A platinum catalyst for fuel cell electrode and preparation method thereof

Abstract

The invention discloses a platinum catalyst for fuel cell electrodes and a preparation method thereof, relates to the field of fuel cells, and includes carrier preparation: graphite is dispersed in deionized water; ethanol and a dispersant are added for dispersion, a surfactant is added for stirring and dispersion after dispersion is completed, and n-butyl titanate is added in a dispersed state; ethanol and graphite are added and dispersed to obtain a carrier premix; the carrier premix is ​​dried to obtain a carrier; platinum loading: the carrier is dispersed in a chloroplatinic acid solution having a mass fraction of 1%-3%, a surfactant is added and then dispersed, filtered after dispersion is completed, washed with water after filtration, a pre-treated platinum catalyst is obtained, and the pre-treated platinum catalyst washed with water is dried and reduced to obtain a platinum catalyst. The present invention has high catalytic activity and can meet the fuel cell operation requirements.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and in particular to a platinum catalyst for fuel cell electrodes and a preparation method thereof. Background Art

[0002] A fuel cell is an electrochemical unit or system that directly converts chemical energy into electrical energy. The product is pollution-free and very clean and environmentally friendly. In recent years, fuel cell technology has developed rapidly, making it a more attractive energy source for power grids and automobiles. In a proton exchange membrane fuel cell, hydrogen enters the anode and contacts the catalyst to promote the separation of hydrogen into hydrogen ions (protons) and electrons. Electrons enter the cathode through the circuit, and hydrogen ions enter the cathode through the membrane / electrolyte. Oxygen enters the cathode, and with the help of the catalyst, it combines with hydrogen ions and electrons to form water, generating inevitable heat loss in the process. The main components of a proton exchange membrane fuel cell (PEMFC) are: proton exchange membrane / electrode assembly (MEA), gas diffusion layer, and bipolar plate.

[0003] Nowadays, platinum catalysts are mostly used as catalysts for fuel cells. However, due to their high price, platinum catalysts cannot be used in large quantities. However, the amount used affects the efficiency of the catalysis. At the same time, under the original conditions of use, the overall catalytic activity is not high due to the small contact space.

[0004] In summary, after extensive searching by the applicant, it is found that there is at least a problem in this field that the overall catalytic activity of platinum catalysts is not high during their application. Therefore, it is necessary to develop or improve a platinum catalyst for fuel cell electrodes and a preparation method thereof. Summary of the invention

[0005] Based on this, in order to solve the problem of low overall catalytic activity during the application of platinum catalysts, the present invention provides a platinum catalyst for fuel cell electrodes and a preparation method thereof. The specific technical scheme is as follows:

[0006] A method for preparing a platinum catalyst for a fuel cell electrode comprises the following steps:

[0007] Vector preparation:

[0008] Disperse graphite accounting for 1 / 2 of the total added amount of graphite in deionized water, then add ethanol accounting for 1 / 2 of the total added amount of ethanol and a dispersant for dispersion for 15-20 minutes, and after dispersion, add a surfactant accounting for 2 / 3 of the total added amount of surfactant for stirring and dispersion for 15-20 minutes;

[0009] Add n-butyl titanate in a dispersed state for 45-50 minutes;

[0010] Add ethanol accounting for 1 / 2 of the total amount of ethanol added and graphite accounting for 1 / 2 of the total amount of graphite added and disperse for 20 min to 25 min to obtain a carrier premix;

[0011] Drying the carrier premix to obtain a carrier;

[0012] Platinum loading:

[0013] The carrier is dispersed in a chloroplatinic acid solution with a mass fraction of 1% to 3%, and a surfactant accounting for 1 / 3 of the total amount of surfactant is added and then the dispersion is continued for 30 min to 35 min;

[0014] After dispersion is completed, the mixture is filtered and then washed with water for 3-4 minutes to obtain a pretreated platinum catalyst. The pretreated platinum catalyst after washing is dried and reduced to obtain a platinum catalyst.

[0015] Furthermore, in parts by weight, the carrier includes the following raw materials: 8-12 parts of graphite, 28-32 parts of deionized water, 48-52 parts of ethanol, 1-2 parts of dispersant, 2-4 parts of surfactant, and 4-6 parts of n-butyl titanate; in parts by weight, the platinum catalyst includes the following raw materials: 28-32 parts of carrier and 68-72 parts of chloroplatinic acid solution.

[0016] Furthermore, the carrier includes the following raw materials in parts by weight: 12 parts of graphite, 29 parts of deionized water, 52 parts of ethanol, 1 part of dispersant, 2 parts of surfactant, and 4 parts of n-butyl titanate; the platinum catalyst includes the following raw materials in parts by weight: 32 parts of carrier and 68 parts of chloroplatinic acid solution.

[0017] Furthermore, the dispersant is polyvinyl pyrrolidone.

[0018] Furthermore, the surfactant is polydiallyldimethylammonium chloride.

[0019] Furthermore, the n-butyl titanate is added dropwise, wherein the addition time is 20 min-25 min.

[0020] Furthermore, the carrier premix is ​​dried at a temperature of 50° C.-60° C., and the drying time is 30 min-35 min.

[0021] Furthermore, the pretreated platinum catalyst after washing is dried and reduced. Specifically, the pretreated platinum catalyst is added into a fluidized bed dryer for drying and reduction. The pretreated platinum catalyst is put into the fluidized bed dryer through the material inlet, and hydrogen at 100° C.-150° C. is introduced into the hot air outlet of the fluidized bed dryer. The pretreated platinum catalyst is continuously dried and reduced through the fluidized bed dryer and then discharged from the discharge port.

[0022] Furthermore, the hydrogen gas flow rate is 0.5L / s-1L / s.

[0023] The technical solution also provides a platinum catalyst for fuel cell electrodes prepared according to the above-mentioned method for preparing the platinum catalyst for fuel cell electrodes.

[0024] In the above technical scheme, firstly, graphite is dispersed in a dispersion system of ethanol and deionized water, and then a surfactant is added, and then n-butyl titanate is added, so that n-butyl titanate is attached to the surface of graphite. Since the amount of n-butyl titanate added is less than the amount of graphite added, a partially wrapped state is formed. Then, ethanol and graphite are added, and graphite is attached again in a state of being pre-wrapped by n-butyl titanate to form a multi-layer zigzag structure. After drying, a multi-layer zigzag structure of graphite-nano titanium dioxide-graphite is formed, and the layered surface roughness is relatively large, thereby increasing the specific surface area of ​​the formed carrier and providing multiple attachable surfaces for subsequent platinum loading. The carrier is dispersed in a chloroplatinic acid solution and a surfactant is added for dispersion, so that chloroplatinic acid is loaded on the carrier, and a platinum catalyst is obtained by drying and reduction treatment. This preparation method is simple and easy to implement. Platinum is loaded on a carrier with a large specific surface area, so that the platinum is distributed in multiple directions, reducing the occurrence of platinum stacking. When more platinum catalyst is used, there is less stacking and the catalytic effect is reduced. Therefore, a higher catalytic efficiency is achieved overall under the state of quantitative addition, the overall catalytic activity is improved, and costs are saved.

[0025] Subsequently, the pretreated platinum catalyst is dried and reduced by a fluidized bed dryer, and the heated hydrogen is transported as hot air to the fluidized bed dryer for simultaneous drying and reduction. This drying and reduction method is easy to implement and can be carried out continuously, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the preparation process of the present invention;

[0027] Figure 2 It is a schematic diagram of the drying and reduction process of the pretreated platinum catalyst of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] A method for preparing a platinum catalyst for a fuel cell electrode in one embodiment of the present invention comprises the following steps:

[0031] Vector preparation:

[0032] Disperse graphite accounting for 1 / 2 of the total added amount of graphite in deionized water, then add ethanol accounting for 1 / 2 of the total added amount of ethanol and a dispersant for dispersion for 15-20 minutes, and after dispersion, add a surfactant accounting for 2 / 3 of the total added amount of surfactant for stirring and dispersion for 15-20 minutes;

[0033] Add n-butyl titanate in a dispersed state for 45-50 minutes;

[0034] Add ethanol accounting for 1 / 2 of the total amount of ethanol added and graphite accounting for 1 / 2 of the total amount of graphite added and disperse for 20 min to 25 min to obtain a carrier premix;

[0035] Drying the carrier premix to obtain a carrier;

[0036] Platinum loading:

[0037] The carrier is dispersed in a chloroplatinic acid solution with a mass fraction of 1% to 3%, and a surfactant accounting for 1 / 3 of the total amount of surfactant is added and then the dispersion is continued for 30 min to 35 min;

[0038] After dispersion is completed, the mixture is filtered and then washed with water for 3-4 minutes to obtain a pretreated platinum catalyst. The pretreated platinum catalyst after washing is dried and reduced to obtain a platinum catalyst.

[0039] In one of the embodiments, the carrier includes the following raw materials, calculated by weight: 8-12 parts of graphite, 28-32 parts of deionized water, 48-52 parts of ethanol, 1-2 parts of dispersant, 2-4 parts of surfactant, and 4-6 parts of n-butyl titanate; the platinum catalyst includes the following raw materials, calculated by weight: 28-32 parts of carrier and 68-72 parts of chloroplatinic acid solution.

[0040] In one of the embodiments, the carrier includes the following raw materials, calculated by weight: 12 parts of graphite, 29 parts of deionized water, 52 parts of ethanol, 1 part of dispersant, 2 parts of surfactant, and 4 parts of n-butyl titanate; the platinum catalyst includes the following raw materials, calculated by weight: 32 parts of carrier and 68 parts of chloroplatinic acid solution.

[0041] In one embodiment, the dispersant is polyvinyl pyrrolidone.

[0042] In one embodiment, the surfactant is polydiallyldimethylammonium chloride.

[0043] In one embodiment, n-butyl titanate is added dropwise, wherein the addition time is 20 min-25 min.

[0044] In one embodiment, the carrier premix is ​​dried at a temperature of 50° C.-60° C., and the drying time is 30 min-35 min.

[0045] In one of the embodiments, the pretreated platinum catalyst after washing is dried and reduced. Specifically, the pretreated platinum catalyst is added into a fluidized bed dryer for drying and reduction. The pretreated platinum catalyst is put into the fluidized bed dryer through the material inlet, 100°C-150°C hydrogen is introduced into the hot air outlet of the fluidized bed dryer, and room temperature hydrogen is introduced into the cold air outlet of the fluidized bed dryer. The top of the fluidized bed dryer is used for air discharge and gas collection. The pretreated platinum catalyst is continuously dried and reduced through the fluidized bed dryer and then discharged at the discharge port.

[0046] In one embodiment, the hydrogen gas flow rate is 0.5 L / s-1 L / s.

[0047] The technical solution also provides a platinum catalyst for fuel cell electrodes prepared according to the above-mentioned method for preparing the platinum catalyst for fuel cell electrodes.

[0048] In the above technical scheme, firstly, graphite is dispersed in a dispersion system of ethanol and deionized water, and then a surfactant is added, and then n-butyl titanate is added, so that n-butyl titanate is attached to the surface of graphite. Since the amount of n-butyl titanate added is less than the amount of graphite added, a partially wrapped state is formed. Then, ethanol and graphite are added, and graphite is attached again in a state of being pre-wrapped by n-butyl titanate to form a multi-layer zigzag structure. After drying, a multi-layer zigzag structure of graphite-nano titanium dioxide-graphite is formed, and the layered surface roughness is relatively large, thereby increasing the specific surface area of ​​the formed carrier and providing multiple attachable surfaces for subsequent platinum loading. The carrier is dispersed in a chloroplatinic acid solution and a surfactant is added for dispersion, so that chloroplatinic acid is loaded on the carrier, and a platinum catalyst is obtained by drying and reduction treatment. This preparation method is simple and easy to implement. Platinum is loaded on a carrier with a large specific surface area, so that the platinum is distributed in multiple directions, reducing the occurrence of platinum stacking. Using more platinum catalysts also reduces stacking and affects catalysis, thereby achieving a higher overall catalytic efficiency under the state of quantitative addition, improving the overall catalytic activity and saving costs.

[0049] The final platinum catalyst is obtained by graphite dispersion, primary wrapping, secondary wrapping, pretreatment of the platinum catalyst and drying and reduction. The preparation process is simple and easy to implement, and the platinum catalyst is loaded on multiple loading surfaces, thereby improving the overall catalytic activity of the platinum catalyst.

[0050] Subsequently, the pretreated platinum catalyst is dried and reduced by a fluidized bed dryer, and the heated hydrogen is transported as hot air to the fluidized bed dryer for simultaneous drying and reduction. This drying and reduction method is easy to implement and can be carried out continuously, thereby improving production efficiency.

[0051] The embodiments of the present invention will be described in detail below with reference to specific examples.

[0052] The difference between Example 1-4 and Comparative Example 1-5 is that the amount of raw material added in the preparation of the platinum catalyst is different, the preparation process is the same, and the amount of raw material added is calculated by weight, as shown in Table 1.

[0053] Table 1

[0054]

[0055] The dispersant is polyvinyl pyrrolidone. The surfactant is polydiallyl dimethyl ammonium chloride.

[0056] A method for preparing a platinum catalyst for a fuel cell electrode comprises the following steps:

[0057] Vector preparation:

[0058] Disperse graphite accounting for 1 / 2 of the total added amount of graphite in deionized water, then add ethanol accounting for 1 / 2 of the total added amount of ethanol and a dispersant for dispersion for 20 minutes, and after dispersion, add a surfactant accounting for 2 / 3 of the total added amount of surfactant for stirring and dispersion for 20 minutes;

[0059] n-butyl titanate is added in a dispersed state, and the dispersion time is 45 minutes; n-butyl titanate is added dropwise, and the dropwise addition time is 25 minutes;

[0060] Add ethanol accounting for 1 / 2 of the total amount of ethanol added and graphite accounting for 1 / 2 of the total amount of graphite added and disperse for 25 minutes to obtain a carrier premix;

[0061] The carrier premix is ​​dried at a drying temperature of 60° C. and a drying time of 30 min to obtain a carrier;

[0062] Platinum loading:

[0063] The carrier was dispersed in a 1% by mass chloroplatinic acid solution, and a surfactant accounting for 1 / 3 of the total amount of surfactant was added and then continued to disperse for 30 minutes;

[0064] After dispersion is completed, filtration is performed, and then washing is performed for 4 minutes to obtain a pretreated platinum catalyst. The pretreated platinum catalyst after washing is dried and reduced to obtain a platinum catalyst.

[0065] The pre-treated platinum catalyst after washing is dried and reduced, specifically, the pre-treated platinum catalyst is added to a fluidized bed dryer for drying and reduction, the pre-treated platinum catalyst is put into the fluidized bed dryer through the material inlet, 100°C-150°C hydrogen is introduced into the hot air outlet of the fluidized bed dryer, the pre-treated platinum catalyst is continuously dried and reduced through the fluidized bed dryer, and then discharged from the discharge port. The hydrogen introduction flow rate is 0.5L / s-1L / s.

[0066] Comparative Example 6

[0067] A method for preparing a platinum catalyst for a fuel cell electrode comprises the following steps:

[0068] Vector preparation:

[0069] Disperse the graphite in deionized water; add ethanol and dispersant to disperse for 20 minutes, add surfactant accounting for 2 / 3 of the total amount of surfactant added, stir and disperse for 20 minutes;

[0070] n-Butyl titanate was added in a dispersed state for 45 minutes. n-Butyl titanate was added dropwise for 25 minutes.

[0071] obtaining a carrier premix;

[0072] The carrier premix is ​​dried at a drying temperature of 60° C. and a drying time of 30 min to obtain a carrier;

[0073] Platinum loading:

[0074] The carrier was dispersed in a 1% by mass chloroplatinic acid solution, and a surfactant accounting for 1 / 3 of the total amount of surfactant was added and then continued to disperse for 30 minutes;

[0075] After dispersion is completed, filtration is performed, and then washing is performed for 4 minutes to obtain a pretreated platinum catalyst. The pretreated platinum catalyst after washing is dried and reduced to obtain a platinum catalyst.

[0076] The pre-treated platinum catalyst after washing is dried and reduced, specifically, the pre-treated platinum catalyst is added to a fluidized bed dryer for drying and reduction, the pre-treated platinum catalyst is put into the fluidized bed dryer through the material inlet, 100°C-150°C hydrogen is introduced into the hot air outlet of the fluidized bed dryer, the pre-treated platinum catalyst is continuously dried and reduced through the fluidized bed dryer, and then discharged from the discharge port. The hydrogen introduction flow rate is 0.5L / s-1L / s.

[0077] Relevant performance tests were carried out on Examples 1-4 and Comparative Examples 1-6, and the results are shown in Table 2, wherein the catalytic activity is measured by the conversion rate of fuel oxygen, which is the conversion rate calculated by feeding the same amount of raw material under the same amount of platinum catalyst.

[0078] Table 2:

[0079]

[0080]

[0081] It can be seen from the data in Table 2 that the platinum catalysts prepared in Examples 1-4 have good catalytic activity and can meet the fuel cell operation requirements; specifically, the difference between Comparative Example 1 and Example 4 is that n-butyl titanate is not added during the preparation of the carrier in the comparative example, and the catalytic activity of the platinum catalyst prepared in Comparative Example 1 is lower than that of the platinum catalyst prepared in Example 4. It can be seen that the addition of n-butyl titanate in the preparation process can effectively improve the catalytic activity of the platinum catalyst. By adding n-butyl titanate, n-butyl titanate is attached to the surface of graphite. Since the amount of n-butyl titanate added is less than that of graphite, a partially wrapped state, then ethanol and graphite are added, and graphite is attached again in the state of being pre-wrapped by n-butyl titanate to form a multi-layer zigzag structure. After drying, a multi-layer zigzag structure of graphite-nano titanium dioxide-graphite is formed, and the layered surface roughness is relatively large, which increases the specific surface area of ​​the formed carrier and provides multiple attachment surfaces for subsequent platinum loading; platinum is loaded on a carrier with a large specific surface area, so that platinum is distributed in multiple directions, the occurrence of platinum stacking is reduced, and the use of more platinum catalysts results in less stacking and affects catalysis, thereby achieving a higher catalytic efficiency as a whole under the state of quantitative addition and saving costs.

[0082] The difference between Comparative Example 2 and Example 4 is that the amount of n-butyl titanate added in Comparative Example 2 is larger than that in Example 4. From the data in Table 2, it can be seen that the catalytic activity of the platinum catalyst prepared in Comparative Example 2 is not as good as that of the platinum catalyst prepared in Example 4. Therefore, it can be concluded that the amount of n-butyl titanate added has an effect on the catalytic activity of the prepared platinum catalyst.

[0083] The difference between Comparative Example 3 and Example 4 is that the amount of n-butyl titanate added in Comparative Example 3 is smaller than that in Example 4. It can be seen from the data in Table 2 that the catalytic activity of the platinum catalyst prepared in Comparative Example 3 is not as good as that of the platinum catalyst prepared in Example 4. Combined with Comparative Example 2, it can be seen that, in terms of percentage by weight, when the amount of n-butyl titanate added is 4-6 parts of the total amount of carrier raw materials added, the catalytic activity of the prepared platinum catalyst can achieve the best effect;

[0084] The difference between Comparative Example 4 and Example 4 is that the amount of carrier added in the raw material for preparing the platinum catalyst in Comparative Example 4 is less. From the data in Table 2, it can be seen that the catalytic activity of the platinum catalyst prepared in Comparative Example 4 is not as good as the catalytic activity of the platinum catalyst prepared in Example 4. It can be seen that the amount of carrier added has an effect on the prepared platinum catalyst;

[0085] The difference between Comparative Example 5 and Example 4 is that in Comparative Example 5, a larger amount of carrier is added to the raw material for preparing the platinum catalyst. From the data in Table 2, it can be seen that the catalytic activity of the platinum catalyst prepared in Comparative Example 5 is not as good as that of the platinum catalyst prepared in Example 4. Combined with Comparative Example 4, it can be seen that, in terms of percentage by weight, when the amount of carrier added is 28-32 parts of the total raw material added in the platinum loading process, the catalytic activity of the prepared platinum catalyst can achieve the best effect;

[0086] The difference between Comparative Example 6 and Example 4 is that in Comparative Example 6, graphite and ethanol are added at one time. This addition method makes titanium dioxide adhere to the graphite surface, and it is impossible to form the multi-layer folded line structure of the platinum catalyst prepared in Example 4. It can be seen from the data in Table 2 that the catalytic activity of the platinum catalyst prepared in Comparative Example 6 is not as good as the catalytic activity of the platinum catalyst prepared in Example 4, but compared with Comparative Example 1, Comparative Example 6 has a higher catalytic activity, indicating that the addition of n-butyl titanate has a positive effect on the catalytic activity of the platinum catalyst; but compared with Example 4 and Comparative Examples 2-5, the catalytic activity of the platinum catalyst prepared in Comparative Example 6 is not as good as that of the platinum catalyst prepared in Example 4. The catalytic activity of the prepared platinum catalyst is low. It can be seen that after drying in Example 4, a multilayer zigzag structure of graphite-nano-titanium dioxide-graphite is formed, and the layered surface roughness is relatively large, which increases the specific surface area of ​​the formed carrier and provides multiple attachment surfaces for subsequent platinum loading; platinum is loaded on a carrier with a large specific surface area, so that platinum is distributed in multiple directions, reducing the occurrence of platinum stacking. When more platinum catalyst is used, there is less stacking and affecting catalysis, thereby achieving a higher catalytic efficiency as a whole under the state of quantitative addition, improving the overall catalytic activity and saving costs.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for preparing a platinum catalyst for a fuel cell electrode, characterized in that: It includes the following steps: Vector preparation: Disperse graphite accounting for 1 / 2 of the total added amount of graphite in deionized water, then add ethanol accounting for 1 / 2 of the total added amount of ethanol and a dispersant for dispersion for 15-20 minutes, and after dispersion, add a surfactant accounting for 2 / 3 of the total added amount of surfactant for stirring and dispersion for 15-20 minutes; Add n-butyl titanate in a dispersed state for 45-50 minutes; Add ethanol accounting for 1 / 2 of the total amount of ethanol added and graphite accounting for 1 / 2 of the total amount of graphite added and disperse for 20 min to 25 min to obtain a carrier premix; Drying the carrier premix to obtain a carrier; Platinum loading: The carrier is dispersed in a chloroplatinic acid solution with a mass fraction of 1% to 3%, and a surfactant accounting for 1 / 3 of the total amount of surfactant is added and then the dispersion is continued for 30 min to 35 min; After dispersion is completed, the mixture is filtered and then washed with water for 3-4 minutes to obtain a pretreated platinum catalyst. The pretreated platinum catalyst after washing is dried and reduced to obtain a platinum catalyst.

2. The method for preparing a platinum catalyst for fuel cell electrodes according to claim 1, characterized in that: In parts by weight, the carrier includes the following raw materials: 8-12 parts of graphite, 28-32 parts of deionized water, 48-52 parts of ethanol, 1-2 parts of dispersant, 2-4 parts of surfactant, and 4-6 parts of n-butyl titanate; in parts by weight, the platinum catalyst includes the following raw materials: 28-32 parts of carrier and 68-72 parts of chloroplatinic acid solution.

3. The method for preparing a platinum catalyst for fuel cell electrodes according to claim 2, characterized in that: In terms of weight, the carrier includes the following raw materials: 12 parts of graphite, 29 parts of deionized water, 52 parts of ethanol, 1 part of dispersant, 2 parts of surfactant, and 4 parts of n-butyl titanate; in terms of weight, the platinum catalyst includes the following raw materials: 32 parts of carrier and 68 parts of chloroplatinic acid solution.

4. The method for preparing a platinum catalyst for fuel cell electrodes according to claim 1, characterized in that: The dispersant is polyvinyl pyrrolidone.

5. The method for preparing a platinum catalyst for fuel cell electrodes according to any one of claim 1, characterized in that: The surfactant is polydiallyldimethylammonium chloride.

6. The method for preparing a platinum catalyst for fuel cell electrodes according to claim 1, characterized in that: The method of adding n-butyl titanate is dropwise addition, wherein the dropwise addition time is 20 min-25 min.

7. The method for preparing a platinum catalyst for fuel cell electrodes according to claim 1, characterized in that: The carrier premix is ​​dried at a temperature of 50° C. to 60° C. and for a drying time of 30 min to 35 min.

8. The method for preparing a platinum catalyst for fuel cell electrodes according to claim 1, characterized in that: The pretreated platinum catalyst after washing is dried and reduced. Specifically, the pretreated platinum catalyst is added into a fluidized bed dryer for drying and reduction. The pretreated platinum catalyst is put into the fluidized bed dryer through the material inlet, and hydrogen at 100°C-150°C is introduced into the hot air outlet of the fluidized bed dryer. The pretreated platinum catalyst is continuously dried and reduced through the fluidized bed dryer and then discharged from the discharge port.

9. The method for preparing a platinum catalyst for fuel cell electrodes according to claim 8, characterized in that: The hydrogen inlet flow rate is 0.5L / s-1L / s.

10. A platinum catalyst for fuel cell electrodes prepared by the method for preparing a platinum catalyst for fuel cell electrodes according to any one of claims 1 to 9.

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