Hydrogen production cathode material based on metal organic framework, proton membrane electrolysis hydrogen production system and method

Abstract

The invention relates to the field of air hydrogen production, in particular to a hydrogen production cathode material based on a metal organic framework and a proton membrane electrolysis hydrogen production system and method. The hydrogen production cathode material based on the metal organic framework is prepared by coating a platinum substrate with an MOF-PVA solution and comprises the platinum substrate, the surface of the platinum substrate is coated with an MOF layer, and the MOF layer is used for absorbing water vapor from air, achieving continuous water supply and achieving surface in-situ hydrogen production in the proton membrane electrolysis hydrogen production process. A proton membrane electrolysis hydrogen production system based on a metal organic framework comprises a power device, a cathode material, an anode material, a proton exchange membrane, an electrolyte and an electrolytic bath, the system can effectively adsorb water vapor in a wide humidity range (10%-100% RH) through an MOF layer of the hydrogen production cathode material, and continuous hydrogen production of the system in different environments is ensured. According to the air hydrogen production technology of the system, dependence on fresh water resources is broken through, renewable energy sources such as solar energy and wind energy can be fully utilized, the green and low-carbon hydrogen production target is achieved, the influence on the environment is small, and sustainable development of the hydrogen energy industry is promoted.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen production from air, and in particular to a hydrogen production cathode material based on a metal organic framework, a proton membrane electrolysis hydrogen production system and a method. Background Art

[0002] In the context of global energy structure transformation and climate change response, finding clean and renewable energy to replace fossil fuels has become an important strategic goal for all countries. As an efficient and clean energy carrier, hydrogen energy shows great application potential. However, traditional hydrogen production methods, such as fossil fuel reforming and water electrolysis, still face many limitations.

[0003] Existing hydrogen production technologies mainly include water electrolysis, fossil fuel recombination and biohydrogen production. Although water electrolysis is a common method at present, it has the problems of high energy consumption and high cost, and has high requirements for electrode materials, and is also limited by the availability of fresh water resources. Fossil fuel recombination will produce a large amount of carbon dioxide, which is not in line with the development direction of a low-carbon economy, and is highly dependent on fossil fuels. Biohydrogen production technology is not mature enough, the hydrogen output is low, and it is difficult to achieve large-scale production. Summary of the invention

[0004] The present invention provides a hydrogen production cathode material based on a metal organic framework, a preparation method, a proton membrane electrolysis hydrogen production system and a hydrogen production method, the purpose of which is to overcome the shortcomings of existing hydrogen production technologies.

[0005] To achieve the above object, the technical solution of one aspect of the present invention is:

[0006] A hydrogen production cathode material based on a metal organic framework comprises a platinum substrate, the surface of the platinum substrate is coated with a MOF layer, the MOF layer is used to absorb water vapor from the air, achieve continuous water supply, and realize surface in-situ hydrogen production during proton membrane electrolysis hydrogen production.

[0007] In some preferred embodiments, a hydrogen-producing cathode material based on a metal organic framework, wherein the MOF material is one of MOF-303, CAU-10-H, Ni2Cl2 (BTDD), and MOF-801.

[0008] In some preferred embodiments, the MOF material is mixed with 0.5-20 wt % PVA solution for coating.

[0009] In some preferred embodiments, the mass ratio of the MOF material to the PVA solution is 1:100 to 1:10.

[0010] Another aspect of the present invention is a method for preparing a hydrogen production cathode material based on a metal organic framework, comprising the following steps:

[0011] The MOF material is mixed with a 0.5-20 wt % PVA solution at a mass ratio of 1:100 to 1:10 to prepare a MOF-PVA mixed solution;

[0012] Immersing the platinum substrate in the MOF-PVA mixed solution for coating;

[0013] The coated platinum substrate is dried to form a MOF coating, thereby obtaining the hydrogen production cathode material.

[0014] The technical solution of another aspect of the present invention is a proton membrane electrolysis hydrogen production system based on a metal organic framework, comprising a power device, a cathode material, an anode material, a proton exchange membrane, an electrolyte, and an electrolyzer; wherein:

[0015] The cathode material is the cathode material prepared as above;

[0016] The anode material is a platinum electrode;

[0017] The proton exchange membrane is located between the cathode and the anode, and is used to conduct electricity and isolate oxygen and hydrogen in the electrolysis reaction;

[0018] The electrolyte is selected from one of KOH solution, NaOH solution or concentrated sulfuric acid;

[0019] The electrolytic cell is made of materials that do not react with strong acids or bases.

[0020] In some preferred embodiments, the electrolytic cell is selected from one of polypropylene, polypropylene homopolymer, and polyethylene.

[0021] In some preferred embodiments, the power device is a solar power device, a wind power device or a tidal power device.

[0022] In some preferred embodiments, the proton exchange membrane completely separates the electrolyte, and there are multiple electrolyzers that operate in parallel to produce hydrogen by electrolysis.

[0023] Another aspect of the present invention is a method for producing hydrogen using a proton membrane electrolysis hydrogen production system based on a metal organic framework, comprising the following steps:

[0024] Place the above proton membrane electrolysis hydrogen production system under the power supply of the power device and start the electrolyzer;

[0025] Absorbing water vapor from the air through the MOF layer of the cathode material and providing it to the electrolysis process;

[0026] The cathode material and the anode material in the electrolytic cell undergo an electrolytic reaction, so that an oxidation reaction occurs on the surface of the anode material to produce oxygen, and a reduction reaction occurs on the surface of the cathode material to produce hydrogen;

[0027] The proton exchange membrane is used to conduct H+, so that the cathode and anode reactions are effectively separated.

[0028] The beneficial effects achieved by the present invention are:

[0029] The present invention optimizes the coating thickness and water vapor adsorption performance of the cathode material by combining different MOF materials with PVA solutions. The hydrogen-producing cathode material can capture water vapor directly from the air and use renewable energy for electrolysis, thus successfully achieving sustainable production of hydrogen. The air hydrogen production technology not only breaks through the dependence on fresh water resources, but also makes full use of renewable energy such as solar energy and wind energy to achieve green and low-carbon hydrogen production goals, and has less impact on the environment, which is conducive to promoting the sustainable development of the hydrogen energy industry.

[0030] By optimizing the application of MOF materials, the cathode material of the present invention can effectively adsorb water vapor in a wide humidity range (10%-100% RH), ensuring the continuous hydrogen production of the system under different environments. The concentration adjustment of the PVA solution plays a key role: a lower concentration of PVA solution is suitable for a dry environment, forming a thin but stable coating, while a higher concentration of PVA solution is suitable for humid conditions, forming a thicker coating, enhancing the durability and stability of the material in a high humidity environment. In addition, the MOF material has good thermal stability and chemical stability, which ensures the hydrogen production efficiency of the cathode material in long-term operation and ensures the high durability of the system.

[0031] On this basis, the proton membrane electrolysis hydrogen production system based on metal organic framework cathode materials proposed in the present invention realizes the continuous and environmentally friendly production of hydrogen by directly capturing fresh water from the air and combining it with the use of renewable energy (such as light energy and wind energy). This system effectively solves the problem of existing water electrolysis hydrogen production technology's dependence on fresh water resources, while avoiding the defect of producing a large amount of carbon dioxide by the recombination of fossil fuels, and overcomes the limitations of low output and difficulty in scale of biohydrogen production technology, demonstrating an efficient, environmentally friendly, and low-cost hydrogen production model, which is widely applicable to the hydrogen energy industry.

[0032] In addition, the electrolyzers in the system are configured with multiple parallel cells. By adjusting the working status of these electrolyzers, the hydrogen production can be optimized and regulated to adapt to different power supply conditions and hydrogen demand, further improving the flexibility and applicability of the system. This configuration and high adsorption capacity (2g g -1 h -1 ,H2 / MOF) combined with MOF materials, significantly increased the hydrogen production, which is particularly suitable for industrial hydrogen production needs.

[0033] By combining with renewable energy sources such as solar energy, wind energy, and tidal energy, the system improves energy utilization and meets green and low-carbon environmental protection requirements. The system uses a proton exchange membrane to ensure that hydroxide ions generate oxygen in the anode catalyst layer and hydrogen ions are reduced to generate hydrogen on the cathode surface. The hygroscopic properties of MOF materials ensure a continuous supply of water, allowing the system to operate stably under different environmental conditions. In addition, the hydrogen production system is designed for miniaturized, distributed energy systems, especially for remote areas or mobile application scenarios, providing a clean and sustainable energy solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of a proton membrane electrolysis hydrogen production system based on a metal organic framework;

[0035] Figure 2 It is a left view of the hydrogen production system;

[0036] Figure 3 is an enlarged schematic diagram of the cathode material;

[0037] In the figure, 1. cathode material; 2. anode material; 3. proton exchange membrane; 4. electrolyte; 5. electrolytic cell; 6. power device; 1-1. platinum matrix; 1-2. MOF layer. DETAILED DESCRIPTION

[0038] A metal organic framework-based hydrogen production cathode material 1 comprises a platinum substrate 1-1, the surface of the platinum substrate 1-1 is coated with a MOF layer 1-2, the MOF layer 1-2 is used to absorb water vapor from the air to achieve continuous water supply and realize surface in-situ hydrogen production during proton membrane electrolysis hydrogen production.

[0039] In some preferred embodiments, a hydrogen-producing cathode material 1 based on a metal organic framework, wherein the MOF material is one of MOF-303, CAU-10-H, Ni2Cl2 (BTDD), and MOF-801.

[0040] In some preferred embodiments, the MOF material is mixed with 0.5-20 wt % PVA solution for coating.

[0041] In some preferred embodiments, the mass ratio of the MOF material to the PVA solution is 1:100 to 1:10.

[0042] Another aspect of the present invention is a method for preparing a hydrogen production cathode material 1 based on a metal organic framework, comprising the following steps:

[0043] The MOF material is mixed with a 0.5-20 wt % PVA solution at a mass ratio of 1:100 to 1:10 to prepare a MOF-PVA mixed solution;

[0044] Immersing the platinum substrate 1-1 in the MOF-PVA mixed solution for coating;

[0045] The coated platinum substrate 1-1 is dried to form a MOF coating, thereby obtaining the hydrogen production cathode material 1.

[0046] The technical solution of another aspect of the present invention is a proton membrane electrolysis hydrogen production system based on a metal organic framework, comprising a power device 6, a cathode material 1, an anode material 2, a proton exchange membrane 3, an electrolyte 4, and an electrolytic cell 5; wherein:

[0047] The cathode material 1 is the cathode material 1 prepared as above;

[0048] The anode material 2 is a platinum electrode;

[0049] The proton exchange membrane 3 is located between the cathode and the anode, and is used to conduct electricity and isolate oxygen and hydrogen during the electrolysis reaction;

[0050] The electrolyte 4 is selected from one of KOH solution, NaOH solution or concentrated sulfuric acid;

[0051] The electrolytic cell 5 is made of a material that does not react with strong acids or strong bases.

[0052] In some preferred embodiments, the electrolytic cell 5 is selected from one of polypropylene, polypropylene homopolymer, and polyethylene.

[0053] In some preferred embodiments, the power device 6 is a solar power device 6 , a wind power device 6 , or a tidal power device 6 .

[0054] In some preferred embodiments, the proton exchange membrane 3 completely separates the electrolyte 4, and there are multiple electrolytic cells 5 that are operated in parallel to produce hydrogen by electrolysis.

[0055] Another aspect of the present invention is a method for producing hydrogen using a proton membrane electrolysis hydrogen production system based on a metal organic framework, comprising the following steps:

[0056] The above proton membrane electrolysis hydrogen production system is placed under the power supply of the power device 6, and the electrolyzer 5 is turned on;

[0057] Absorbing water vapor from the air through the MOF layer 1-2 of the cathode material 1 and providing it to the electrolysis process;

[0058] The cathode material 1 and the anode material 2 are electrolytically reacted in the electrolytic cell 5, so that an oxidation reaction occurs on the surface of the anode material 2 to produce oxygen, and a reduction reaction occurs on the surface of the cathode material 1 to produce hydrogen;

[0059] The proton exchange membrane 3 is used to conduct H+, so that the cathode and anode reactions are effectively separated.

[0060] Oxidation reaction occurs on the surface of cathode material 1: 2OH + -2e - →1 / 2O2+H2O, OH - Migrate to the anode 2.

[0061] Multiple electrolytic cells 5 are connected in parallel, and the reaction formula is 2H + +2e - →H2 achieves efficient hydrogen production. + Under the action of the proton membrane, it migrates to the cathode 1. On the contrary, an oxidation reaction occurs on the anode surface: 2OH + -2e - →1 / 2O2+H2O, OH - Migrate to the anode.

[0062] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] All raw materials of the present invention have no particular limitation on their sources, and can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0064] There is no particular limitation on the purity of all raw materials of the present invention. The present invention preferably adopts analytically pure or prepared raw materials and process of the present invention. The brands or abbreviations thereof are conventional brands or abbreviations in the art. Each brand or abbreviation is clear and definite in the field of its related use. Those skilled in the art can purchase them from the market or prepare them by conventional methods, or implement them by using corresponding equipment according to the brands, abbreviations and corresponding uses.

[0065] MOFs are commercially available (Aladdin).

[0066] Example 1: MOF-801 and PVA solution coated on the surface of platinum substrate 1-1

[0067] The present embodiment provides a hydrogen production cathode material 1 based on a metal organic framework. MOF-801 is mixed with 0.5wt% PVA solution in a mass ratio of 1:50 to form a MOF-PVA mixed solution. The platinum substrate 1-1 is immersed in the mixed solution for coating, and then dried after coating to form a uniform MOF-PVA coating. The MOF material is used to absorb water vapor from the air to ensure that in-situ hydrogen production is achieved on the surface during the subsequent proton membrane electrolysis hydrogen production process.

[0068] Example 2: MOF-303 and PVA solution coated on the surface of platinum substrate 1-1

[0069] The present embodiment provides a hydrogen production cathode material 1 based on a metal organic framework. MOF-303 is mixed with 5wt% PVA solution in a mass ratio of 1:20 to form a MOF-PVA mixed solution. The platinum substrate 1-1 is immersed in the mixed solution for coating, and then dried after coating to form a uniform MOF-PVA coating. The MOF material is used to absorb water vapor from the air to ensure that in-situ hydrogen production is achieved on the surface during the subsequent proton membrane electrolysis hydrogen production process.

[0070] Example 3: Platinum substrate 1-1 surface coated with Ni2Cl2 (BTDD) and PVA solution

[0071] The present embodiment provides a hydrogen production cathode material 1 based on a metal organic framework. Ni2Cl2 (BTDD) and 10wt% PVA solution are mixed in a mass ratio of 1:10 to form a MOF-PVA mixed solution. The platinum substrate 1-1 is immersed in the mixed solution for coating, and then dried after coating to form a uniform MOF-PVA coating. The MOF material is used to absorb water vapor from the air to ensure that in-situ hydrogen production is achieved on the surface during the subsequent proton membrane electrolysis hydrogen production process.

[0072] Example 4: MOF-801 and PVA solution coated on the surface of platinum substrate 1-1

[0073] The present embodiment provides a hydrogen production cathode material 1 based on a metal organic framework. MOF-801 is mixed with 0.5wt% PVA solution in a mass ratio of 1:100 to form a MOF-PVA mixed solution. The platinum substrate 1-1 is immersed in the mixed solution for coating, and then dried after coating to form a uniform MOF-PVA coating. The MOF material is used to absorb water vapor from the air to ensure that in-situ hydrogen production is achieved on the surface during the subsequent proton membrane electrolysis hydrogen production process.

[0074] Example 5: MOF-303 and PVA solution coated on the surface of platinum substrate 1-1

[0075] The present embodiment provides a hydrogen production cathode material 1 based on a metal organic framework. MOF-303 is mixed with 0.5wt% PVA solution in a mass ratio of 1:100 to form a MOF-PVA mixed solution. The platinum substrate 1-1 is immersed in the mixed solution for coating, and then dried after coating to form a uniform MOF-PVA coating. The MOF material is used to absorb water vapor from the air to ensure that in-situ hydrogen production is achieved on the surface during the subsequent proton membrane electrolysis hydrogen production process.

[0076] By using different MOF materials and PVA solutions, the coating thickness and the water vapor adsorption performance of the material are optimized to ensure that the system can effectively adsorb water vapor in a wide humidity range (10%-100% RH) and adapt to continuous hydrogen production in different environments. The good thermal stability and chemical stability of MOF materials enhance the durability of the entire system. Ensure the hydrogen production efficiency of the system in long-term operation. Lower concentrations of PVA solutions are suitable for drier environments, and the coating formed is thin but stable, while higher concentrations of PVA solutions form thicker coatings, which enhance the durability and stability of the material under relatively humid working conditions.

[0077] Example 6: Proton membrane electrolysis hydrogen production system using MOF-801 cathode material 1

[0078] The present embodiment provides a proton membrane electrolysis hydrogen production system based on a metal organic framework. The hydrogen production cathode material 1 in Example 1 is selected as the cathode material 1 of the electrolysis system. The system includes a cathode material 1, an anode material 2, a proton exchange membrane 3, an electrolyte 4, an electrolyzer 5 and an electric device 6, wherein the cathode material 1 is used to absorb water vapor from the air and participate in the electrolysis hydrogen production reaction, the anode material 2 is a platinum electrode, the proton exchange membrane 3 is used to conduct electricity and isolate oxygen and hydrogen, the electrolyte 4 is a KOH solution with a mass fraction of 40%, the electrolyzer 5 is made of polypropylene, and the electric device 6 is a solar power device 6.

[0079] Example 7: Proton membrane electrolysis hydrogen production system using MOF-303 cathode material 1

[0080] The present embodiment provides a proton membrane electrolysis hydrogen production system based on a metal organic framework. The hydrogen production cathode material 1 in Example 2 is selected as the cathode material 1 of the electrolysis system. The system includes a cathode material 1, an anode material 2, a proton exchange membrane 3, an electrolyte 4, an electrolyzer 5 and an electric device 6, wherein the cathode material 1 is used to absorb water vapor from the air and participate in the electrolysis hydrogen production reaction, the anode material 2 is a platinum electrode, the proton exchange membrane 3 is used to conduct electricity and isolate oxygen and hydrogen, the electrolyte 4 is a NaOH solution with a mass fraction of 40%, the material of the electrolyzer 5 is selected from polypropylene homopolymer, and the electric device 6 is a wind power device 6.

[0081] Example 8: Proton membrane electrolysis hydrogen production system using Ni2Cl2 (BTDD) cathode material 1

[0082] This embodiment provides a proton membrane electrolysis hydrogen production system based on a metal organic framework. The hydrogen production cathode material 1 in Example 3 is selected as the cathode material 1 of the electrolysis system. The system includes a cathode material 1, an anode material 2, a proton exchange membrane 3, an electrolyte 4, an electrolyzer 5 and an electric device 6, wherein the cathode material 1 is used to absorb water vapor from the air and participate in the electrolysis hydrogen production reaction, the anode material 2 is a platinum electrode, the proton exchange membrane 3 is used to conduct electricity and isolate oxygen and hydrogen, the electrolyte 4 is a concentrated sulfuric acid solution with a mass fraction of 95%, the electrolyzer 5 is made of polyethylene, and the electric device 6 is a tidal power device 6.

[0083] Example 9: Proton membrane electrolysis hydrogen production system using MOF-801 and PVA coated cathode material 1

[0084] The present embodiment provides a proton membrane electrolysis hydrogen production system based on a metal organic framework. The hydrogen production cathode material 1 in Example 4 is selected as the cathode material 1 of the electrolysis system. The system includes a cathode material 1, an anode material 2, a proton exchange membrane 3, an electrolyte 4, an electrolyzer 5 and an electric device 6, wherein the cathode material 1 is used to absorb water vapor from the air and participate in the electrolysis hydrogen production reaction, the anode material 2 is a platinum electrode, the proton exchange membrane 3 is used to conduct electricity and isolate oxygen and hydrogen, the electrolyte 4 is a KOH solution with a mass fraction of 40%, the electrolyzer 5 adopts a 6-tank parallel configuration, the material is selected from polypropylene, and the electric device 6 is a solar power device 6.

[0085] Example 10: Proton membrane electrolysis hydrogen production system using MOF-303 and PVA coated cathode material 1

[0086] The present embodiment provides a proton membrane electrolysis hydrogen production system based on a metal organic framework. The hydrogen production cathode material 1 in Example 5 is selected as the cathode material 1 of the electrolysis system. The system includes a cathode material 1, an anode material 2, a proton exchange membrane 3, an electrolyte 4, an electrolyzer 5 and an electric device 6, wherein the cathode material 1 is used to absorb water vapor from the air and participate in the electrolysis hydrogen production reaction, the anode material 2 is a platinum electrode, the proton exchange membrane 3 is used to conduct electricity and isolate oxygen and hydrogen, the electrolyte 4 is a NaOH solution with a mass fraction of 40%, the electrolyzer 5 adopts a 6-tank parallel configuration, the material is selected from polypropylene homopolymer, and the electric device 6 is a solar power device 6.

[0087] The proton membrane electrolysis hydrogen production system based on the metal organic framework cathode material 1 proposed in the present invention makes full use of the high adsorption capacity of the MOF material and can continuously absorb water vapor from the air in a wide humidity range (10%-100% RH), breaking through the dependence on fresh water resources and achieving continuous hydrogen production. The system combines high adsorption capacity (2g g -1 h -1 ,H2 / MOF) MOF materials have greatly increased hydrogen production and are particularly suitable for industrial hydrogen production needs in different environments. MOF materials have excellent thermal and chemical stability, ensuring that the system maintains 90% performance stability within 5 years, greatly improving the durability and reliability of the system.

[0088] The system also effectively improves energy utilization by combining with renewable energy such as light energy, wind energy, and tidal energy, and realizes green and low-carbon hydrogen production, which meets the requirements of modern environmental protection and sustainable energy development. The system uses proton exchange membrane 3 to ensure that hydroxide ions are catalyzed to generate oxygen in the anode catalyst layer, and hydrogen ions are reduced to generate hydrogen on the cathode surface. The hygroscopic properties of MOF materials continuously supply water, ensuring the stable operation of the system under various environmental conditions.

[0089] In addition, the hydrogen production system design is suitable for the application of small-scale, distributed energy systems, especially for remote areas or mobile application scenarios, and can provide clean and sustainable energy solutions for these areas. This design has significant advantages in promoting the development of distributed energy networks, making hydrogen production technology widely used in modern energy systems.

[0090] Comparative Example 1: Ordinary electrolysis hydrogen production system (single tank, no MOF coating)

[0091] This embodiment provides a common electrolytic hydrogen production system, and a common platinum cathode is selected as the cathode material 1 of the electrolytic system. The system includes a cathode material 1, an anode material 2, a proton exchange membrane 3, an electrolyte 4, an electrolytic cell 5 and a power device 6. The cathode material 1 is a common platinum material not coated with a MOF material, and the anode material 2 is also a platinum electrode. The proton exchange membrane 3 is used to conduct electricity and isolate oxygen and hydrogen, the electrolyte 4 is a KOH solution with a mass fraction of 40%, and the electrolytic cell 5 adopts a single-cell configuration, and the material is selected from polypropylene.

[0092] Under the conditions of ambient temperature: 25°C and voltage 2V, the hydrogen production and power consumption of Comparative Example 1 and Examples 6-10 were tested, and the experimental results are recorded in Table 1.

[0093] Table 1: Comparison of hydrogen production and electricity consumption

[0094]

[0095]

[0096] From the above content, we can know that:

[0097] Comparative Example 1: The ordinary platinum cathode system (uncoated with MOF material, single-cell configuration) has the lowest hydrogen production of 0.6 L / hour and an electrical energy consumption of 6.0 kWh / mol H2, showing a relatively low efficiency.

[0098] Examples 6-8: The single-slot configuration system using a MOF-coated cathode significantly increased hydrogen production (by about 25-40%) compared to the control group, and also reduced power consumption, especially the Ni2Cl2 (BTDD) cathode material 1 performed better under conditions of high humidity.

[0099] Examples 9-10: In the 6-tank parallel configuration, the hydrogen production increased significantly to 6.5-7.0 L / hour, and the power consumption dropped to 3.1-3.2 kWh / mol H2, which is nearly 50% lower than the ordinary system. This shows that the combination of the parallel tank configuration and the MOF coating greatly improves the hydrogen production efficiency and energy-saving effect of the system.

[0100] The above is a detailed description of the present invention, the purpose of which is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and it is not intended to limit the scope of protection of the present invention. The present invention is not limited to the above-mentioned embodiments. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hydrogen production cathode material based on a metal organic framework, characterized in that: It comprises a platinum substrate, the surface of which is coated with a MOF layer, and the MOF layer is used to absorb water vapor from the air to achieve continuous water supply and realize surface in-situ hydrogen production during proton membrane electrolysis hydrogen production.

2. The hydrogen production cathode material based on a metal organic framework according to claim 1, characterized in that: The MOF material is one of MOF-303, CAU-10-H, Ni2Cl2(BTDD), and MOF-801.

3. The hydrogen production cathode material based on a metal organic framework according to claim 1, characterized in that: The MOF material is mixed with 0.5-20 wt% PVA solution for coating.

4. The hydrogen production cathode material based on a metal organic framework according to claim 3, characterized in that: The mass ratio of the MOF material to the PVA solution is 1:100 to 1:

10.

5. A method for preparing a hydrogen production cathode material based on a metal organic framework, characterized in that: The following steps are involved: The MOF material is mixed with a 0.5-20 wt % PVA solution at a mass ratio of 1:100 to 1:10 to prepare a MOF-PVA mixed solution; Immersing the platinum substrate in the MOF-PVA mixed solution for coating; The coated platinum substrate is dried to form a MOF coating, thereby preparing the hydrogen production cathode material.

6. A proton membrane electrolysis hydrogen production system based on a metal organic framework, characterized in that: It includes power device, cathode material, anode material, proton exchange membrane, electrolyte and electrolytic cell; wherein: The cathode material is a cathode material prepared as claimed in claims 1 to 3 or claim 4; The anode material is a platinum electrode; The proton exchange membrane is located between the cathode and the anode, and is used to conduct electricity and isolate oxygen and hydrogen in the electrolysis reaction; The electrolyte is selected from one of KOH solution, NaOH solution or concentrated sulfuric acid; The electrolytic cell is made of materials that do not react with strong acids or bases.

7. The metal organic framework-based proton membrane electrolysis hydrogen production system according to claim 4, characterized in that: The electrolytic cell is selected from one of polypropylene, polypropylene homopolymer and polyethylene.

8. The metal organic framework-based proton membrane electrolysis hydrogen production system according to claim 4, characterized in that: The electric power device is a solar power device, a wind power device or a tidal power device.

9. The metal organic framework-based proton membrane electrolysis hydrogen production system according to claim 4, characterized in that: The proton exchange membrane completely separates the electrolyte, and there are multiple electrolyzers that operate in parallel to produce hydrogen by electrolysis.

10. A hydrogen production method based on a proton membrane electrolysis hydrogen production system of a metal organic framework, characterized in that: The following steps are involved: The proton membrane electrolysis hydrogen production system as claimed in claims 6-9 is placed under the supply of an electric device, and the electrolyzer is turned on; water vapor is absorbed from the air by the MOF layer of the cathode material and provided to the electrolysis process; the cathode material and the anode material in the electrolyzer undergo an electrolysis reaction, so that an oxidation reaction occurs on the surface of the anode material to produce oxygen, and a reduction reaction occurs on the surface of the cathode material to produce hydrogen; The H + The conduction effectively separates the cathode and anode reactions.

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