditions.

[0083] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention are within the protection scope and disclosure scope of the present invention.

Claims

1. A method for preparing a rhodium catalyst for ethanol reforming to produce hydrogen, characterized in that: The preparation method comprises the following steps: (1) mixing a rhodium source, a lanthanum source, a carrier and a solvent, removing the solvent and drying to obtain a mixed material; The carrier comprises alumina and / or aluminum salt; (2) The mixed material of step (1) is subjected to reduction roasting to obtain the bioethanol reforming hydrogen production catalyst.

2. The preparation method according to claim 1, characterized in that: When the carrier in step (1) is an aluminum salt, the mixed material in step (1) is also calcined before the reduction roasting; Preferably, the calcination is carried out in a protective gas; Preferably, the calcination temperature is 600-800° C. and the calcination time is 1-3 h.

3. The preparation method according to claim 1 or 2, characterized in that: The reduction roasting in step (2) is carried out in a mixed gas, wherein the mixed gas comprises 5-20 vol% of a reducing gas; Preferably, the reducing gas comprises hydrogen; Preferably, the flow rate of the mixed gas is 40-60 mL / min.

4. The preparation method according to any one of claims 1 to 3, characterized in that The reduction roasting temperature in step (2) is 300-500° C. and the time is 2-5 hours; Preferably, the heating rate of the reduction roasting in step (2) is 8-12°C / min.

5. The preparation method according to any one of claims 1 to 4, characterized in that: After the reduction roasting in step (2), tableting, grinding and sieving are further performed; Preferably, the sieving obtains a rhodium catalyst with a mesh size of 40-60.

6. The preparation method according to any one of claims 1 to 5, characterized in that: The aluminum salt in step (1) includes aluminum chloride and / or aluminum nitrate; Preferably, the mass ratio of the carrier to the solvent in step (1) is 1:(40-60); Preferably, the solvent in step (1) comprises water.

7. The preparation method according to any one of claims 1 to 6, characterized in that: The method of removing the solvent in step (1) comprises rotary evaporation; Preferably, the rotary evaporation temperature is 70-90° C. and the time is 1-3 h.

8. A rhodium catalyst for ethanol reforming to produce hydrogen, characterized in that: The rhodium catalyst for ethanol reforming to produce hydrogen is prepared by the preparation method according to any one of claims 1 to 7.

9. The rhodium catalyst for ethanol reforming to produce hydrogen according to claim 8, characterized in that: The rhodium catalyst for ethanol reforming to produce hydrogen comprises an active component and a catalyst carrier, wherein the active component comprises Rh and La, and the catalyst carrier comprises alumina.

10. The rhodium catalyst for ethanol reforming to produce hydrogen according to claim 9, characterized in that: In the rhodium catalyst for ethanol reforming to produce hydrogen, the content of Rh is ≤1.5wt%, preferably ≤1.0wt%; Preferably, the content of La in the rhodium catalyst for ethanol reforming to produce hydrogen is 0.5-20wt%.

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