A method of preparing aem water electrolysis anode catalyst material and applications

Abstract

The application provides a method for preparing an AEM water electrolysis anode catalyst material and application. The method comprises the following steps: (1) mixing an iron source and a nickel source with deionized water to obtain a first solution after one-time shearing; (2) mixing nano nickel powder and an alkali solution to obtain a second solution after two-time shearing; (3) heating the second solution obtained in the step (2), then adding the first solution obtained in the step (1) into the second solution to mix, and obtaining a precursor material after reaction and post-treatment; and (4) calcining the precursor material obtained in the step (3) to obtain the AEM water electrolysis anode catalyst material. The AEM water electrolysis anode catalyst material prepared by the coprecipitation method has the advantages of simple operation, easily available raw materials and large-scale industrial production.

Description

Technical Field

[0001] This invention belongs to the field of anode catalyst material technology, specifically relating to a method for preparing AEM water electrolysis anode catalyst material and its application. Background Technology

[0002] The potential of anion exchange membrane (AEM) water electrolysis for hydrogen production lies in combining the low cost of alkaline electrolyzers with the simplicity and efficiency of PEMs. This technology can use non-precious metal catalysts, titanium-free components, and operate under differential pressure, similar to proton exchange membranes (PEMs). Currently, one of the key reasons limiting the large-scale commercialization of AEM water electrolysis for hydrogen production is its high production cost, specifically the expensive price of precious metal catalyst materials, with iridium oxide or ruthenium oxide being the most common anode catalysts.

[0003] Furthermore, the oxygen evolution reaction (OER) in electrocatalytic water splitting is typically a slow kinetic process, which often limits the overall efficiency of water electrolysis. Traditional OER catalysts are mostly rare and expensive precious metal oxides, such as RuO2 and IrO2, which severely restricts the large-scale commercial application of water electrolysis devices. For example, CN111041519A discloses a non-precious metal amorphous water electrolysis anode material, which uses an amorphous alloy strip obtained by arc melting and vacuum induction melting to form a precursor. The surface metal is then grown in situ into nickel-iron-cobalt oxides using electrochemical cyclic voltammetry, thus preparing a highly efficient in-situ grown non-precious metal water electrolysis catalyst. However, the above technical solutions suffer from disadvantages such as difficulty in industrial production and demanding preparation conditions.

[0004] Therefore, there is an urgent need in this field to develop a structurally stable non-precious metal anode catalyst material that not only has good catalytic performance, but also has an easy-to-operate preparation method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method for preparing AEM water electrolysis anode catalyst materials and their applications. The co-precipitation method provided by this invention for preparing AEM water electrolysis anode catalyst materials has the advantages of simple operation, readily available raw materials, and large-scale industrial production.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a method for preparing AEM water electrolysis anode catalyst material, the method comprising the following steps:

[0008] (1) Mix the iron source and nickel source with deionized water, and obtain the first solution after one shearing;

[0009] (2) The nano-nickel powder and alkaline solution are mixed and then sheared twice to obtain a second solution;

[0010] (3) The second solution obtained in step (2) is heated, and then the first solution obtained in step (1) is added dropwise to the second solution for mixing. After the reaction, the precursor material is obtained through post-processing.

[0011] (4) The precursor material obtained in step (3) is calcined to obtain the AEM water electrolysis anode catalyst material.

[0012] This invention synthesizes a non-precious metal anode catalyst material using a co-precipitation method. Using nano-nickel powder particles as templates, the generated nickel ferrite can uniformly coat the nano-nickel powder particles. This structure not only avoids the agglomeration of the catalyst material and exposes more catalyst active sites, but also facilitates the anode reaction of AEM water electrolysis, thereby improving the performance of water electrolysis.

[0013] In this invention, the preparation process provided by this invention is simple, convenient to operate and has high material utilization. Furthermore, the catalyst electrode has the advantages of high activity and good stability, and can be used as the anode catalyst layer of the AEM water electrolysis hydrogen production device, which significantly reduces the production cost compared to using iridium oxide or ruthenium oxide.

[0014] Preferably, the iron source in step (1) includes any one or a combination of at least two of ferric nitrate, ferric sulfate, ferric chloride, ferrous sulfate, or ferrous chloride.

[0015] Preferably, the nickel source in step (1) includes any one or a combination of at least two of nickel nitrate, nickel sulfate, nickel chloride, or nickel acetate.

[0016] Preferably, the molar ratio of the iron source and the nickel source in step (1) is 2:1.

[0017] Preferably, the cutting speed in step (1) is 1000-1600 rpm, for example, 1000 rpm, 1100 rpm, 1200 rpm, 1300 rpm, 1400 rpm, 1500 rpm, or 1600 rpm; and the time is 30-60 min, for example, 30 min, 40 min, 50 min, or 60 min.

[0018] Preferably, the particle size of the nano-nickel powder in step (2) is 50-100nm, for example, it can be 50nm, 60nm, 70nm, 80nm, 90nm, or 100nm.

[0019] Preferably, the molar ratio of the nano-nickel powder in step (2) to the iron source in step (1) is 1:1.

[0020] In this invention, by adjusting the molar ratio of nano-nickel powder and iron source, the molar ratio of iron atoms to nickel atoms in the prepared non-precious metal anode catalyst is made to be within a specific range, at which point the catalytic performance is optimal.

[0021] Preferably, the alkaline solution in step (2) includes a sodium hydroxide solution.

[0022] Preferably, the concentration of the alkaline solution in step (2) is 0.5-1 mol / L, for example, it can be 0.5 mol / L, 0.6 mol / L, 0.7 mol / L, 0.8 mol / L, 0.9 mol / L, or 1 mol / L.

[0023] Preferably, the speed of the secondary shearing in step (2) is 1000-1600 rpm, for example, 1000 rpm, 1100 rpm, 1200 rpm, 1300 rpm, 1400 rpm, 1500 rpm, or 1600 rpm; and the time is 30-60 min, for example, 30 min, 40 min, 50 min, or 60 min.

[0024] Preferably, step (3) further includes ultrasonic dispersion of the second solution before heating.

[0025] Preferably, the heating temperature in step (3) is 70-90°C, for example, 70°C, 75°C, 80°C, 85°C, or 90°C.

[0026] Preferably, the dripping rate in step (3) is 5-10 s / drop, for example, 5 s / drop, 6 s / drop, 7 s / drop, 8 s / drop, 9 s / drop, or 10 s / drop.

[0027] In this invention, the morphology of the reaction product is controlled by adjusting the dropping rate. If the dropping rate is too fast, nickel ferrite is generated too quickly, and the generated nickel ferrite does not have enough time to uniformly coat the nano-nickel powder particles, thus failing to achieve the expected morphology effect of the material. If the dropping rate is too slow, the reaction rate is too slow, and the first solution will also settle slowly, resulting in poor dispersion and failure to achieve the expected morphology effect of the material.

[0028] Preferably, the mixing in step (3) is performed under ultrasound.

[0029] Preferably, the frequency of the ultrasound is 30-50 kHz, for example, 30 kHz, 35 kHz, 40 kHz, 45 kHz, or 50 kHz.

[0030] Preferably, the reaction time in step (3) is 12-24h, for example, 12h, 16h, 18h, 20h, 22h, or 24h.

[0031] Preferably, the post-processing in step (3) includes washing and filtration.

[0032] Preferably, the calcination temperature in step (4) is 300-400℃, for example, 300℃, 320℃, 350℃, 380℃, or 400℃; and the time is 30-60min, for example, 30min, 40min, 50min, or 60min.

[0033] In a second aspect, the present invention provides an AEM water electrolysis anode catalyst material, which is prepared according to the method for preparing AEM water electrolysis anode catalyst material described in the first aspect.

[0034] Thirdly, the present invention provides a slurry of AEM water electrolysis anode catalyst material, the slurry comprising AEM water electrolysis anode catalyst material, anion exchange membrane ionomer, isopropanol and water, wherein the AEM water electrolysis anode catalyst material is the AEM water electrolysis anode catalyst material according to the second aspect.

[0035] Preferably, based on the total mass of the AEM water electrolysis anode catalyst material as 100%, the mass fraction of the anion exchange membrane ionomer is 10-20%, for example, it can be 10%, 12%, 15%, 18%, or 20%.

[0036] Fourthly, the present invention provides an AEM water electrolysis membrane electrode, the AEM water electrolysis membrane electrode comprising an anode current collector, an anode diffusion layer, an anode catalyst layer, an anion exchange membrane, a cathode current collector, a cathode diffusion layer, and a cathode catalyst layer, wherein the anode catalyst layer is prepared from a slurry of the AEM water electrolysis anode catalyst material according to the third aspect.

[0037] The non-precious metal anode catalyst prepared by this invention is applied to the anode catalyst layer of the AEM membrane electrode, which improves the water electrolysis performance of AEM and reduces the production cost.

[0038] Preferably, the loading of the anode catalyst layer is 2-4 mg / cm³. 2 For example, it can be 2mg / cm³ 2 2.5 mg / cm 2 3mg / cm 2 3.5 mg / cm 2 4mg / cm 2 The loading of the cathode catalyst layer is 0.5-1 mg / cm³. 2 For example, it can be 0.5 mg / cm³ 2 0.7 mg / cm 2 0.9 mg / cm 21mg / cm 2 .

[0039] Preferably, both the cathode current collector and the cathode diffusion layer comprise carbon cloth.

[0040] Preferably, the thickness of the carbon cloth is 0.3-0.5 mm, for example, it can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm.

[0041] Preferably, both the anode current collector and the anode diffusion layer comprise titanium felt.

[0042] Preferably, the thickness of the titanium felt is 0.3-0.5 mm, for example, it can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm.

[0043] In this invention, the thickness of the anion exchange membrane is 25-65 μm, for example, it can be 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, or 65 μm.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] This invention synthesizes a non-precious metal anode catalyst material using a co-precipitation method. Using nano-nickel powder particles as templates, the generated nickel ferrite can uniformly coat the nano-nickel powder particles. This structure not only avoids the agglomeration of the catalyst material and exposes more catalyst active sites, but also facilitates the anode reaction of AEM water electrolysis, thereby improving the performance of water electrolysis.

[0046] In this invention, the preparation process provided by this invention is simple, convenient to operate and has high material utilization. Furthermore, the catalyst electrode has the advantages of high activity and good stability, and can be used as the anode catalyst layer of the AEM water electrolysis hydrogen production device, which significantly reduces the production cost compared to using iridium oxide or ruthenium oxide. Attached Figure Description

[0047] Fig. 1 Polarization curve of the AEM water electrolysis membrane electrode provided in Application Example 1;

[0048] Fig. 2 The stability test diagram of the AEM water electrolysis membrane electrode provided in Application Example 1. Detailed Implementation

[0049] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be considered as specific limitations thereof.

[0050] Example 1

[0051] This embodiment provides an AEM water electrolysis anode catalyst material and its preparation method, which includes the following steps:

[0052] (1) Mix ferric nitrate and nickel nitrate in a molar ratio of 2:1 with deionized water, and shear at 1300 rpm for 45 min to obtain the first solution.

[0053] (2) Mix 75nm nickel nanopowder with 0.7mol / L sodium hydroxide solution, wherein the molar ratio of nickel nanopowder to ferric nitrate in step (1) is 1:1, and perform a second shearing at 1300rpm for 45min to obtain a second solution.

[0054] (3) The second solution obtained in step (2) is subjected to ultrasonic dispersion treatment, heated to 80°C, and then the first solution is added dropwise to the second solution at a rate of 7s / drop and ultrasonically mixed at a frequency of 40kHz. After reacting for 18h, the precursor material is obtained after washing and filtration and drying.

[0055] (4) The precursor material obtained in step (3) is calcined at 350°C for 45 min to obtain AEM water electrolysis anode catalyst material.

[0056] This embodiment also provides an AEM water electrolysis anode catalyst layer and its preparation method, as follows:

[0057] The above-mentioned AEM water electrolysis anode catalyst material, anion exchange membrane ionomer (with the total mass of AEM water electrolysis anode catalyst material being 100% and the mass fraction of anion exchange membrane ionomer being 15%), isopropanol, and water were mixed and sheared using a high-speed shearing machine for 30 minutes to obtain an anode catalyst layer slurry. The anode catalyst layer slurry was then sprayed onto one side of the anion exchange membrane using an ultrasonic spraying device to obtain the AEM water electrolysis anode catalyst layer.

[0058] Example 2

[0059] This embodiment provides an AEM water electrolysis anode catalyst material and its preparation method, which includes the following steps:

[0060] (1) Mix ferric nitrate and nickel nitrate in a molar ratio of 2:1 with deionized water, and shear at 1200 rpm for 40 min to obtain the first solution.

[0061] (2) Mix 65nm nickel nanopowder with 0.6mol / L sodium hydroxide solution, wherein the molar ratio of nickel nanopowder to ferric nitrate in step (1) is 1:1, and perform a second shearing at 1200rpm for 40min to obtain a second solution.

[0062] (3) The second solution obtained in step (2) is subjected to ultrasonic dispersion treatment, heated to 75°C, and then the first solution is added dropwise to the second solution at a rate of 6s / drop and ultrasonically mixed at a frequency of 35kHz. After reacting for 16h, the precursor material is obtained after washing and filtration and drying.

[0063] (4) The precursor material obtained in step (3) is calcined at 320°C for 50 min to obtain AEM water electrolysis anode catalyst material.

[0064] This embodiment also provides an AEM water electrolysis anode catalyst layer and its preparation method, as follows:

[0065] The above-mentioned AEM water electrolysis anode catalyst material, anion exchange membrane ionomer (with the total mass of AEM water electrolysis anode catalyst material being 100% and the mass fraction of anion exchange membrane ionomer being 12%), isopropanol, and water were mixed and sheared using a high-speed shearing machine for 30 minutes to obtain an anode catalyst layer slurry. The anode catalyst layer slurry was then sprayed onto one side of the anion exchange membrane using an ultrasonic spraying device to obtain the AEM water electrolysis anode catalyst layer.

[0066] Example 3

[0067] This embodiment provides an AEM water electrolysis anode catalyst material and its preparation method, which includes the following steps:

[0068] (1) Mix ferric nitrate and nickel nitrate in a molar ratio of 2:1 with deionized water, and shear at 1500 rpm for 50 min to obtain the first solution.

[0069] (2) Mix 90 nm nickel nanoparticles with a sodium hydroxide solution with a concentration of 0.8 mol / L, wherein the molar ratio of the nickel nanoparticles to the ferric nitrate in step (1) is 1:1, and perform a second shearing at 1500 rpm for 50 min to obtain a second solution.

[0070] (3) The second solution obtained in step (2) is subjected to ultrasonic dispersion treatment, heated to 85°C, and then the first solution is added dropwise to the second solution at a rate of 8s / drop and ultrasonically mixed at a frequency of 45kHz. After reacting for 20h, the precursor material is obtained after washing and filtration and drying.

[0071] (4) The precursor material obtained in step (3) is calcined at 380°C for 50 min to obtain AEM water electrolysis anode catalyst material.

[0072] This embodiment also provides an AEM water electrolysis anode catalyst layer and its preparation method, as follows:

[0073] The above-mentioned AEM water electrolysis anode catalyst material, anion exchange membrane ionomer (with the total mass of AEM water electrolysis anode catalyst material being 100% and the mass fraction of anion exchange membrane ionomer being 18%), isopropanol, and water were mixed and sheared using a high-speed shearing machine for 30 minutes to obtain an anode catalyst layer slurry. The anode catalyst layer slurry was then sprayed onto one side of the anion exchange membrane using an ultrasonic spraying device to obtain the AEM water electrolysis anode catalyst layer.

[0074] Example 4

[0075] This embodiment provides an AEM water electrolysis anode catalyst material and its preparation method, which includes the following steps:

[0076] (1) Mix ferric nitrate and nickel nitrate in a molar ratio of 2:1 with deionized water, and shear at 1000 rpm for 60 min to obtain the first solution;

[0077] (2) Mix 50 nm nickel nanoparticles with a sodium hydroxide solution with a concentration of 0.5 mol / L, wherein the molar ratio of the nickel nanoparticles to the ferric nitrate in step (1) is 1:1, and perform a second shearing at 1000 rpm for 60 min to obtain a second solution.

[0078] (3) The second solution obtained in step (2) is subjected to ultrasonic dispersion treatment, heated to 70°C, and then the first solution is added dropwise to the second solution at a rate of 5s / drop and ultrasonically mixed at a frequency of 30kHz. After reacting for 24 hours, the precursor material is obtained after washing, filtration and drying.

[0079] (4) The precursor material obtained in step (3) is calcined at 300°C for 60 min to obtain AEM water electrolysis anode catalyst material.

[0080] This embodiment also provides an AEM water electrolysis anode catalyst layer and its preparation method, as follows:

[0081] The above-mentioned AEM water electrolysis anode catalyst material, anion exchange membrane ionomer (with the total mass of AEM water electrolysis anode catalyst material being 10% and the mass fraction of anion exchange membrane ionomer being 10%), isopropanol, and water were mixed and sheared using a high-speed shearing machine for 30 minutes to obtain an anode catalyst layer slurry. The anode catalyst layer slurry was then sprayed onto one side of the anion exchange membrane using an ultrasonic spraying device to obtain the AEM water electrolysis anode catalyst layer.

[0082] Example 5

[0083] This embodiment provides an AEM water electrolysis anode catalyst material and its preparation method, which includes the following steps:

[0084] (1) Mix ferric nitrate and nickel nitrate in a molar ratio of 2:1 with deionized water, and shear at 1600 rpm for 30 min to obtain the first solution;

[0085] (2) Mix 100 nm nickel nanopowder with a sodium hydroxide solution with a concentration of 1 mol / L, wherein the molar ratio of the nickel nanopowder to the ferric nitrate in step (1) is 1:1, and perform a second shearing at 1600 rpm for 30 min to obtain a second solution.

[0086] (3) The second solution obtained in step (2) is subjected to ultrasonic dispersion treatment, heated to 90°C, and then the first solution is added dropwise to the second solution at a rate of 10s / drop and ultrasonically mixed at a frequency of 50kHz. After reacting for 12h, the precursor material is obtained after washing and filtration and drying.

[0087] (4) The precursor material obtained in step (3) is calcined at 400°C for 30 min to obtain AEM water electrolysis anode catalyst material.

[0088] This embodiment also provides an AEM water electrolysis anode catalyst layer and its preparation method, as follows:

[0089] The above-mentioned AEM water electrolysis anode catalyst material, anion exchange membrane ionomer (with the total mass of AEM water electrolysis anode catalyst material being 100% and the mass fraction of anion exchange membrane ionomer being 20%), isopropanol, and water were mixed and sheared using a high-speed shearing machine for 30 minutes to obtain an anode catalyst layer slurry. Then, the anode catalyst layer slurry was sprayed onto one side of the anion exchange membrane using an ultrasonic spraying device to obtain the AEM water electrolysis anode catalyst layer.

[0090] Example 6

[0091] The difference between this embodiment and embodiment 1 is that the cutting speed in step (1) is 500 rpm, while the rest is the same as in embodiment 1.

[0092] Example 7

[0093] The difference between this embodiment and embodiment 1 is that the cutting speed in step (1) is 2000 rpm, while the rest is the same as in embodiment 1.

[0094] Example 8

[0095] The difference between this embodiment and Example 1 is that the molar ratio of nano-nickel powder and ferric nitrate is 0.5:1, while all other aspects are the same as in Example 1.

[0096] Example 9

[0097] The difference between this embodiment and Example 1 is that the molar ratio of nano-nickel powder and ferric nitrate is 2:1, while all other aspects are the same as in Example 1.

[0098] Example 10

[0099] The difference between this embodiment and Embodiment 1 is that the second shearing speed is 500 rpm, while everything else is the same as in Embodiment 1.

[0100] Example 11

[0101] The difference between this embodiment and Embodiment 1 is that the second shearing speed is 2000 rpm, while everything else is the same as in Embodiment 1.

[0102] Example 12

[0103] The difference between this embodiment and embodiment 1 is that the dripping rate in step (3) is 2s / drop, while the rest is the same as in embodiment 1.

[0104] Example 13

[0105] The difference between this embodiment and embodiment 1 is that the dripping rate in step (3) is 15s / drop, while all other aspects are the same as in embodiment 1.

[0106] Comparative Example 1

[0107] This comparative example provides a nickel oxide anode catalyst material.

[0108] Comparative Example 2

[0109] The difference between this comparative example and Example 1 is that the addition of the first solution in step (3) is changed to the direct addition of the first solution; all other aspects are the same as in Example 1.

[0110] Application Examples 1 to 13 and Comparative Application Examples 1 to 2

[0111] The anode catalyst layers provided in Examples 1 to 13 and Comparative Examples 1 to 2 were used to prepare AEM water electrolysis membrane electrodes. The preparation methods are as follows:

[0112] Pt / C, isopropanol, water, and anion exchange membrane ionomer solution were mixed and sheared using a high-speed shearing machine to obtain a cathode catalyst slurry. This cathode catalyst slurry was then ultrasonically sprayed onto the other side of an Alkymer anion exchange membrane (45 μm thick), with the anode catalyst loading controlled at 3 mg / cm³. 2 The cathode catalyst loading was controlled at 0.8 mg / cm³. 2 The AEM water electrolysis membrane electrode can be formed by using titanium felt (0.4 mm thick) for the anode catalyst layer, anode diffusion layer and anode current collector, and carbon cloth (0.4 mm thick) for the cathode diffusion layer and cathode current collector, as provided in the examples and comparative examples, for use in AEM water electrolysis.

[0113] Test conditions

[0114] The AEM water electrolysis membrane electrodes prepared in Application Examples 1 to 13 and Comparative Application Examples 1 to 2 were installed in a single-cell electrolysis water fixture and their performance was tested. The test methods are as follows:

[0115] (1) Polarization curves: The CHI760 electrochemical workstation was used for testing. The step current method was adopted, and the system current could be increased from 0A to 4A. The polarization curves were obtained after processing.

[0116] (2) Cyclic stability: The test was conducted using a charge-discharge instrument and the timing potentiometric method was adopted. The current of the single cell of electrolyzed water was kept at 2A, and the stability test curve was obtained after processing.

[0117] The test results are shown in Table 1:

[0118] Table 1

[0119]

[0120]

[0121] As can be seen from the data in Table 1, such as Figs. 1-2 As shown, the non-precious metal anode catalyst materials provided in Application Examples 1-5 of the present invention use nano-nickel powder particles as templates, and the generated nickel ferrite can uniformly coat the nano-nickel powder particles. The above structure not only avoids the agglomeration of catalyst materials, but also exposes more catalyst active sites. Therefore, the prepared AEM water electrolyzer has good cycle stability.

[0122] Application Examples 6 to 11 demonstrate that the present invention optimizes the catalytic performance of the prepared material by controlling the shear rate and the molar ratio of nano-nickel powder to iron source, while simultaneously controlling the dropping rate to regulate the morphology of the reaction product. Application Examples 12 and 13 demonstrate that controlling the dropping rate regulates the morphology of the reaction product. If the dropping rate is too fast, nickel ferrite is formed too quickly, and the formed nickel ferrite does not have enough time to uniformly coat the nano-nickel powder particles, thus failing to achieve the desired morphology of the material. If the dropping rate is too slow, the reaction rate is too slow, and the first solution will also settle slowly, resulting in poor dispersion and failing to achieve the desired morphology of the material.

[0123] The applicant declares that the present invention is illustrated by the above embodiments, but the present invention is not limited to the above process steps, that is, it does not mean that the present invention must rely on the above process steps to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of the raw materials used in the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for preparing nickel ferrite catalyst material for AEM water electrolysis anodes, characterized in that, The method includes the following steps: (1) Mix the iron source and nickel source with deionized water, and obtain the first solution after one shearing; (2) The nano-nickel powder and alkaline solution are mixed and then sheared twice to obtain a second solution; (3) The second solution obtained in step (2) is heated, and then the first solution obtained in step (1) is added dropwise to the second solution for mixing. After the reaction, the precursor material is obtained through post-processing. (4) The precursor material obtained in step (3) is calcined to obtain the AEM water electrolysis anode catalyst material; The molar ratio of the nano-nickel powder in step (2) to the iron source in step (1) is 1:1; The concentration of the alkaline solution in step (2) is 0.5-1 mol / L.

2. The method according to claim 1, characterized in that, The iron source mentioned in step (1) includes any one or a combination of at least two of ferric nitrate, ferric sulfate, ferric chloride, ferrous sulfate, or ferrous chloride.

3. The method according to claim 1, characterized in that, The nickel source mentioned in step (1) includes any one or a combination of at least two of nickel nitrate, nickel sulfate, nickel chloride, or nickel acetate.

4. The method according to claim 1, characterized in that, The molar ratio of the iron source and the nickel source in step (1) is 2:

1.

5. The method according to claim 1, characterized in that, The cutting speed in step (1) is 1000-1600 rpm and the time is 30-60 min.

6. The method according to claim 1, characterized in that, The particle size of the nano-nickel powder mentioned in step (2) is 50-100 nm.

7. The method according to claim 1, characterized in that, The alkaline solution mentioned in step (2) includes sodium hydroxide solution.

8. The method according to claim 1, characterized in that, The second shearing speed in step (2) is 1000-1600 rpm, and the time is 30-60 min.

9. The method according to claim 1, characterized in that, The step (3) before heating also includes ultrasonic dispersion of the second solution.

10. The method according to claim 1, characterized in that, The heating temperature in step (3) is 70-90℃.

11. The method according to claim 1, characterized in that, The dripping rate in step (3) is 5-10 s / drop.

12. The method according to claim 1, characterized in that, The mixing described in step (3) is performed under ultrasound.

13. The method according to claim 12, characterized in that, The frequency of the ultrasound is 30-50 kHz.

14. The method according to claim 1, characterized in that, The reaction time in step (3) is 12-24 hours.

15. The method according to claim 1, characterized in that, The post-processing in step (3) includes washing and filtration.

16. The method according to claim 1, characterized in that, The calcination temperature in step (4) is 300-400℃ and the time is 30-60min.

17. A nickel ferrite anode catalyst material for AEM water electrolysis, characterized in that, The AEM water electrolysis anode catalyst material is prepared by the method for preparing AEM water electrolysis anode nickel ferrite catalyst material according to any one of claims 1-16.

18. A slurry of nickel ferrite, an anode catalyst material for AEM water electrolysis, characterized in that, The slurry of the AEM water electrolysis anode catalyst material includes nickel ferrite, anion exchange membrane ionomer, isopropanol, and water, wherein the nickel ferrite is the nickel ferrite of the AEM water electrolysis anode catalyst material according to claim 17.

19. The slurry of the AEM water electrolysis anode catalyst material according to claim 18, characterized in that, Based on the total mass of the AEM water electrolysis anode catalyst material being 100%, the mass fraction of the anion exchange membrane ionomer is 10-20%.

20. An AEM water electrolysis membrane electrode, characterized in that, The AEM water electrolysis membrane electrode includes an anode current collector, an anode diffusion layer, an anode catalyst layer, an anion exchange membrane, a cathode current collector, a cathode diffusion layer, and a cathode catalyst layer. The anode catalyst layer is prepared from a slurry of the AEM water electrolysis anode catalyst material according to claim 18 or 19.

21. The AEM water electrolysis membrane electrode according to claim 20, characterized in that, The loading of the anode catalyst layer is 2-4 mg / cm³. 2 The loading of the cathode catalyst layer is 0.5-1 mg / cm³. 2 .

22. The AEM water electrolysis membrane electrode according to claim 20, wherein both the cathode current collector and the cathode diffusion layer comprise carbon cloth.

23. The AEM water electrolysis membrane electrode according to claim 22, wherein the thickness of the carbon cloth is 0.3-0.5 mm.

24. The AEM water electrolysis membrane electrode according to claim 20, wherein both the anode current collector and the anode diffusion layer comprise titanium felt.

25. The AEM water electrolysis membrane electrode according to claim 24, wherein the thickness of the titanium felt is 0.3-0.5 mm.

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