A proton exchange membrane electrolysis water catalyst coated proton membrane and its preparation method and membrane electrode

Abstract

The present application relates to the technical field of hydrogen production by electrolysis of water using proton exchange membranes, and specifically discloses a proton membrane coated with a catalyst for electrolysis of water using proton exchange membranes, a preparation method thereof, and a membrane electrode, wherein the proton membrane coated with a catalyst for electrolysis of water using proton exchange membranes comprises a proton exchange membrane, and anode and cathode catalyst layers located on both sides of the proton exchange membrane; the anode catalyst layer comprises an ion polymer resin, an anode catalyst, and a hydrogen removal additive; the amount of the hydrogen removal additive added is 1% to 10% of the mass of the anode catalyst. The present application adds a certain amount of hydrogen removal additive to the anode catalyst layer, optimizes the structure of the anode catalyst layer, and can significantly reduce hydrogen permeation; and the proton membrane coated with a catalyst for electrolysis of water using the above-mentioned amount of hydrogen removal additive is prepared, which has a lower cost than the widely used platinum-based hydrogen removal catalyst, and reduces the preparation cost of the proton membrane coated with a catalyst for electrolysis of water using proton exchange membranes while improving the safety of electrolyzer operation.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production by proton exchange membrane water electrolysis, and in particular to a proton membrane coated with a catalyst for proton exchange membrane water electrolysis, a preparation method thereof, and a membrane electrode. Background Art

[0002] Hydrogen is a clean and efficient energy carrier with abundant sources and renewable characteristics. Converting renewable energy into hydrogen energy through water electrolysis can effectively reduce the emission of greenhouse gases and harmful gases. Among various water electrolysis schemes, proton exchange membrane water electrolysis devices produce hydrogen more efficiently and with higher hydrogen purity, and have good adaptability to renewable clean energy with volatility and intermittency.

[0003] In the proton exchange membrane water electrolysis device, the catalyst coated proton membrane (CCM) is the core component of the water electrolysis device, which is mainly composed of the proton membrane located in the middle, and the anion and cation catalyst layers located on both sides of the proton membrane in close contact with the proton membrane. When the water electrolysis device is working, water produces and releases oxygen under the catalysis of the anode catalyst, and produces and releases hydrogen under the catalysis of the cathode catalyst. During the operation of the water electrolysis device, most of the hydrogen produced will be discharged from the electrolyzer, but a small amount of hydrogen will still be transmitted to the anode through the proton exchange membrane. There is a risk of explosion when hydrogen mixes with oxygen on the anode side. In particular, in order to improve the efficiency of the electrolyzer in actual operation, a thinner proton membrane will be used. The gas pressure on the cathode side of the electrolyzer will also be increased to facilitate the storage of hydrogen. These will further promote the penetration of hydrogen from the cathode to the anode side, increasing the operating risk of the electrolyzer.

[0004] In order to reduce the risk, researchers added a layer of hydrogen removal catalyst containing platinum in the proton exchange membrane, the anode catalyst layer, or the surface of the proton exchange membrane near the anode to catalyze the oxidation of hydrogen and reduce the hydrogen content in the oxygen on the anode side. However, this method has a complex preparation process and uses expensive and scarce platinum metal, which increases the cost of water electrolysis devices and limits the large-scale application of proton exchange membrane electrolyzers. Summary of the invention

[0005] The purpose of the present application is to overcome the deficiencies of the above-mentioned prior art and to provide a proton exchange membrane water electrolysis catalyst coated proton membrane with low cost and low hydrogen permeability, a preparation method thereof and a membrane electrode.

[0006] To achieve the above purpose, the technical solution adopted by this application is:

[0007] The present application provides a proton exchange membrane water electrolysis catalyst coated proton membrane, the proton exchange membrane water electrolysis catalyst coated proton membrane comprising a proton exchange membrane, and anode and cathode catalyst layers located on both sides of the proton exchange membrane;

[0008] The anode catalyst layer comprises an ion polymer resin, an anode catalyst and a hydrogen removal additive; the amount of the hydrogen removal additive added is 1% to 10% of the mass of the anode catalyst;

[0009] The cathode catalyst layer includes an ionomer resin and a cathode catalyst.

[0010] After extensive research and experiments, the inventors of the present application found that adding a hydrogen scavenging additive to the anode catalyst layer optimizes the structure of the anode catalyst layer and can significantly reduce hydrogen permeation; and, the use of the above-mentioned added amount of hydrogen scavenging additive to prepare a proton membrane coated with a proton exchange membrane water electrolysis catalyst has a lower cost than the widely used platinum-based hydrogen scavenging catalyst, while improving the safety of electrolytic cell operation, reducing the preparation cost of the proton membrane coated with a proton exchange membrane water electrolysis catalyst.

[0011] As a preferred embodiment of the proton exchange membrane water electrolysis catalyst coated proton membrane described in the present application, the hydrogen removal additive is a metal oxide;

[0012] The metal oxide includes at least one of niobium oxide, tantalum oxide, tungsten oxide, yttrium oxide, strontium oxide and vanadium oxide.

[0013] The hydrogen removal additive of the present application adopts metal oxide, which is a catalyst used to catalyze the oxidation of hydrogen into water. Too low content of hydrogen removal additive will lead to poor hydrogen removal effect; too high content of hydrogen removal additive will lead to reduced performance of the anode catalyst layer.

[0014] As a preferred embodiment of the catalyst-coated proton membrane for proton exchange membrane water electrolysis described in the present application, in the anode catalyst layer, the mass ratio of the ion polymer resin to the anode catalyst is (0.1-0.5):1.

[0015] The above mass ratio of ion polymer resin and anode catalyst in the anode catalyst layer of the present application can ensure that the anode catalyst layer has high proton transport capacity, mass transfer capacity and good mechanical strength, so that the proton membrane coated with the proton exchange membrane water electrolysis catalyst has good water electrolysis performance while also reducing the hydrogen permeation of the proton membrane coated with the proton exchange membrane water electrolysis catalyst.

[0016] As a preferred embodiment of the catalyst-coated proton membrane for proton exchange membrane water electrolysis described in the present application, in the anode catalyst layer, the mass ratio of the ion polymer resin to the anode catalyst is (0.2-0.4):1.

[0017] The mass ratio of the ion polymer resin and the anode catalyst is preferably the above ratio, which can make the anode catalyst layer have better proton transport capacity, mass transfer capacity and better mechanical strength, thereby making the proton exchange membrane water electrolysis catalyst coated proton membrane have better water electrolysis performance and significantly reduce hydrogen permeation.

[0018] As a preferred embodiment of the proton exchange membrane water electrolysis catalyst coated proton membrane described in the present application, in the cathode catalyst layer, the mass ratio of the ion polymer resin to the carbon carrier in the cathode catalyst is (0.6-0.9):1.

[0019] When the ion polymer resin in the cathode catalyst layer and the carbon carrier in the cathode catalyst are in the above mass ratio, it can ensure that the cathode catalyst layer has good mechanical strength, and ensure the water electrolysis performance and stability of the proton exchange membrane water electrolysis catalyst coated proton membrane.

[0020] As a preferred embodiment of the proton exchange membrane electrolysis catalyst coated proton membrane described in the present application, the anode catalyst includes an iridium-containing catalyst, and the iridium content in the anode catalyst layer is 50 to 2000 μg / cm 2 ;

[0021] The negative catalyst comprises a carbon-supported platinum catalyst, and the platinum content in the cathode catalyst layer is 100 to 1000 μg / cm 2 .

[0022] Too high an iridium content will lead to higher costs and will not significantly improve the performance of the electrolytic cell; too low a loading will lead to insufficient electrolytic cell performance, poor stability, and a short lifespan.

[0023] Too high a platinum content will increase the cost and have no significant effect on improving the performance and life of the electrolyzer. Too low a loading will limit the performance and life of the CCM.

[0024] As a preferred embodiment of the proton exchange membrane electrolysis water catalyst coated proton membrane described in the present application, the iridium-containing catalyst is IrO2, IrRuO x , IrO2 / TiO2, and at least one of metallic iridium.

[0025] Preferably, the ionomer resin is a fluorinated sulfonic acid resin, such as a perfluorosulfonic acid resin, including D2020, D2021 of Chemours, 3M Ionomer 725 & 800EW, IC154 and IC100 of AGC, D72, D79, D87, D98 of Synsqo, and the like.

[0026] As a preferred embodiment of the proton exchange membrane catalyst-coated proton membrane for proton exchange membrane water electrolysis described in the present application, the proton exchange membrane is a homogeneous proton exchange membrane with a thickness of 10 μm to 200 μm or an enhanced proton exchange membrane with a thickness of 10 μm to 200 μm.

[0027] The present application also provides a method for preparing the above-mentioned proton exchange membrane water electrolysis catalyst coated proton membrane, comprising the following steps:

[0028] S1, mixing an anode catalyst, a hydrogen scavenging additive, a solvent and an ion polymer resin to obtain an anode catalyst slurry containing the hydrogen scavenging additive, and coating the anode catalyst slurry on the surface of a proton exchange membrane to prepare an anode catalyst layer;

[0029] S2. Mix the cathode catalyst, solvent and ion polymer resin to obtain cathode catalyst slurry, and coat the cathode catalyst slurry on the other side of the proton exchange membrane to prepare a proton membrane coated with a proton exchange membrane water electrolysis catalyst; or, coat the cathode catalyst slurry on the surface of a release membrane to prepare a cathode catalyst layer, and transfer the cathode catalyst layer to the other side of the proton membrane of the anode catalyst layer by hot pressing transfer to prepare a proton membrane coated with a proton exchange membrane water electrolysis catalyst.

[0030] Preferably, the solvent is water and alcohol, and the alcohol includes but is not limited to n-propanol, isopropanol, butanol, ethanol, ethylene glycol, ethylene glycol monomethyl ether and the like.

[0031] The present application also provides a membrane electrode prepared by coating a proton membrane with the above-mentioned proton exchange membrane water electrolysis catalyst.

[0032] Compared with the prior art, this application has the following beneficial effects:

[0033] The present application provides a proton exchange membrane water electrolysis catalyst coated proton membrane and a preparation method thereof and a membrane electrode. The present application adds a certain amount of hydrogen scavenging additive to the anode catalyst layer, optimizes the structure of the anode catalyst layer, and can significantly reduce hydrogen permeation; and, the proton exchange membrane water electrolysis catalyst coated proton membrane is prepared by using the above-mentioned added amount of hydrogen scavenging additive, which has lower cost than the widely used platinum-based hydrogen scavenging catalyst, and reduces the preparation cost of the proton exchange membrane water electrolysis catalyst coated proton membrane while improving the safety of electrolytic cell operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of the proton exchange membrane water electrolysis catalyst coated with the proton membrane of the present application (1-1 is the anode catalyst layer mixed with hydrogen removal additives, 1-2 is the proton exchange membrane, and 1-3 is the cathode catalyst layer). DETAILED DESCRIPTION

[0035] In order to better illustrate the purpose, technical solutions and advantages of the present application, the present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] In the following examples and comparative examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are all commercially available unless otherwise specified, and the components and raw materials used in each parallel experiment are of the same type.

[0037] In the following examples, the ionomer resin used was Nafion D2020 resin from Chemours.

[0038] The proton exchange membrane electrolysis catalyst coated proton membrane of the present application includes a proton exchange membrane, and anode and cathode catalyst layers located on both sides of the proton exchange membrane. The structure diagram is shown in FIG. Figure 1 shown.

[0039] Example 1: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0040] This embodiment provides a method for preparing a proton exchange membrane coated with a catalyst for water electrolysis by a proton exchange membrane, comprising the following steps:

[0041] (1) Weigh commercial iridium oxide catalyst, niobium oxide, water, ion polymer resin solution and isopropanol (according to the formula of solid content of 20%, mass ratio of ion polymer resin to iridium oxide catalyst of 0.1:1, and mass ratio of isopropanol to water of 5:5), wherein the amount of niobium oxide added is 5% of the mass of the iridium oxide catalyst. Place ultrapure water in a mixing container and stir with a mechanical stirrer. While stirring, add each weighed substance and continue stirring for 5 minutes. After stirring is completed, disperse the slurry with a ball mill. After ball milling dispersion, mix and degas the slurry with a degasser to obtain an anode catalyst slurry. Then use a slit coater to coat the surface of the proton exchange membrane (design loading 1.25 mg Ir / cm 2 ) to obtain the anode catalyst layer.

[0042] (2) Weighing a carbon-supported platinum catalyst, n-propanol, ultrapure water, and an ionomer resin solution (based on a formula with a solid content of 10%, a mass ratio of n-propanol to water of 5:5, and a mass ratio of the ionomer resin to the carbon carrier in the carbon-supported platinum catalyst of 0.6:1); adding each weighed substance into a container and stirring to mix, then dispersing using a high-pressure shearing machine, and degassing after dispersion to obtain a cathode catalyst slurry.

[0043] The cathode slurry is coated on the other side of the proton membrane coated with the anode catalyst layer in the above step by a slit coater to obtain the final proton exchange membrane electrolysis water catalyst coated proton membrane. The cathode slurry can also be coated on the surface of the release membrane, with a designed loading of 350 μg Pt / cm 2 Then, the cathode catalyst layer is transferred to the other side of the proton membrane coated with the anode catalyst layer by hot pressing transfer to obtain the final proton exchange membrane water electrolysis catalyst coated proton membrane.

[0044] Example 2: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0045] This embodiment provides a method for preparing a proton exchange membrane coated with a catalyst for water electrolysis by a proton exchange membrane, comprising the following steps:

[0046] (1) Weigh commercial iridium oxide catalyst, niobium oxide, water, ion polymer resin solution and isopropanol (according to the formula of solid content of 20%, mass ratio of ion polymer resin to iridium oxide catalyst of 0.3:1, and mass ratio of isopropanol to water of 5:5), wherein the amount of niobium oxide added is 5% of the mass of the iridium oxide catalyst. Place ultrapure water in a mixing container and stir with a mechanical stirrer. While stirring, add each weighed substance and continue stirring for 5 minutes. After stirring is completed, disperse the slurry with a ball mill. After ball milling dispersion, mix and degas the slurry with a degasser to obtain an anode catalyst slurry. Then use a slit coater to coat the surface of the proton exchange membrane (design loading 1.25 mg Ir / cm 2 ) to obtain the anode catalyst layer.

[0047] (2) Weighing a carbon-supported platinum catalyst, n-propanol, ultrapure water, and an ionomer resin solution (based on a formula having a solid content of 10%, a mass ratio of n-propanol to water of 5:5, and a mass ratio of the ionomer resin to the carbon carrier in the carbon-supported platinum catalyst of 0.6:1); adding each weighed substance into a container and stirring to mix, then dispersing using a high-pressure shearing machine, and degassing after dispersion to obtain a cathode catalyst slurry.

[0048] The cathode slurry is coated on the other side of the proton membrane coated with the anode catalyst layer in the above step by a slit coater to obtain the final proton exchange membrane electrolysis water catalyst coated proton membrane. The cathode slurry can also be coated on the surface of the release membrane, with a designed loading of 350 μg Pt / cm 2 Then, the cathode catalyst layer is transferred to the other side of the proton membrane coated with the anode catalyst layer by hot pressing transfer to obtain the final proton exchange membrane water electrolysis catalyst coated proton membrane.

[0049] Example 3: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0050] This embodiment provides a method for preparing a proton exchange membrane coated with a catalyst for water electrolysis by a proton exchange membrane, comprising the following steps:

[0051] (1) Weigh commercial iridium oxide catalyst, niobium oxide, water, ion polymer resin solution and isopropanol (according to the formula of solid content of 20%, mass ratio of ion polymer resin to iridium oxide catalyst of 0.3:1, and mass ratio of isopropanol to water of 5:5), wherein the amount of niobium oxide added is 10% of the mass of the iridium oxide catalyst. Place ultrapure water in a mixing container and stir with a mechanical stirrer. While stirring, add each weighed substance and continue stirring for 5 minutes. After stirring is completed, disperse the slurry with a ball mill. After ball milling dispersion, mix and degas the slurry with a degasser to obtain an anode catalyst slurry. Then use a slit coater to coat the surface of the proton exchange membrane (design loading 1.25 mg Ir / cm 2 ) to obtain the anode catalyst layer.

[0052] (2) Weighing a carbon-supported platinum catalyst, n-propanol, ultrapure water, and an ionomer resin solution (based on a formula having a solid content of 10%, a mass ratio of n-propanol to water of 5:5, and a mass ratio of the ionomer resin to the carbon carrier in the carbon-supported platinum catalyst of 0.6:1); adding each weighed substance into a container and stirring to mix, then dispersing using a high-pressure shearing machine, and degassing after dispersion to obtain a cathode catalyst slurry.

[0053] The cathode slurry is coated on the other side of the proton membrane coated with the anode catalyst layer in the above step by a slit coater to obtain the final proton exchange membrane electrolysis water catalyst coated proton membrane. The cathode slurry can also be coated on the surface of the release membrane, with a designed loading of 350 μg Pt / cm 2 Then, the cathode catalyst layer is transferred to the other side of the proton membrane coated with the anode catalyst layer by hot pressing transfer to obtain the final proton exchange membrane water electrolysis catalyst coated proton membrane.

[0054] Example 4: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0055] This embodiment provides a method for preparing a proton exchange membrane coated with a catalyst for water electrolysis by a proton exchange membrane, comprising the following steps:

[0056] (1) Weigh commercial iridium oxide catalyst, niobium oxide, water, ion polymer resin solution and isopropanol (according to the formula of solid content of 20%, mass ratio of ion polymer resin to iridium oxide catalyst of 0.4:1, and mass ratio of isopropanol to water of 5:5), wherein the amount of niobium oxide added is 10% of the mass of the iridium oxide catalyst. Place ultrapure water in a mixing container and stir with a mechanical stirrer. While stirring, add each weighed substance and continue stirring for 5 minutes. After stirring is completed, disperse the slurry with a ball mill. After ball milling dispersion, mix and degas the slurry with a degasser to obtain an anode catalyst slurry. Then use a slit coater to coat the surface of the proton exchange membrane (design loading 1.25 mg Ir / cm 2 ) to obtain the anode catalyst layer.

[0057] (2) Weighing a carbon-supported platinum catalyst, n-propanol, ultrapure water, and an ionomer resin solution (based on a formula having a solid content of 10%, a mass ratio of n-propanol to water of 5:5, and a mass ratio of the ionomer resin to the carbon carrier in the carbon-supported platinum catalyst of 0.6:1); adding each weighed substance into a container and stirring to mix, then dispersing using a high-pressure shearing machine, and degassing after dispersion to obtain a cathode catalyst slurry.

[0058] The cathode slurry is coated on the other side of the proton membrane coated with the anode catalyst layer in the above step by a slit coater to obtain the final proton exchange membrane electrolysis water catalyst coated proton membrane. The cathode slurry can also be coated on the surface of the release membrane, with a designed loading of 350 μg Pt / cm 2 Then, the cathode catalyst layer is transferred to the other side of the proton membrane coated with the anode catalyst layer by hot pressing transfer to obtain the final proton exchange membrane water electrolysis catalyst coated proton membrane.

[0059] Example 5: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0060] Compared with Example 4, the difference of Example 5 is that the addition amount of niobium oxide is 1% of the mass of the iridium oxide catalyst, and the other preparation steps are the same as those of Example 4.

[0061] Example 6: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0062] Compared with Example 4, the difference of Example 6 is that the mass ratio of the ionomer resin to the catalyst is 0.2:1, and the remaining preparation steps are the same as those of Example 4.

[0063] Example 7: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0064] Compared with Example 4, the difference of Example 7 is that the mass ratio of the ionomer resin to the catalyst is 0.5:1, and the remaining preparation steps are the same as those of Example 4.

[0065] Example 8: A proton exchange membrane electrolysis catalyst coated proton membrane and its preparation method

[0066] Compared with Example 4, the difference of Example 8 is that tungsten oxide is used as the hydrogen removal additive, and the remaining preparation steps are the same as those of Example 4.

[0067] Comparative Example 1

[0068] Compared with Example 2, the difference of Comparative Example 1 is that no niobium oxide is added in the preparation method of the proton exchange membrane water electrolysis catalyst coated proton membrane, and the remaining preparation steps are the same as those of Example 2.

[0069] Comparative Example 2

[0070] Compared with Example 4, the difference of Comparative Example 2 is that the addition amount of niobium oxide is 0.1% of the mass of the iridium oxide catalyst, and the other preparation steps are the same as those of Example 4.

[0071] Comparative Example 3

[0072] Compared with Example 4, the difference of Comparative Example 3 is that the addition amount of niobium oxide is 15% of the mass of the iridium oxide catalyst, and the other preparation steps are the same as those of Example 4.

[0073] Comparative Example 4

[0074] Compared with Example 4, the difference of Comparative Example 4 is that the mass ratio of the ion polymer resin to the iridium oxide catalyst is 0.01:1, and the remaining preparation steps are the same as those of Example 4.

[0075] Comparative Example 5

[0076] Compared with Example 4, the difference of Comparative Example 5 is that the mass ratio of the ion polymer resin to the iridium oxide catalyst is 1:1, and the remaining preparation steps are the same as those of Example 4.

[0077] Comparative Example 6

[0078] Compared with Example 4, the difference of Comparative Example 6 is that tungsten carbide is used as the hydrogen removal additive, and the remaining preparation steps are the same as those of Example 4.

[0079] Determine the oxygen-hydrogen and 0.6A / cm 2 The results are shown in Table 1.

[0080] Table 1

[0081]

[0082] According to the records in Table 1, the proton exchange membrane electrolysis catalyst coated proton membrane prepared in Examples 1 to 7 of the present application has a low hydrogen content in oxygen, at 0.6 A / cm 2 , 3MPa, and the electrolytic cell voltage under 80℃ conditions is lower.

[0083] When the amount of niobium oxide added is kept consistent, the oxygen-hydrogen content of the proton exchange membrane electrolysis catalyst coated proton membrane prepared in Comparative Examples 3, 4, 6, and 7 is low, and the electrolyzer voltage is low. Among them, the effect of Examples 3 and 4 is better than that of Examples 6 and 7, indicating that the mass ratio of ion polymer resin to anode catalyst is preferably (0.2-0.4):1, which can better reduce hydrogen permeation. Compared with Examples 1-7, Comparative Example 1 does not contain a hydrogen removal additive, and the oxygen-hydrogen content of the catalyst-coated proton membrane is very high;

[0084] In Comparative Examples 2 to 3, the addition amount of the metal oxide is not within the range of 1 to 10%. Too low an amount of the dehydrogenation additive will result in poor dehydrogenation effect; too high an amount of the dehydrogenation additive will result in reduced performance of the electrolyzer.

[0085] The mass ratio of the ionomer resin to the iridium oxide catalyst in Comparative Examples 4 to 5 is not within the scope of the present application, and the water electrolysis performance of the proton exchange membrane water electrolysis catalyst coated proton membrane is inferior to that of Examples 1 to 8, and the hydrogen permeation is relatively high.

[0086] Comparative Example 6 uses other types of hydrogen-scavenging additives in the preparation process of proton exchange membrane water electrolysis catalyst coated proton membrane, but the effect of reducing hydrogen permeation is not as good as that of Examples 1 to 8.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present application.

Claims

1. A proton exchange membrane water electrolysis catalyst coated proton membrane, characterized in that: The proton exchange membrane water electrolysis catalyst coated proton membrane comprises a proton exchange membrane, and anode and cathode catalyst layers located on both sides of the proton exchange membrane; The anode catalyst layer comprises an ion polymer resin, an anode catalyst and a hydrogen removal additive; the amount of the hydrogen removal additive added is 1% to 10% of the mass of the anode catalyst; The cathode catalyst layer includes an ionomer resin and a cathode catalyst.

2. The catalyst-coated proton membrane for proton exchange membrane water electrolysis according to claim 1, characterized in that: The hydrogen removal additive is a metal oxide; The metal oxide includes at least one of niobium oxide, tantalum oxide, tungsten oxide, yttrium oxide, strontium oxide and vanadium oxide.

3. The catalyst-coated proton membrane for proton exchange membrane water electrolysis according to claim 1, characterized in that: In the anode catalyst layer, the mass ratio of the ion polymer resin to the anode catalyst is (0.1-0.5):

1.

4. The catalyst-coated proton membrane for proton exchange membrane water electrolysis according to claim 3, characterized in that: In the anode catalyst layer, the mass ratio of the ion polymer resin to the anode catalyst is (0.2-0.4):

1.

5. The catalyst-coated proton membrane for proton exchange membrane water electrolysis according to claim 1, characterized in that: In the cathode catalyst layer, the mass ratio of the ion polymer resin to the carbon carrier in the cathode catalyst is (0.6-0.9):

1.

6. The catalyst-coated proton membrane for proton exchange membrane water electrolysis according to claim 1, characterized in that: The anode catalyst comprises an iridium-containing catalyst, and the iridium content in the anode catalyst layer is 50 to 2000 μg / cm 2 ; The cathode catalyst comprises a carbon-supported platinum catalyst, and the platinum content in the cathode catalyst layer is 100 to 1000 μg / cm 2 .

7. The catalyst-coated proton membrane for proton exchange membrane water electrolysis according to claim 6, characterized in that: The iridium-containing catalyst is IrO2, IrRuO x , IrO2 / TiO2, and at least one of metallic iridium.

8. The catalyst-coated proton membrane for proton exchange membrane water electrolysis according to claim 1, characterized in that: The proton exchange membrane is a homogeneous proton exchange membrane with a thickness of 10 μm to 200 μm or an enhanced proton exchange membrane with a thickness of 10 μm to 200 μm.

9. The method for preparing a catalyst-coated proton membrane for proton exchange membrane water electrolysis according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, mixing an anode catalyst, a hydrogen scavenging additive, a solvent and an ion polymer resin to obtain an anode catalyst slurry containing the hydrogen scavenging additive, and coating the anode catalyst slurry on the surface of a proton exchange membrane to prepare an anode catalyst layer; S2. Mix the cathode catalyst, solvent and ion polymer resin to obtain cathode catalyst slurry, and coat the cathode catalyst slurry on the other side of the proton exchange membrane to prepare a proton membrane coated with a proton exchange membrane water electrolysis catalyst; or, coat the cathode catalyst slurry on the surface of a release membrane to prepare a cathode catalyst layer, and transfer the cathode catalyst layer to the other side of the proton membrane of the anode catalyst layer by hot pressing transfer to prepare a proton membrane coated with a proton exchange membrane water electrolysis catalyst.

10. A membrane electrode prepared by coating a proton membrane with a proton exchange membrane water electrolysis catalyst as claimed in any one of claims 1 to 8.

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