Preparation method of proton exchange membrane loaded platinum nanoparticles
The proton exchange membrane with platinum-loaded nanoparticles was prepared by immersion of NaOH solution, impregnation of platinum and reducing solution reduction reaction, which solved the problem of lack of effective preparation methods in the prior art, and achieved the improvement of oxygen purity and safety and reliability of pure water electrolytic cells under high pressure.
Patent Information
- Application Number
- CN202411475217.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-02-25
AI Technical Summary
There is no effective preparation method for the proton exchange membrane-loaded platinum nanoparticles in the prior art, resulting in a decrease in the oxygen purity of the pure water electrolytic cell under high pressure, and its safety and reliability are affected.
Proton exchange membranes loaded with platinum nanoparticles were prepared by immersion treatment of NaOH solution, impregnation treatment of platinum impregnation treatment and reduction solution. The method includes soaking the proton exchange membrane in NaOH solution, then immersing platinum in H2PtCl6 solution, and performing a reduction reaction in a mixed solution of NaOH and NaBH4, and finally rinsing with pure water to obtain the proton exchange membrane loaded with platinum nanoparticles.
This method effectively reduces the water electrolytic voltage and hydrogen content in oxygen, improves the hydrogen elimination catalytic activity and performance stability of the proton exchange membrane, and is suitable for high-pressure pure water electrolytic cells.
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Figure CN119506971A_ABST
Abstract
Description
Technical field:
[0001] The invention relates to the field of proton exchange membrane processing, in particular to a method for preparing proton exchange membrane-loaded platinum nanoparticles. Background technology:
[0002] Water electrolysis hydrogen production technology is a green, safe and mature hydrogen production method with the advantages of simple process, high degree of automation and high hydrogen purity. Among them, pure water electrolysis hydrogen production technology has attracted much attention due to its high current density and low energy consumption, and is a green hydrogen production technology with great development prospects. Pure water electrolysis technology uses pure water electrolyzer as the core component, solid polymer electrolyte membrane as a new diaphragm material, and precious metal catalysts as hydrogen and oxygen evolution catalytic materials, which can be used to prepare high-purity hydrogen and oxygen.
[0003] Under higher operating pressure, the mutual permeation of hydrogen and oxygen through the proton exchange membrane of pure water electrolyzer increases significantly, resulting in reduced oxygen purity and affecting safety and reliability, which seriously limits its application under high pressure. At present, the key to reducing the amount of hydrogen permeation in the oxygen side is to eliminate the permeated hydrogen, which is mainly achieved by doping hydrogen removal catalysts on the membrane substrate to catalyze the in-situ reaction of H2 and O2 diffused from the anode and cathode to the proton exchange membrane respectively. Research and development of high-performance hydrogen removal catalysts doped in the proton exchange membrane substrate and used as the diaphragm of pure water electrolyzer can effectively eliminate hydrogen permeated through the membrane, while reducing the internal resistance of the proton exchange membrane and the water decomposition voltage.
[0004] Platinum, palladium and other precious metals have good dehydrogenation catalytic performance and are currently widely used commercial dehydrogenation catalysts. They are dispersed in the form of nanoparticles in the proton exchange membrane matrix to expose more active sites of the catalyst, thereby improving its dehydrogenation catalytic activity. The impregnation reduction method is a treatment method in which the active components are attached to the solid in the form of ions or compounds to obtain a highly dispersed carrier catalyst.
[0005] There is an urgent need for a method for preparing proton exchange membrane-loaded platinum nanoparticles, which will help solve the technical problem that there is no method for preparing loaded platinum nanoparticles in the prior art. Summary of the invention:
[0006] In one embodiment, the present invention provides a method for preparing proton exchange membrane-loaded platinum nanoparticles, which helps solve the technical problem that there is no method for preparing loaded platinum nanoparticles in the prior art through NaOH solution and impregnation of platinum, as well as treatment with a reducing solution.
[0007] The preparation method of the proton exchange membrane-loaded platinum nanoparticles comprises:
[0008] The proton exchange membrane is immersed in a NaOH solution;
[0009] After the immersion treatment, the proton exchange membrane is subjected to a platinum impregnation treatment;
[0010] After the platinum impregnation treatment, the proton exchange membrane is immersed in a reducing solution for a reduction reaction to obtain a proton exchange membrane loaded with platinum nanoparticles.
[0011] In one embodiment, before the step of immersing the proton exchange membrane in a NaOH solution, the method further comprises:
[0012] Pretreatment to eliminate inorganic metal ions and organic impurities on the surface of proton exchange membranes.
[0013] In one embodiment, the NaOH solution is a 0.05-0.2 mol / L NaOH solution, the treatment temperature is 10-40° C., and the treatment time is 0.5-5 h.
[0014] In one embodiment, the platinum immersion solution is H 2 PtCl 6 Solution, concentration is 0.01-0.05mol / L, treatment temperature is 50-80℃, treatment time is 0.5-5h.
[0015] In one embodiment, the reducing solution has a concentration of 0.05-0.2 mol / L NaOH and a concentration of 0.6-0.8 mol / L NaBH 4 The reduction reaction temperature is 50-80°C and the reaction time is 0.5-5h.
[0016] In one embodiment, after the platinum impregnation treatment, the proton exchange membrane is immersed in a reducing solution for reduction reaction to obtain a proton exchange membrane loaded with platinum nanoparticles, and the method further comprises:
[0017] The proton exchange membrane loaded with platinum nanoparticles is obtained by washing with pure water.
[0018] In one embodiment, the preprocessing further comprises:
[0019] Treating the proton exchange membrane in a hydrogen peroxide solution and a sulfuric acid solution respectively, wherein the concentration of the hydrogen peroxide solution is 3%-5%, the concentration of the sulfuric acid solution is 0.5-1 mol / L, the temperature for treating the two solutions is 80-100°C, and the treatment time is 0.5-2h;
[0020] After treatment, the proton exchange membrane is rinsed with pure water to eliminate acidic residues on the surface.
[0021] In one embodiment, the preprocessing further comprises:
[0022] The proton exchange membrane was treated in a 3% hydrogen peroxide solution and a 1 mol / L sulfuric acid solution at 80° C. for 1 hour, respectively. After the treatment, the proton exchange membrane was rinsed with pure water.
[0023] In one embodiment, the NaOH solution treatment concentration is 0.1 mol / L, the treatment temperature is 25° C., and the treatment time is 1 h.
[0024] In one embodiment, the concentration of the H2PtCl6 solution treated with platinum impregnation is 0.01 mol / L, the treatment temperature is 60°C, and the treatment time is 1 h;
[0025] The reaction solution for the reduction reaction is 0.1 mol / L NaOH and 0.8 mol / L NaBH 4 The reaction temperature was 60°C and the reaction time was 1h. Description of the drawings:
[0026] Figure 1 This is a schematic diagram of the SEM morphology of the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1;
[0027] Figure 2 Schematic diagram of EDS spectrum analysis of the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1;
[0028] Figure 3 Schematic diagram of the curve of the change of the cell voltage versus current when the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1 is applied to a pure water electrolyzer;
[0029] Figure 4 This is a schematic diagram of the curve of the change of hydrogen in oxygen over the operating time when the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1 is applied to a pure water electrolyzer. Specific embodiment:
[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0031] Various aspects and features of the present application are described herein with reference to the accompanying drawings.
[0032] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.
[0033] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.
[0034] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
[0035] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.
[0036] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.
[0037] The present invention adopts an impregnation reduction preparation process, and carries out a preparation process of loading platinum nanoparticles on a proton exchange membrane by controlling processes such as the impregnation time, the reduction time, and the reduction temperature. The preparation process is applied to the field of pure water electrolysis hydrogen production, and exhibits good performance in a pure water electrolyzer, reduces the water electrolysis voltage, reduces the hydrogen content in oxygen, and obtains excellent performance.
[0038] Figure 1 This is a schematic diagram of the SEM morphology of the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1; Figure 2 Schematic diagram of EDS spectrum analysis of the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1; Figure 3 Schematic diagram of the curve of the change of the cell voltage versus current when the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1 is applied to a pure water electrolyzer; Figure 4 This is a schematic diagram of the change curve of hydrogen in oxygen over the operating time when the proton exchange membrane loaded with platinum nanoparticles prepared in Example 1 is applied to a pure water electrolyzer. Figures 1 to 4 As shown, in one embodiment, the present invention provides a method for preparing proton exchange membrane-supported platinum nanoparticles, the method for preparing proton exchange membrane-supported platinum nanoparticles comprising:
[0039] S101, immersing the proton exchange membrane in a NaOH solution.
[0040] The steps provide a specific step of immersing the proton exchange membrane in a NaOH solution.
[0041] S102, after the immersion treatment, the proton exchange membrane is impregnated with platinum.
[0042] The steps provide a specific step of subjecting the proton exchange membrane to platinum impregnation treatment after the immersion treatment.
[0043] S103, after the platinum immersion treatment, the proton exchange membrane is immersed in a reducing solution for a reduction reaction to obtain a proton exchange membrane loaded with platinum nanoparticles.
[0044] This step provides a specific step of immersing the proton exchange membrane in a reducing solution after the platinum impregnation treatment to perform a reduction reaction to obtain a proton exchange membrane loaded with platinum nanoparticles.
[0045] In this embodiment, a specific implementation method of a method for preparing a proton exchange membrane loaded with platinum nanoparticles is provided.
[0046] In one embodiment, before the step of immersing the proton exchange membrane in a NaOH solution, the method further comprises:
[0047] Pretreatment to eliminate inorganic metal ions and organic impurities on the surface of proton exchange membranes.
[0048] In one embodiment, the NaOH solution is a 0.05-0.2 mol / L NaOH solution, the treatment temperature is 10-40° C., and the treatment time is 0.5-5 h.
[0049] In one embodiment, the platinum immersion solution is H 2 PtCl 6 Solution, concentration is 0.01-0.05mol / L, treatment temperature is 50-80℃, treatment time is 0.5-5h.
[0050] In one embodiment, the reducing solution has a concentration of 0.05-0.2 mol / L NaOH and a concentration of 0.6-0.8 mol / L NaBH 4 The reduction reaction temperature is 50-80°C and the reaction time is 0.5-5h.
[0051] In one embodiment, after the platinum impregnation treatment, the proton exchange membrane is immersed in a reducing solution for reduction reaction to obtain a proton exchange membrane loaded with platinum nanoparticles, and the method further comprises:
[0052] The proton exchange membrane loaded with platinum nanoparticles is obtained by washing with pure water.
[0053] In one embodiment, the preprocessing further comprises:
[0054] Treating the proton exchange membrane in a hydrogen peroxide solution and a sulfuric acid solution respectively, wherein the concentration of the hydrogen peroxide solution is 3%-5%, the concentration of the sulfuric acid solution is 0.5-1 mol / L, the temperature for treating the two solutions is 80-100°C, and the treatment time is 0.5-2h;
[0055] After treatment, the proton exchange membrane is rinsed with pure water to eliminate acidic residues on the surface.
[0056] After the proton exchange membrane is treated with NaOH solution and impregnated with platinum, the membrane surface is rinsed with pure water.
[0057] In one embodiment, the preprocessing further comprises:
[0058] The proton exchange membrane was treated in a 3% hydrogen peroxide solution and a 1 mol / L sulfuric acid solution at 80° C. for 1 hour, respectively. After the treatment, the proton exchange membrane was rinsed with pure water.
[0059] In one embodiment, the NaOH solution treatment concentration is 0.1 mol / L, the treatment temperature is 25° C., and the treatment time is 1 h.
[0060] In one embodiment, the concentration of the H2PtCl6 solution treated with platinum impregnation is 0.01 mol / L, the treatment temperature is 60°C, and the treatment time is 1 h;
[0061] The reaction solution of the reduction reaction is a mixture of 0.1 mol / L NaOH and 0.8 mol / L NaBH4, the reaction temperature is 60°C, and the reaction time is 1 h.
[0062] Example 1
[0063] The proton exchange membrane was pretreated by treating the proton exchange membrane in 3% hydrogen peroxide solution and 1 mol / L sulfuric acid solution at 80°C for 1 hour, and then rinsing the proton exchange membrane with pure water. The pretreated proton exchange membrane was then treated with a NaOH solution at a concentration of 0.1 mol / L, a treatment temperature of 25°C, and a treatment time of 1 hour, and the treated membrane was rinsed with pure water.
[0064] Then the proton exchange membrane was placed in a H2PtCl6 solution for platinum immersion treatment. The concentration of the H2PtCl6 solution for platinum immersion treatment was 0.01 mol / L, the treatment temperature was 60°C, the treatment time was 1 h, and the surface of the treated membrane was rinsed again with pure water.
[0065] The proton exchange membrane is then immersed in a mixed solution of 0.1 mol / L NaOH and 0.8 mol / L NaBH4 for reduction reaction at a reaction temperature of 60°C for 1 h. The membrane is taken out and rinsed with pure water to obtain a platinum nanoparticle-loaded proton exchange membrane for a pure water hydrogen production electrolyzer.
[0066] Example 2
[0067] The proton exchange membrane was pretreated by treating the proton exchange membrane in 3% hydrogen peroxide solution and 1 mol / L sulfuric acid solution at 80°C for 1 hour, and then rinsing the proton exchange membrane with pure water. The pretreated proton exchange membrane was then treated with a NaOH solution at a concentration of 0.2 mol / L, a treatment temperature of 25°C, and a treatment time of 0.5 hours. The treated membrane was rinsed with pure water.
[0068] Then the proton exchange membrane was placed in a H2PtCl6 solution for platinum immersion treatment. The concentration of the H2PtCl6 solution for platinum immersion treatment was 0.03 mol / L, the treatment temperature was 60°C, and the treatment time was 0.5 h. The surface of the treated membrane was rinsed again with pure water.
[0069] The proton exchange membrane is then immersed in a mixed solution of 0.1 mol / L NaOH and 0.8 mol / L NaBH4 for reduction reaction at a reaction temperature of 60°C for 5 hours. The membrane is taken out and rinsed with pure water to obtain a platinum nanoparticle-loaded proton exchange membrane for a pure water hydrogen production electrolyzer.
[0070] Example 3
[0071] The proton exchange membrane was pretreated by treating the proton exchange membrane in 3% hydrogen peroxide solution and 1 mol / L sulfuric acid solution at 80°C for 1 hour, and then rinsing the proton exchange membrane with pure water. The pretreated proton exchange membrane was then treated with a NaOH solution at a concentration of 0.05 mol / L, a treatment temperature of 25°C, and a treatment time of 5 hours. The treated membrane was rinsed with pure water.
[0072] Then the proton exchange membrane was placed in a H2PtCl6 solution for platinum immersion treatment. The concentration of the H2PtCl6 solution for platinum immersion treatment was 0.05 mol / L, the treatment temperature was 80°C, and the treatment time was 0.5 h. The surface of the treated membrane was rinsed again with pure water.
[0073] The proton exchange membrane is then immersed in a mixed solution of 0.1 mol / L NaOH and 0.8 mol / L NaBH4 for reduction reaction at a reaction temperature of 80°C for 0.5 h. The membrane is taken out and rinsed with pure water to obtain a platinum nanoparticle-loaded proton exchange membrane for a pure water hydrogen production electrolyzer.
[0074] First, the proton exchange membrane is pretreated to eliminate the contamination of inorganic metal ions and organic impurities on the membrane surface. The treated proton exchange membrane is immersed in a 0.05-0.2mol / L NaOH solution at 10-40℃ for 0.5-5h. The impregnated proton exchange membrane is rinsed with pure water to remove the residual alkali solution on the surface. The platinum nanoparticles are loaded on the proton exchange membrane by the immersion reduction method: the proton exchange membrane is placed in a H2PtCl6 solution with a concentration of 0.01-0.05mol / L, kept at 50-80℃ for 0.5-5h, and the membrane is taken out and the surface is rinsed with pure water, followed by a reduction reaction in a mixture of 0.05-0.2mol / LNaOH and 0.6-0.8mol / LNaBH4 solution, the reaction temperature is 50-80℃, and the reaction time is 0.5-5h. Finally, it is rinsed with pure water to obtain a Pt / Nafion composite membrane. The proton exchange membrane loaded with platinum nanoparticles prepared by the method of the present invention is applied to a pure water hydrogen production electrolyzer and has the advantages of low electrolysis voltage, stable performance, etc.
[0075] The purpose of the present invention is to provide a method for preparing proton exchange membrane-loaded platinum nanoparticles for a pure water electrolyzer.
[0076] The objective of the present invention is achieved through the following technical solutions:
[0077] A method for preparing platinum nanoparticles loaded with a proton exchange membrane for a pure water electrolyzer comprises the following steps:
[0078] Pre-treating the proton exchange membrane, and then treating the pre-treated proton exchange membrane with a NaOH solution, wherein the concentration of the NaOH solution is 0.05-0.2 mol / L, the treatment temperature is 10-40° C., and the treatment time is 0.5-5 h;
[0079] The proton exchange membrane is placed in a H2PtCl6 solution for platinum immersion treatment, wherein the concentration of the H2PtCl6 solution is 0.01-0.05 mol / L, the treatment temperature is 50-80°C, and the treatment time is 0.5-5h.
[0080] Then, the proton exchange membrane is immersed in a reducing solution for reduction reaction, wherein the reducing solution is a mixture of 0.05-0.2 mol / L NaOH and 0.6-0.8 mol / L NaBH4, the reduction reaction temperature is 50-80°C, and the reaction time is 0.5-5h; then, it can be rinsed with pure water.
[0081] The above-mentioned method for pre-treating the proton exchange membrane comprises: treating the proton exchange membrane in a hydrogen peroxide solution and a sulfuric acid solution respectively, wherein the concentration of the hydrogen peroxide solution is 3%-5%, the concentration of the sulfuric acid solution is 0.5-1 mol / L, the temperature of the two solutions for treatment is 80-100°C, and the treatment time is 0.5-2h. After treatment, the proton exchange membrane is rinsed with pure water to eliminate the acid residue on the surface.
[0082] After the proton exchange membrane is treated with NaOH solution and impregnated with platinum, the membrane surface is rinsed with pure water.
[0083] The proton exchange membrane loaded with platinum nanoparticles is obtained by adopting the above-mentioned impregnation reduction method.
[0084] A method for preparing a proton exchange membrane loaded with platinum nanoparticles for a pure water electrolyzer, preferably, the proton exchange membrane pretreatment method: treating the proton exchange membrane in a 3% hydrogen peroxide solution and a 1 mol / L sulfuric acid solution at 80°C for 1 hour respectively, and rinsing the proton exchange membrane with pure water after treatment.
[0085] Preferably, the NaOH solution treatment concentration is 0.1 mol / L, the treatment temperature is 25° C., and the treatment time is 1 h.
[0086] Preferably, the concentration of the H2PtCl6 solution treated with platinum is 0.01 mol / L, the treatment temperature is 60°C, and the treatment time is 1 hour.
[0087] Preferably, the reaction solution of the reduction reaction is a mixture of 0.1 mol / L NaOH and 0.8 mol / L NaBH4, the reaction temperature is 60°C, and the reaction time is 1 hour.
[0088] Based on the above test process:
[0089] Figure 1 The microstructure and morphology of the proton exchange membrane loaded with platinum nanoparticles obtained in Example 1 were characterized using a SU8020 field emission scanning electron microscope produced by Hitachi, Japan. It can be seen from the figure that the platinum nanoparticles are relatively evenly distributed on the proton exchange membrane substrate. This distribution greatly increases the exposed area of platinum and improves the hydrogen removal catalytic activity of the material.
[0090] Figure 2 This is the EDS energy spectrum analysis of the cross section of the proton exchange membrane loaded with platinum nanoparticles. From the analysis results, it can be seen that the presence of platinum element is successfully detected, indicating that platinum is successfully loaded on the proton exchange membrane substrate.
[0091] Figure 3 The proton exchange membrane loaded with platinum nanoparticles is applied to a pure water electrolyzer. The relationship diagram between voltage and current density at an operating temperature of 50°C shows that the chamber voltage is 1.86V when the current density is 10000A / m2.
[0092] Figure 4 The proton exchange membrane loaded with platinum nanoparticles is applied to a pure water electrolyzer. The graph shows the relationship between the hydrogen content in oxygen and the operating time under the conditions of an operating temperature of 50°C and an operating current density of 10000A / m2. It can be seen from the graph that the hydrogen content in oxygen is basically maintained between 0.2% and 0.3%.
[0093] The present invention has the following beneficial effects:
[0094] 1. The proton exchange membrane for pure water electrolyzer prepared by the present invention is loaded with platinum nanoparticles, and the platinum particles are evenly dispersed in the proton exchange membrane matrix, which is beneficial to reduce the water decomposition voltage and reduce the hydrogen content in oxygen.
[0095] 2. The present invention adopts an impregnation reduction method, the preparation process is simple, and the required equipment is simple.
[0096] 3. The proton exchange membrane prepared by the present invention is loaded with platinum nanoparticles, has low internal resistance, and can be used as a diaphragm material in the water electrolysis industry.
[0097] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.
Claims
1. A method for preparing proton exchange membrane-loaded platinum nanoparticles, characterized in that: The preparation method of the proton exchange membrane loaded with platinum nanoparticles comprises: The proton exchange membrane is immersed in a NaOH solution; After the immersion treatment, the proton exchange membrane is subjected to a platinum impregnation treatment; After the platinum impregnation treatment, the proton exchange membrane is immersed in a reducing solution for a reduction reaction to obtain a proton exchange membrane loaded with platinum nanoparticles.
2. The method for preparing proton exchange membrane-supported platinum nanoparticles according to claim 1, characterized in that: Before the step of immersing the proton exchange membrane in a NaOH solution, the method further comprises: Pretreatment to eliminate inorganic metal ions and organic impurities on the surface of proton exchange membranes.
3. The method for preparing proton exchange membrane-loaded platinum nanoparticles according to claim 2, characterized in that: The NaOH solution is a 0.05-0.2 mol / L NaOH solution, the treatment temperature is 10-40° C., and the treatment time is 0.5-5 h.
4. The method for preparing proton exchange membrane-supported platinum nanoparticles according to claim 3, characterized in that: The solution for the platinum immersion treatment is H2PtCl6 solution, with a concentration of 0.01-0.05 mol / L, a treatment temperature of 50-80°C, and a treatment time of 0.5-5h.
5. The method for preparing proton exchange membrane-loaded platinum nanoparticles according to claim 4, characterized in that: The reducing solution is a mixture of 0.05-0.2 mol / L NaOH and 0.6-0.8 mol / L NaBH4, the reduction reaction temperature is 50-80° C., and the reaction time is 0.5-5 h.
6. The method for preparing proton exchange membrane-loaded platinum nanoparticles according to claim 5, characterized in that: After the platinum impregnation treatment, the proton exchange membrane is immersed in a reducing solution for reduction reaction to obtain a proton exchange membrane loaded with platinum nanoparticles, and the method further comprises: The proton exchange membrane loaded with platinum nanoparticles is obtained by washing with pure water.
7. The method for preparing proton exchange membrane-supported platinum nanoparticles according to claim 6, characterized in that: The pre-processing further comprises: Treating the proton exchange membrane in a hydrogen peroxide solution and a sulfuric acid solution respectively, wherein the concentration of the hydrogen peroxide solution is 3%-5%, the concentration of the sulfuric acid solution is 0.5-1 mol / L, the temperature for treating the two solutions is 80-100°C, and the treatment time is 0.5-2h; After treatment, the proton exchange membrane is rinsed with pure water to eliminate acidic residues on the surface.
8. The method for preparing proton exchange membrane-supported platinum nanoparticles according to claim 7, characterized in that: The pre-processing further comprises: The proton exchange membrane was treated in a 3% hydrogen peroxide solution and a 1 mol / L sulfuric acid solution at 80° C. for 1 hour, respectively. After the treatment, the proton exchange membrane was rinsed with pure water.
9. The method for preparing proton exchange membrane-supported platinum nanoparticles according to claim 8, characterized in that: The NaOH solution treatment concentration is 0.1 mol / L, the treatment temperature is 25° C., and the treatment time is 1 h.
10. The method for preparing proton exchange membrane-loaded platinum nanoparticles according to claim 9, characterized in that: The concentration of the H2PtCl6 solution for the platinum impregnation treatment is 0.01 mol / L, the treatment temperature is 60°C, and the treatment time is 1 h; The reaction solution of the reduction reaction is a mixture of 0.1 mol / L NaOH and 0.8 mol / L NaBH4, the reaction temperature is 60°C, and the reaction time is 1 h.