Anode oxygen evolution catalyst for PEM water electrolysis to produce hydrogen and its preparation method and application

Abstract

The present invention relates to the field of new energy technology, discloses a kind of anode oxygen evolution catalyst and its preparation method and application of PEM water electrolysis hydrogen production, including steps: step 1, mixing a solution of platinum salt or palladium salt with a solution of iridium trichloride, adding ethylenediamine iridium organic skeleton, mixing under inert atmosphere, suction filtration, washing, drying to obtain a precursor solid; step 2, reacting the precursor solid at 100-200 DEG C under inert atmosphere to obtain the anode oxygen evolution catalyst; wherein the ethylenediamine iridium organic skeleton is prepared by mixing single (6-ethylenediamine-6-deoxy) beta cyclodextrin and iridium halide. In the present invention, the catalyst containing platinum or palladium prepared by preparing ethylenediamine iridium organic skeleton using single (6-ethylenediamine-6-deoxy) beta cyclodextrin as raw material can effectively improve the oxidation reaction speed on the prototype, increase the active sites on the catalyst surface, inhibit the deactivation of the catalyst, and is used for catalytic water electrolysis hydrogen production, with efficient and stable catalytic effect.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to an anode oxygen evolution catalyst for PEM water electrolysis hydrogen production, and a preparation method and application thereof. Background Art

[0002] With the depletion of traditional fossil energy and the increasing pressure on environmental protection, the development of environmentally friendly and economical renewable clean energy, the alleviation of the fossil energy crisis and the realization of coordinated development of energy, environment and economy have become the focus of global attention and a hot topic of scientific research.

[0003] Chinese patent publication number CN108385125A discloses a method for preparing an Au-Bi anode oxygen evolution catalyst and its application in the anode oxygen evolution reaction of water electrolysis. The preparation steps include: 1) treatment of the working electrode; 2) preparation of the electrolyte and the metal precursor; 3) in-situ preparation. The electrochemical water oxidation performance test of the Au-Bi anode oxygen evolution catalyst prepared by the present invention under the optimal preparation conditions was carried out in 0.1M K3PO4 (pH=12.4) electrolyte, and the oxygen evolution current density was 6.5mA / cm 2 ; 1mA / cm 2 The oxygen evolution overpotential at 315 mV and the Tafel slope are 43.5 mV / dec; the average oxygen evolution rate is 116.381 μmol / (cm 2 h), the Faraday efficiency reaches 90.43%. This invention first proposed an electrochemical preparation method of gold oxide under mild conditions, expanding the research scope of metal oxygen evolution catalysts.

[0004] Chinese patent publication number CN116083954A is the preparation and application of anode oxygen evolution catalysts doped with high-valent metal vanadium CoFe-MOF / NF, which belongs to the field of functional materials and energy technology. A simple solvent thermal method is used to dope high-valent metal vanadium into CoFe-MOF supported by nickel foam to prepare efficient anode oxygen evolution catalysts. Compared with the original CoFe-MOF / NF, the introduction of high-valent metal vanadium not only regulates the micromorphology of the catalyst, but also changes the charge distribution of metal ions and improves hydrophilicity, so that it not only has abundant active sites, but also vanadium improves the charge transfer rate between the catalyst and the electrolyte, making it easy to catalyze the reaction, which together reduces the OER overpotential and reduces energy consumption. The prepared V-CoFe-MOF / NF catalyst is directly used for the catalytic reaction of anode oxygen evolution, and exhibits excellent catalytic activity and long-term stability under alkaline conditions, making it have the potential for large-scale application.

[0005] Storing solar energy by electrolyzing water to produce hydrogen can effectively solve this problem, and the use of hydrogen energy is a clean and pollution-free process. However, the energy consumption of electrolyzing water to produce hydrogen is high, and the low efficiency greatly limits the development of electrolyzing water to produce hydrogen. From the perspective of the currently commonly used electrolyzing water to produce hydrogen, about 25% of the consumed electrical energy is wasted in overcoming the electrode overpotential, especially the overpotential of the anode oxygen evolution reaction (OER). Since the reaction kinetics of anode oxygen evolution are slow, which limits the rate of the entire water electrolysis reaction, it is of great significance to develop efficient and stable anode oxygen evolution electrocatalysts and reduce the anode oxygen evolution overpotential of water electrolysis to reduce the energy consumption of water electrolysis to produce hydrogen. Summary of the invention

[0006] The present invention aims to solve the problem of high overpotential in the process of hydrogen production by electrolysis of water and provides an anode oxygen evolution catalyst for hydrogen production by proton exchange membrane (PEM) water electrolysis and a preparation method thereof. The catalyst has high efficiency and stable catalytic performance, can effectively reduce the anode oxygen evolution overpotential of water electrolysis and reduce the energy consumption of hydrogen production by water electrolysis, and has important practical significance.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A method for preparing an anode oxygen evolution catalyst for PEM water electrolysis hydrogen production comprises the following steps:

[0009] Step 1, mixing a solution of a platinum salt or a palladium salt with a solution of iridium trichloride, then adding an ethylenediamine iridium organic framework, mixing under an inert atmosphere, filtering, washing, and drying to obtain a precursor solid;

[0010] Step 2, reacting the precursor solid at 100-200° C. under an inert atmosphere to obtain the anode oxygen evolution catalyst, which can be represented by Pt-Ir(IrO 2 );

[0011] The preparation method of the ethylenediamine-iridium organic framework comprises:

[0012] After mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin and iridium halide are mixed in a solvent, the mixture is reacted at a constant temperature in a reaction kettle, and the product is filtered and dried to obtain the ethylenediamino-iridium organic framework.

[0013] The catalyst of the anode oxygen evolution catalyst often collapses after a period of use, resulting in a problem of decreased catalyst performance. In the present invention, an ethylenediamine-iridium organic skeleton is prepared with mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin and iridium halide, and the organic skeleton can increase the number of active sites on the catalyst surface and improve the catalytic activity of the active sites. Inhibition of catalyst deactivation: In the electrolytic hydrogen production reaction, deactivation processes such as oxidation and structural damage are prone to occur on the anode. The organic skeleton can improve the stability of the catalyst and reduce the occurrence of deactivation. Specifically, this organic skeleton can enhance the structural stability of the catalyst by forming a stable chemical bond with the catalyst surface, and ultimately achieve efficient and stable catalytic efficiency, reduce the anode oxygen evolution overpotential of electrolytic water, and reduce the energy consumption of electrolytic water hydrogen production.

[0014] Preferably, in terms of mass fractions, in step 1, the platinum salt or palladium salt is 1-5 parts, the iridium trichloride is 2-10 parts, the ethylenediamine iridium organic framework is 0.005-0.03 parts, and the total amount of solvent in the mixed solution is 10-100 parts;

[0015] The purpose of the solvent is to fully disperse and mix the metal salt and the organic skeleton. After the mixed reaction, the product is filtered and repeatedly washed with deionized water for 1-5 times to remove impurity ions (Cl-, etc.), or the end point is when the conductivity of the mixed solution is ≤5μS / cm.

[0016] Preferably, the platinum salt is selected from chloroplatinic acid (H 2 PtCl 6 ), the palladium salt is selected from palladium acetate (Pd(OAc) 2 ). It is easily dissolved by organic solvents and can also be easily reduced to its elemental form.

[0017] Preferably, the solvent used in the solution of platinum salt or palladium salt and the iridium trichloride solution in step 1 is an aqueous solution of ethylene glycol, an aqueous solution of acetone, or an aqueous solution of n-propanol, etc. More preferably, an aqueous solution of ethylene glycol is used, wherein the volume fraction of ethylene glycol is 10-50%. Ethylene glycol is used as a solvent and also as a reducing agent, which is more conducive to the reaction.

[0018] More preferably, 1-5 parts of a platinum salt or a palladium salt are dissolved in 5-50 parts of a solvent to form a solution of a platinum salt or a palladium salt; and 2-10 parts of iridium trichloride are dissolved in 5-50 parts of a solvent to form a solution of iridium trichloride.

[0019] Preferably, the inert atmosphere comprises nitrogen, argon or helium.

[0020] The mixing time in step 1 is 10-60 minutes; the drying temperature in step 1 is 70-100° C., and the drying time is 30-120 minutes.

[0021] In step 2, the temperature rise rate of the precursor solid reaction is 1-10°C / min; the temperature is slowly raised to avoid the generation of a large amount of impurity gas. The reaction time of step 2 is 30-120min.

[0022] Preferably, in the method for preparing the ethylenediamine iridium organic skeleton, in terms of mass fractions, mono(6-ethylenediamine-6-deoxy)beta-cyclodextrin is 5-10 parts, iridium halide is 1-3 parts, and solvent is 100-120 parts.

[0023] Preferably, in the method for preparing the ethylenediamine-iridium organic skeleton, the solvent is one or more of ethylene glycol, isopropanol, n-butanol or glycerol;

[0024] Preferably, the iridium halide is iridium trichloride and / or chloroiridic acid.

[0025] Preferably, in the preparation method of the ethylenediamine iridium organic skeleton, mono(6-ethylenediamine-6-deoxy)beta-cyclodextrin and iridium halide are mixed at room temperature for 30-60 minutes; and reacted in a reactor at 100-110° C. for 10-15 hours. The raw materials are now fully mixed at room temperature to allow the iridium metal ions to be mixed or interspersed within the mono(6-ethylenediamine-6-deoxy)beta-cyclodextrin structure as much as possible, which is more conducive to the stability of iridium in the ethylenediamine iridium organic skeleton and improves the catalytic effect of the final catalyst.

[0026] Preferably, mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin and iridium halide are mixed at 25-35°C.

[0027] The present invention also provides an anode oxygen evolution catalyst for PEM water electrolysis hydrogen production prepared by the preparation method.

[0028] The present invention also provides the use of the anode oxygen evolution catalyst of the PEM water electrolysis hydrogen production in water electrolysis hydrogen production. The catalyst can effectively reduce the anode oxygen evolution overpotential of water electrolysis to reduce the energy consumption of water electrolysis hydrogen production.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The platinum or palladium-containing catalyst prepared by using mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin as a raw material to prepare an ethylenediaminoiridium organic skeleton can effectively increase the oxidation reaction rate on the prototype, increase the active sites on the catalyst surface, and inhibit the deactivation of the catalyst. It is used in catalytic water electrolysis to produce hydrogen and has an efficient and stable catalytic effect.

[0031] (2) The catalyst preparation method of the present invention has mild reaction conditions, is easy to control, has a simple process, is economical and reasonable, and has stable and efficient catalyst performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is the SEM scanning electron microscope picture of Example 1 and Example 4.

[0033] Figure 2 1 and 2 are linear sweep voltammetry curves of Example 1 and Example 4.

[0034] Figure 3 It is the Tafel curve and slope of Example 1 and Example 4.

[0035] Figure 4 1 and 2 are the voltage curves measured in the electrolytic cell of Example 1 and Example 4. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with embodiment. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Those skilled in the art can make modifications or equivalent substitutions based on the understanding of the technical scheme of the present invention without departing from the spirit and scope of the technical scheme of the present invention, and all should be included in the protection scope of the present invention.

[0037] The raw materials used in the following specific embodiments are all purchased from the market, among which mono(6-ethylenediamino-6-deoxy)-beta-cyclodextrin has a CAS No. 60984-63-6.

[0038] Example 1

[0039] 1g of chloroplatinic acid (H 2 PtCl 6 ) was dispersed in 10 g of 10% ethylene glycol aqueous solution, and 2 g of iridium trichloride (IrCl 3 ·3H 2 O) was dispersed in 10 g of a 10% ethylene glycol aqueous solution by volume. After the two solutions were mixed, 0.005 g of an ethylenediamine-based iridium organic framework was added, and the mixture was stirred at a constant speed for 30 min at room temperature in an inert atmosphere. The resulting solution was then filtered and repeatedly washed with deionized water for 4 times until the conductivity was ≤5 μS / cm to obtain a black solid, which was then dried in an oven at 80° C. for 60 min.

[0040] The dried solid was placed in a tube furnace and heated to 100°C at a uniform heating rate of 5°C / min under an argon atmosphere. The temperature was kept at this temperature for 60 min to allow the reaction to proceed fully. Pt-Ir(IrO 2 )catalyst.

[0041] The preparation method of the ethylenediamine iridium organic skeleton in this embodiment is:

[0042] 5 g of mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin, 1 g of iridium trichloride, and 100 g of ethylene glycol were added to a stirring kettle, stirred at 25° C. for 30 min, transferred to a polytetrafluoroethylene reactor, reacted at 100° C. for 10 h under nitrogen protection, taken out, cooled to room temperature, filtered, and dried to obtain an ethylenediaminoiridium organic framework.

[0043] Example 2

[0044] 3g of chloroplatinic acid (H 2 PtCl 6 ) was dispersed in 35g of 35% ethylene glycol aqueous solution, and 6g of iridium trichloride (IrCl 3 ·3H 2 O) was dispersed in 35g of 35% ethylene glycol aqueous solution, the two solutions were mixed, 0.01g of ethylenediamine iridium organic framework was added, and the mixture was stirred at a constant speed for 60min at room temperature in a helium atmosphere, and then the obtained solution was filtered and repeatedly washed with deionized water for 4 times until the conductivity was ≤5μS / cm to obtain a black solid, which was then dried in an oven at 80°C for 60min.

[0045] The dried solid was placed in a tube furnace and heated to 150°C at a uniform rate of 5°C / min under an argon atmosphere. The temperature was kept at this temperature for 90 min to allow the reaction to proceed fully. Pt-Ir(IrO 2 )catalyst.

[0046] The preparation method of the ethylenediamine iridium organic skeleton in this embodiment is:

[0047] 8 g of mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin, 2 g of iridium trichloride, and 110 g of ethylene glycol were added to a stirring kettle, stirred at 30°C for 45 min, transferred to a polytetrafluoroethylene reactor, reacted at 105°C for 12 h under nitrogen protection, taken out, cooled to room temperature, filtered, and dried to obtain an ethylenediaminoiridium organic framework.

[0048] Example 3

[0049] 5 g of chloroplatinic acid (H 2 PtCl 6 ) was dispersed in 50 g of 50% ethylene glycol aqueous solution, and 6 g of iridium trichloride (IrCl 3 ·3H 2 O) was dispersed in 50 g of 50% ethylene glycol aqueous solution by volume, the two solutions were mixed, 0.02 g of ethylenediamine iridium organic framework was added, and the mixture was stirred at a constant speed for 60 min at room temperature in an inert atmosphere, and then the obtained solution was filtered and repeatedly washed with deionized water for 4 times until the conductivity was ≤5 μS / cm to obtain a black solid, which was placed in an oven and dried at 80° C. for 60 min.

[0050] The dried solid was placed in a tube furnace and heated to 200°C at a uniform rate of 5°C / min under a nitrogen atmosphere. The temperature was kept to allow for full reaction for 45 min to obtain Pt-Ir(IrO 2 )catalyst.

[0051] The preparation method of the ethylenediamine iridium organic skeleton in this embodiment is:

[0052] 10g of mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin, 3g of iridium trichloride, and 120g of ethylene glycol were added to a stirring kettle, stirred at 35°C for 60min, transferred to a polytetrafluoroethylene reactor, reacted at a constant temperature of 110°C for 15h under nitrogen protection, taken out, cooled to room temperature, filtered, and dried to obtain an ethylenediaminoiridium organic framework.

[0053] Example 4

[0054] In this embodiment, palladium acetate (Pd(OAc) 2 ) replaces the chloroplatinic acid (H 2 PtCl 6 ), and the remaining steps are consistent with the feeding amount embodiment 1.

[0055] Example 5

[0056] In this embodiment, palladium acetate (Pd(OAc) 2 ) replaces the chloroplatinic acid (H 2 PtCl 6 ), and the remaining steps are consistent with those in Example 2.

[0057] Example 6

[0058] In this embodiment, palladium acetate (Pd(OAc) 2 ) replaces the chloroplatinic acid (H 2 PtCl 6 ), and the remaining steps are consistent with those in Example 3.

[0059] Comparative Example 1

[0060] 1g of chloroplatinic acid (H 2 PtCl 6 ) was dispersed in 10 g of 10% ethylene glycol aqueous solution, and 2 g of iridium trichloride (IrCl 3 ·3H 2O) was dispersed in 10 g of a 10% ethylene glycol aqueous solution by volume, the two solutions were mixed, stirred at a constant speed for 30 min at room temperature in a nitrogen atmosphere, and then the resulting solution was filtered and repeatedly washed with deionized water for 4 times until the conductivity was ≤5 μS / cm to obtain a black solid, which was placed in an oven and dried at 80°C for 60 min.

[0061] The dried solid was placed in a tube furnace and heated to 150°C at a uniform rate of 5°C / min under an argon atmosphere. The temperature was kept at this temperature for 60 min to allow the reaction to proceed fully. Pt-Ir(IrO 2 )catalyst.

[0062] Comparative Example 2

[0063] 1g of palladium acetate (Pd(OAc) 2 ) was dispersed in 10 g of 10% ethylene glycol aqueous solution, and 2 g of iridium trichloride (IrCl 3 ·3H 2 O) was dispersed in 10 g of a 10% by volume ethylene glycol aqueous solution, the two solutions were mixed, stirred at a constant speed for 60 min at room temperature in a nitrogen atmosphere, and then the resulting solution was filtered and repeatedly washed with deionized water for 4 times until the conductivity was ≤5 μS / cm to obtain a black solid, which was placed in an oven and dried at 80°C for 60 min.

[0064] The dried solid was placed in a tube furnace, and heated to 150° C. at a uniform heating rate of 5° C. / min under an argon atmosphere, and kept warm for 90 minutes to allow full reaction, thereby obtaining a catalyst.

[0065] Product performance evaluation:

[0066] 1. Scanning electron microscope (SEM) analysis

[0067] Scanning electron microscope (SEM) is a large analytical instrument used to reflect the ultrastructure and morphology of the sample surface. Under the action of a high electric field, the electron gun emits a high-energy electron beam, which bombards the sample surface to stimulate secondary electrons. The electron signals are collected and converted into image information to obtain a microscopic morphology image of the sample surface. SEM can display the three-dimensional morphology of the sample surface and cross-section, and can also perform component analysis on micro-areas to determine the dispersion of characteristic elements in the field of view. The surface morphology of the catalysts prepared in Example 1 and Example 4 was observed using SEM, and the results are as follows: Figure 1 shown.

[0068] 2. Linear Sweep Voltammetry (LSV)

[0069] Linear sweep voltammetry (LSV) is a method of applying a linearly changing voltage to an electrode and then recording the curve of electrode current versus electrode potential during the change of applied potential. The resulting curve of current versus potential is called a linear sweep voltammogram. Linear sweep voltammetry is a commonly used test method in electrochemical testing. When the scan rate is slow, a steady-state polarization curve of the sample can be obtained. The test is carried out at room temperature, and the activity of the catalyst can be judged by comparing the current density in the LSV curves of different samples.

[0070] The catalysts prepared in Example 1 and Example 4 were tested. The test method was as follows: at a constant temperature of 25°C, oxygen was bubbled into an electrolyte 0.5 mol / L H2SO4 solution for 30 minutes to saturate the solution with oxygen. The GC electrode coated with the catalyst was immersed in the electrolyte. The electrode surface was subjected to cyclic voltammetry scanning at a scanning rate of 50 mV / s to activate the electrode. The rotating disk electrode speed was then adjusted to 1600 rpm. At the same time, the scanning rate was changed to 5 mV / s to scan from low potential to high potential, and the test was terminated after one cycle. The voltage range was -0.25--1.65 V (vs calomel electrode). The test results are shown in the figure. Figure 2 As shown, it can be seen that the sample of Example 1 has an overpotential of 340 mV at 10 mA / cm2, and the sample of Example 4 has an overpotential of 340 mV at 10 mA / cm2. 2 The overpotential is 310mV under electric density. The performance is relatively good. This shows that the addition of ethylenediamine iridium organic skeleton can improve the performance of the catalyst.

[0071] 3. Tafel curve and slope

[0072] By converting the LSV curve, the Tafel slope and exchange current density can be obtained for mechanism analysis such as catalyst durability.

[0073] The catalysts prepared in Examples 1 and 4 were tested, and the results were as follows: Figure 3 As shown, it can be seen that the Tafel slope of Example 1 is 86.29 mV / dec, and the Tafel slope of Example 4 is 92.52 mV / dec, indicating that the addition of the ethylenediamine-iridium organic skeleton also improves the durability.

[0074] Application example: Catalyst practical performance analysis

[0075] The catalysts prepared in the examples and comparative examples were used to make membrane electrodes and assembled on electrolyzers for testing. Membrane electrode preparation process: The catalysts prepared in the examples and comparative examples were coated on proton exchange membranes using ultrasonic spraying as anodes, with a catalyst loading of 2.0 mg / cm 2 ; The purchased commercial platinum carbon was coated on the other side of the proton exchange membrane as the cathode, and the cathode platinum loading was 0.3 mg / cm2 The performance of the catalyst is summarized in Table 1. The voltage curves of Example 1 and Example 4 are shown in Table 1. Figure 4 shown.

[0076] From the above test data, it can be seen that the product yield of the embodiment of the method is high; the catalyst sample has an overpotential of less than 340mV at a current density of 10mA / cm2, and has excellent performance; the Tafel slope is small, and theoretically the durability will be good; the catalyst is used for membrane electrode production and assembled on an electrolytic cell to measure 1A / cm 2 The voltage under electrical density is ≤2.0V, with excellent performance.

[0077] Comparison of Examples 1-3 shows that as the amount of ethylenediamine iridium organic skeleton increases, the catalytic performance of the product is more excellent. Compared with Comparative Example 1, Example 1, which does not use the ethylenediamine iridium organic skeleton, has an overpotential significantly increased by nearly 200mV at a current density of 10mA / cm2; Example 4 is similar to Comparative Example 2, and the catalytic effect of the catalyst obtained in Example is significantly better.

[0078] Table 1

[0079]

[0080]

[0081] The above description is an example of a specific implementation of the present invention, which is used to more clearly illustrate the inventive concept of the present invention, but it is not used to limit the scope of the claims of the present invention. According to the inventive concept of the present invention, those skilled in the art can easily modify and amend the above-mentioned embodiments, and these modifications and variations within the inventive concept of the present invention are all included in the scope of the claims attached to the present invention.

Claims

1. A method for preparing an anode oxygen evolution catalyst for PEM water electrolysis hydrogen production, It is characterized in that Includes steps: Step 1, mixing a solution of a platinum salt or a palladium salt with a solution of iridium trichloride, then adding an ethylenediamine iridium organic framework, mixing under an inert atmosphere, filtering, washing, and drying to obtain a precursor solid; Step 2, reacting the precursor solid at 100-200° C. under an inert atmosphere to obtain the anode oxygen evolution catalyst; The preparation method of the ethylenediamine-iridium organic framework comprises: After mono(6-ethylenediamino-6-deoxy)beta-cyclodextrin and iridium halide are mixed in a solvent, the mixture is reacted at a constant temperature in a reaction kettle, and the product is filtered and dried to obtain the ethylenediamino-iridium organic framework.

2. The method for preparing the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 1, It is characterized in that In terms of weight percentage, in step 1, the platinum salt or palladium salt is 1-5 parts, the iridium trichloride is 2-10 parts, the ethylenediamine iridium organic skeleton is 0.005-0.03 parts, and the total amount of solvent in the mixed solution is 10-100 parts.

3. The method for preparing the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 1, It is characterized in that The platinum salt is selected from chloroplatinic acid, and the palladium salt is selected from palladium acetate.

4. The method for preparing the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 1, It is characterized in that The solvent used in the platinum salt or palladium salt solution and the iridium trichloride solution in step 1 is an aqueous solution of ethylene glycol, wherein the volume fraction of ethylene glycol is 10-50%.

5. The method for preparing the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 1, It is characterized in that The inert atmosphere includes nitrogen, argon or helium.

6. The method for preparing the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 1, It is characterized in that In the preparation method of the ethylenediamine iridium organic skeleton, according to the mass parts, mono(6-ethylenediamine-6-deoxy)beta-cyclodextrin is 5-10 parts, iridium halide is 1-3 parts, and solvent is 100-120 parts.

7. The method for preparing the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 1, It is characterized in that In the method for preparing the ethylenediamine-iridium organic skeleton, the solvent is one or more of ethylene glycol, isopropanol, n-butanol or glycerol; And / or, the iridium halide is iridium trichloride.

8. The method for preparing the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 1, It is characterized in that In the preparation method of the ethylenediamine iridium organic skeleton, mono(6-ethylenediamine-6-deoxy) beta-cyclodextrin and iridium halide are mixed at room temperature for 30-60 minutes; and reacted in a reaction kettle at 100-110° C. for 10-15 hours.

9. Anode oxygen evolution catalyst for PEM water electrolysis hydrogen production obtained according to the preparation method according to any one of claims 1 to 8.

10. Use of the anode oxygen evolution catalyst for PEM water electrolysis hydrogen production according to claim 9 in water electrolysis hydrogen production.

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