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CN112993284B - Electrolytic water catalyst layer and manufacturing method thereof - Google Patents

Electrolytic water catalyst layer and manufacturing method thereof Download PDF

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CN112993284B
CN112993284B CN202110153849.2A CN202110153849A CN112993284B CN 112993284 B CN112993284 B CN 112993284B CN 202110153849 A CN202110153849 A CN 202110153849A CN 112993284 B CN112993284 B CN 112993284B
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catalyst
catalyst layer
electrolyzed water
pressure
exchange resin
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CN112993284A (en
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王海波
张真荣
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Shanghai Yihydrogen Technology Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8663—Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers
    • H01M4/8673—Electrically conductive fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8663—Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/9016—Oxides, hydroxides or oxygenated metallic salts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/9075—Catalytic material supported on carriers, e.g. powder carriers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/9075—Catalytic material supported on carriers, e.g. powder carriers
    • H01M4/9083—Catalytic material supported on carriers, e.g. powder carriers on carbon or graphite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Engineering & Computer Science (AREA)
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Abstract

The invention relates to an electrolytic water catalyst layer and a manufacturing method thereof, wherein the electrolytic water catalyst layer consists of a high corrosion resistance conductive additive, a catalyst, proton exchange resin and a structure regulator; the manufacturing method comprises the following steps: mixing proton exchange resin and structure regulator powder with conductive additive; pouring the mixed suspension into a homogenizer for treatment under the pressure of 500 bar; adding the catalyst into the mixed solution, and pouring the mixed solution into a homogenizer for treatment under the pressure of 500 bar; uniformly coating the slurry on a high-temperature-resistant transfer printing back film, wherein the catalyst loading is 1-5 mg/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The coating layer is placed in a freeze dryer for drying; transferring the coating layer onto the proton membrane by hot pressing at 150 ℃ under the pressure of 2.0 MPa; compared with the prior art, the catalyst reaches the nano-scale by adopting a homogeneous mode, and the high corrosion resistance conductive additive is mixed and introduced, so that the electronic conductivity inside the catalytic layer is rapidly and effectively improved, and the catalytic activity is improved.

Description

Electrolytic water catalyst layer and manufacturing method thereof
[ technical field ]
The invention belongs to the technical field of electrolytic cells and fuel cells, and particularly relates to an electrolytic water catalyst layer and a manufacturing method thereof.
[ background Art ]
Proton Exchange Membrane (PEM) water electrolysis technology is a clean and environment-friendly hydrogen production technology. Compared with the traditional alkaline water electrolysis technology, the technology can efficiently generate high-purity hydrogen through high current density under the condition of small volume, and the advantages in the aspect of electrolysis efficiency are obvious. Therefore, the PEM water electrolysis technology provides a reliable clean hydrogen production route, truly realizes zero emission of carbon dioxide, and has important significance for guaranteeing energy safety and structural optimization in China.
The membrane electrode is a key component of the proton exchange membrane water electrolytic cell. At present, noble metals such as iridium and ruthenium are used as catalysts of commercial membrane electrodes, the loading capacity is 1.5-4.0mg/cm < 2 >, and the catalyst has a relatively large particle size and lacks of electron conductivity, so that the activity of a catalytic layer is relatively low; meanwhile, the performance of the membrane electrode is related to the activity of the catalyst, and also related to the electron and proton conduction and water and gas mass transfer in the catalytic layer, so that the membrane electrode of the fuel cell needs to have a three-phase interface structure for the electrochemical reaction. The conventional catalytic layer forms a catalytic active center by a micron-sized noble metal catalyst, and the ion exchange resin provides proton conductivity. Because of the lack of activity, many works achieve the goal of improving the reactivity by synthesizing nanoscale noble metals and loading them on a conductive carrier. However, the method cannot be applied in a large scale due to the complex process. In addition, the formed catalytic layer is usually formed by adopting a heating and drying mode, and cannot form a high-pore structure, so that mass transfer diffusion of gas and water is not facilitated.
Therefore, there is a need for a catalyst layer that enhances the mass transfer properties while increasing the utilization of the metal active material.
[ summary of the invention ]
The invention aims to solve the defects and provide an electrolyzed water catalyst layer which can quickly and effectively improve the electronic conductivity inside the catalyst layer and improve the catalytic activity.
In order to achieve the aim, an electrolyzed water catalyst layer is designed and consists of a high corrosion resistance conductive additive, a catalyst, a proton exchange resin and a structure regulator.
Preferably, the high corrosion resistance conductive additive is any one of a stable graphite sheet, a nitrogen doped graphite sheet, a carbon nanotube and a boron doped carbon material.
Preferably, the material conductivity of the highly corrosion-resistant conductive additive is >20s/cm.
Preferably, the catalyst is IrO 2 、RuO 2 、IrO 2 /M、RuO 2 One or more of/M, wherein M is an oxide or a carbon material.
Preferably, the structure regulator is one or more of polytetrafluoroethylene PTFE, polyvinylidene fluoride PVDF and perfluoroethylene propylene copolymer FEP.
Preferably, the conductive additive accounts for 5-35% of the catalyst layer by mass, the structure regulator accounts for 5-20% of the catalyst layer by mass, and the catalyst and the proton exchange resin account for 45-90% of the catalyst layer by mass.
Preferably, the mass ratio of the catalyst to the proton exchange resin is 0.6-1.
Preferably, the mass percentage of the conductive additive in the catalyst layer is 5%, the mass percentage of the structure regulator in the catalyst layer is 5%, and the mass ratio of the catalyst to the proton exchange resin is 1:1.
The invention also provides a manufacturing method of the electrolyzed water catalyst layer, which comprises the following steps:
1) Mixing proton exchange resin and structure regulator powder with conductive additive;
2) Pouring the mixed suspension obtained in the step 1) into a homogenizer, and treating under the pressure of 500 bar;
3) Adding a catalyst into the mixed solution obtained in the step 2), pouring the mixed solution into a homogenizer, and treating the mixed solution under the pressure of 500 bar;
4) Uniformly coating the slurry obtained in the step 3) on a high-temperature-resistant transfer printing back film to enable the catalyst loading to be 1-5 mg/cm 2 ；
5) The coating layer is placed in a freeze dryer for drying;
6) And transferring the coating layer onto the proton membrane by hot pressing at the temperature of 150 ℃ and the pressure of 2.0MPa of the heating plate to obtain the electrolyzed water catalytic layer.
Preferably, in step 4), the high temperature resistant transfer back film is a PTFE or FEP film.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, a homogeneous mode is adopted to enable the catalyst to reach the nano-scale, and the high corrosion resistance conductive additive is mixed and introduced, so that the electronic conductivity inside the catalytic layer can be rapidly and effectively improved, and the catalytic activity is improved; meanwhile, the invention utilizes the structure regulator to improve the porosity of the catalytic layer in a freeze drying mode, thereby improving the mass transfer performance of the catalytic layer, leading the catalytic layer to have better catalytic performance, and leading the performance of the catalytic layer to be effectively improved through the optimization of a three-phase interface.
Detailed description of the preferred embodiments
The invention provides an electrolyzed water catalyst layer which is formed by a conductive additive with high corrosion resistance and catalysisThe catalyst consists of a catalyst, proton exchange resin and a structure regulator. The high corrosion resistance conductive additive comprises stable graphite sheet, nitrogen doped graphite sheet, carbon nano tube and boron doped carbon material (such as BDD). Material conductivity of high corrosion resistant conductive additives>20s/cm. The catalyst comprises IrO 2 、RuO 2 、IrO 2 /M、RuO 2 One or more of M (M is oxide or carbon material). The structure modifier comprises one or more of Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and perfluoroethylene propylene copolymer (FEP). The mass percentage of the conductive additive in the catalyst layer is 5-35%, the mass percentage of the structure regulator in the catalyst layer is 5-20%, the mass percentage of the catalyst and the proton exchange resin in the catalyst layer is 45-90%, and the mass ratio of the catalyst and the proton exchange resin is 0.6-1.
The present invention also provides a method for manufacturing the electrolyzed water catalyst layer, comprising the steps of,
s1: mixing proton exchange resin and/or structure regulator powder with conductive additive;
s2: pouring the mixed suspension into a homogenizer for treatment under the pressure of 500 bar;
s3: adding the catalyst into the mixed solution, and pouring the mixed solution into a homogenizer for treatment under the pressure of 500 bar;
s4: uniformly coating the slurry on a high temperature resistant transfer back film, such as a PTFE or FEP film; catalyst loading is 1-5 mg/cm 2 ；
S5: the coating layer is placed in a freeze dryer for drying;
s6: and transferring the coating layer onto the proton membrane by hot pressing at the temperature of 150 ℃ and the pressure of 2.0MPa of the heating plate to obtain the electrolyzed water catalytic layer.
The invention is further illustrated below in connection with specific examples:
comparative example 1: 0.625g of ion exchange resin and 0.05g of PTFE modifier are weighed, stirred and then poured into a homogenizer and treated with 500bar pressure. Followed by the addition of 0.375g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Comparative example 2: 0.625g of ion exchange resin and 0.05g of conductive graphite were weighed, stirred, and then poured into a homogenizer for treatment with 500bar pressure. Followed by the addition of 0.375g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Comparative example 3: 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05g of PTFE are weighed, stirred and then poured into a homogenizer for treatment with 500bar pressure. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . And after drying at 80 ℃, transferring the coating layer onto the proton membrane by hot pressing at a heating plate of 150 ℃ and a pressure of 2.0MPa to obtain the electrolyzed water catalytic layer.
Comparative example 4: 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05g of PTFE were weighed, stirred and then treated with an emulsifying machine at 20000 rpm. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 1: 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05g of PTFE are weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 2: weighing 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05gPVDF, stirred and then treated with 500bar pressure. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 3: 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05g of FEP are weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 4: 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05g of PTFE are weighed, stirred and then treated with 500bar pressure. Subsequently 0.338g of RuO was added 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 5: 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05g of PTFE are weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.338g IrO 2 and/C, pouring into a homogenizer again and treating with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 6: 0.562g of ion exchange resin, 0.05g of conductive graphite and 0.05g of PTFE are weighed, stirred and then treated with 500bar pressure. Subsequently 0.338g of RuO was added 2 and/C, pouring into a homogenizer again and treating with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . Freeze drying, and heating at 150deg.C under 2.0MPaAnd transferring the coating layer onto the proton membrane through hot pressing to obtain the electrolyzed water catalytic layer.
Example 7: 0.562g of ion exchange resin, 0.05g of conductive nitrogen-doped graphite and 0.05g of PTFE are weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 8: 0.562g of ion exchange resin, 0.05g of carbon nanotubes and 0.05g of PTFE were weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 9: 0.562g of ion exchange resin, 0.05g of boron doped diamond and 0.05g of PTFE were weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.338g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 10: 0.281g of ion exchange resin, 0.35g of conductive graphite and 0.2g of PTFE were weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.169g of IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 11: 0.45g of ion exchange resin, 0.05g of conductive graphite and 0.05g of PTFE are weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.45g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
Example 12: 0.225g of ion exchange resin, 0.35g of conductive graphite and 0.2g of PTFE were weighed, stirred and then treated with 500bar pressure. Followed by the addition of 0.225g IrO 2 Poured into the homogenizer again and treated with 500bar pressure. The obtained slurry was coated on PTFE to give a catalyst loading of 1.5mg/cm 2 . After freeze drying, the coating layer is transferred onto the proton membrane by hot pressing under the condition of a heating plate of 150 ℃ and a pressure of 2.0MPa, so as to obtain the electrolyzed water catalytic layer.
The membrane electrode cathode adopts Pt/C catalyst, and the coating Pt load is 0.4mg/cm 2 。
Comparative examples 1-4 the membrane electrodes prepared in examples 1-12 were tested in the following experiments:
the electrolysis temperature is 80 ℃, and the effective electrolysis area of the electrolysis tank is 57cm 2 Test 1A/cm 2 Voltage at current density.
TABLE 1 Membrane electrode 1A/cm for each example 2 Voltage at current density:
as is clear from the test results in table 1, the addition of the conductive agent and the structure regulator effectively reduced the polarization voltage of the membrane electrode and improved the catalytic activity by freeze-drying and homogenizing in example 1, compared to comparative examples 1, 2, 3 and 4. The addition of the different structure modifiers, catalysts or conductive agents in examples 1 to 9 was effective in reducing the catalytic voltage. And compared with the proportion of different conductive agents and the proportion of ion exchange resin, the conductive agents and the structure regulator are 5%, and the membrane electrode performance is optimal when the mass ratio of the resin to the catalyst is 1:1.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the invention are intended to be equivalent substitutes and are included in the scope of the invention.

Claims (8)

1. An electrolyzed water catalyst layer characterized in that: the electrolyzed water catalyst layer consists of a high corrosion resistance conductive additive, a catalyst, proton exchange resin and a structure regulator; the structure regulator is one or more of polytetrafluoroethylene PTFE, polyvinylidene fluoride PVDF and perfluoroethylene propylene copolymer FEP;
the method for manufacturing the electrolyzed water catalyst layer comprises the following steps:
1) Mixing proton exchange resin and structure regulator powder with conductive additive;
2) Pouring the mixed suspension obtained in the step 1) into a homogenizer, and treating under the pressure of 500 bar;
3) Adding a catalyst into the mixed solution obtained in the step 2), pouring the mixed solution into a homogenizer, and treating the mixed solution under the pressure of 500 bar;
4) Uniformly coating the slurry obtained in the step 3) on a high-temperature-resistant transfer printing back film to enable the catalyst loading to be 1-5 mg/cm 2 ；
5) The coating layer is placed in a freeze dryer for drying;
6) And transferring the coating layer onto the proton membrane by hot pressing at the temperature of 150 ℃ and the pressure of 2.0MPa of the heating plate to obtain the electrolyzed water catalytic layer.
2. The electrolyzed water catalyst layer according to claim 1, wherein: the high corrosion resistance conductive additive is any one of stable graphite sheet, nitrogen doped graphite sheet, carbon nano tube and boron doped carbon material.
3. The electrolyzed water catalyst layer according to claim 2, wherein: the material conductivity of the high corrosion resistant conductive additive is >20s/cm.
4. The electrolyzed water catalyst layer according to claim 1, wherein: the catalyst is IrO 2 、RuO 2 、IrO 2 /M、RuO 2 One or more of/M, wherein M is an oxide or a carbon material.
5. The electrolyzed water catalyst layer according to claim 1, wherein: the mass percentage of the conductive additive in the catalyst layer is 5-35%, the mass percentage of the structure regulator in the catalyst layer is 5-20%, and the mass percentage of the catalyst and the proton exchange resin in the catalyst layer is 45-90%.
6. The electrolyzed water catalyst layer according to claim 5, wherein: the mass ratio of the catalyst to the proton exchange resin is 0.6-1.
7. The electrolyzed water catalyst layer according to claim 6, wherein: the mass percentage of the conductive additive in the catalyst layer is 5%, the mass percentage of the structure regulator in the catalyst layer is 5%, and the mass ratio of the catalyst to the proton exchange resin is 1:1.
8. The electrolyzed water catalyst layer according to claim 1, wherein: in the step 4), the high-temperature-resistant transfer back film is a PTFE or FEP film.
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