CN113540481A - Platinum-cobalt alloy carbon catalyst for proton exchange membrane fuel cell and preparation method thereof - Google Patents

Platinum-cobalt alloy carbon catalyst for proton exchange membrane fuel cell and preparation method thereof Download PDF

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CN113540481A
CN113540481A CN202110806266.5A CN202110806266A CN113540481A CN 113540481 A CN113540481 A CN 113540481A CN 202110806266 A CN202110806266 A CN 202110806266A CN 113540481 A CN113540481 A CN 113540481A
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platinum
cobalt alloy
carbon catalyst
catalyst
cobalt
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CN113540481B (en
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华秋茹
张义煌
张明
陈杰
李刚
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Wuxi Weifu High Technology Group Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H01M4/921—Alloys or mixtures with metallic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
    • H01M4/8882—Heat treatment, e.g. drying, baking
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
    • H01M4/926—Metals of platinum group supported on carriers, e.g. powder carriers on carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell and a preparation method thereof. The preparation of the platinum-cobalt alloy carbon catalyst comprises a pretreatment process and a reaction process, wherein the obtained crude platinum-cobalt alloy catalyst is subjected to post-treatment, a post-treatment solution A is added into the crude platinum-cobalt alloy catalyst during the post-treatment, after the treatment is carried out for 0.5-200h at the temperature of 0-80 ℃, part of the solvent is removed, a post-treatment solution B is added, the treatment is continued for 0.5-200h at the temperature of 0-80 ℃, and then the washing and the drying at the temperature of 20-85 ℃ are carried out to obtain the platinum-cobalt alloy carbon catalyst. The prepared crude platinum cobalt alloy catalyst can remove unalloyed elements and impurities on the surface of the catalyst through aftertreatment, and raw materials used in the preparation process are environment-friendly, the preparation process is strong in operability, and commercialization is easy to realize; the prepared platinum-cobalt alloy catalyst has excellent catalytic activity, good oxygen reduction performance and high power density when applied to a single cell.

Description

Platinum-cobalt alloy carbon catalyst for proton exchange membrane fuel cell and preparation method thereof
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell and a preparation method thereof.
Background
At present, hydrogen energy is one of the most ideal energy sources in the 21 st century, and the efficient utilization of hydrogen energy is a hot spot of research of scientists. Proton Exchange Membrane Fuel Cells (PEMFCs) can directly convert the chemical energy of hydrogen into electric energy, have high energy conversion efficiency, and can more effectively utilize hydrogen energy. The catalyst, as the "heart" of the fuel cell, is decisive for the performance of the fuel cell, and the development of a high-performance, low-cost, long-life catalyst is a prerequisite for commercialization of PEMFCs.
PEMFCs catalysts are still the most widely used at present as platinum and platinum-based alloy carbon catalysts, where PtCo-C has a exchange current density of 6X 10-9A/cm2And the exchange current value is 2 times of that of the Pt-C catalyst, and the kinetic angle performance is better. Therefore, the preparation of the PtCo-C catalyst is very significant, and most of the reports of the current alloy catalysts focus on improving the oxygen reduction performance of the catalyst, so that the PtCo-C catalyst can be practically applied to a single fuel cell, and the power density of the fuel cell is not much reported. For example, chinese patent CN111659419A discloses a preparation method of a platinum-based alloy catalyst, which is excellent in oxygen reduction performance, but the catalyst is not actually made into a fuel cell and tested for fuel cell performance, and the application of the catalyst in a fuel cell cannot be fully demonstrated.
Disclosure of Invention
The invention aims to provide a preparation and post-treatment method of a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell. The preparation method of the invention can not only improve the oxygen reduction performance of the catalyst, but also improve the power density of the single cell, and can effectively reduce the noble metal loading capacity of the fuel cell, the preparation and post-treatment methods have strong operability and good commercialization prospect, and the prepared catalyst has good performance when being applied to the single cell of the fuel cell.
In order to achieve the technical purpose, the embodiment of the invention adopts the technical scheme that:
in a first aspect, an embodiment of the present invention provides a method for preparing a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell, including the following steps:
(1) mixing a platinum-carbon material, water and a cobalt source solution, and shearing and dispersing for 0.1-24h to form a uniform suspension; adding a proper amount of additive at the temperature of 0-80 ℃ to adjust the pH value of the suspension to 9-12, stirring for 0.1-100 h, filter-pressing and washing, and drying at the temperature of 20-85 ℃ for 0.5-72h to obtain a precursor, wherein the mass ratio of water to the platinum-carbon material is 1-20: 1, the molar ratio of cobalt in the cobalt source solution to platinum in the platinum-carbon material is 0.01-10;
(2) carrying out high-temperature roasting on the precursor with the water content of 5-70% obtained in the step (1) at the temperature of 200-850 ℃ in a protective atmosphere for 0.5-20 h, and carrying out quenching annealing at the temperature of 100-400 ℃ to obtain a crude platinum-cobalt alloy catalyst;
(3) and (3) post-treatment of the catalyst: adding 0.1-40L of post-treatment solution A with the concentration of 0.01-10mol/L into the crude platinum cobalt alloy catalyst obtained in the step (2), treating at 0-80 ℃ for 0.5-200h, removing part of solvent, adding 0.1-40L of post-treatment solution B with the concentration of 0.01-10mol/L, continuously treating at 0-80 ℃ for 0.5-200h, washing, and drying at 20-85 ℃ to obtain the platinum cobalt alloy carbon catalyst.
Further, the platinum-carbon material is a platinum-carbon catalyst with the platinum mass content of 20-50%, and the electrochemical active area of the platinum-carbon catalyst is 75-120m2The particle diameter of the platinum particles is 2-5 nm.
Further, the concentration of the cobalt source solution is 0.01-12 mol/L, and the solute is selected from one or more of cobalt nitrate, cobalt acetate, cobalt chloride and cobalt sulfate.
Further, the additive is one or a mixture of several of sodium hypophosphite, sodium formate, sodium sulfite, sodium hydroxide, ammonia water and sodium carbonate, and the molar ratio of the additive to the total amount of the platinum and cobalt elements is 0.1-120: 1.
Further, the protective atmosphere in the high-temperature roasting process in the step (2) is a mixed gas of one or more of nitrogen, argon and hydrogen, and the roasting temperature is 450-850 ℃.
Further, the annealing speed of the quenching annealing in the step (2) is 4-30 ℃/min.
Further, in the step (3), the post-treatment solution A and/or B is an aqueous solution of ethylene glycol, ethanol, triethanolamine, n-butanol, tartaric acid, ascorbic acid, citric acid, sodium hydroxide, hydrochloric acid, sulfuric acid, nitric acid, acetic acid, perchloric acid, ammonia water, hydrogen peroxide, acetone or a mixed solution of the above substances, and the concentration of the mixed solution is 0.02 to 10 mol/L.
Further, the post-treatment temperature in the step (3) is 35-70 ℃, and the post-treatment time is 0.5-120 h.
In a second aspect, the embodiment of the invention provides a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell, which is prepared by adopting the preparation method.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
1. the preparation and post-treatment method of the platinum-cobalt alloy carbon catalyst for the fuel cell has the advantages of environment-friendly used raw materials, strong operability of the preparation process and easy realization of commercialization.
2. The invention prepares the fuel cell alloy catalyst by alloying the platinum element and the cobalt element through the high-temperature preparation process, improves the alloying degree, reduces the cost of the catalyst, improves the performance of the fuel cell and reduces the carrying capacity of noble metals applied to single cells of the fuel cell.
3. After the coarse platinum-cobalt alloy catalyst is prepared, the unalloyed elements and impurities on the surface of the catalyst are removed through a special post-treatment method, and the performance of the catalyst and a single cell manufactured by using the catalyst are effectively improved.
4. The platinum-cobalt alloy catalyst prepared by the preparation method disclosed by the invention is excellent in catalytic activity, good in oxygen reduction performance and high in power density when applied to a single cell.
Drawings
Fig. 1 is a transmission electron microscope image of a platinum-cobalt alloy carbon catalyst prepared in example 1 of the present invention.
FIG. 2 shows an embodiment 1 of the present invention, aGraph of oxygen reduction performance of the catalyst prepared in ratio 1. Electrolyte was oxygen saturated 0.1M HClO when tested4(ii) a Rotating speed: 1600 rpm; sweeping speed: 10 mVs-1。
Fig. 3 is a comparative graph of polarization curves of platinum-cobalt alloy carbon catalysts prepared in examples 2 to 3 of the present invention and comparative example 2, which were tested in a single cell. The area of the single cell is 20cm2The anode and cathode stoichiometric ratio is 1.5:2.5, the anode dew point is set to 35 ℃, the cathode dew point is set to 70 ℃, the anode pile entering pressure is 1.1bar, the cathode pile entering pressure is 1.0bar, and the cell test temperature is 75 ℃.
FIG. 4 is a graph comparing power density curves for platinum cobalt alloy carbon catalysts prepared in examples 5-6 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A preparation method of a platinum-cobalt alloy carbon catalyst of a proton exchange membrane fuel cell comprises the following steps:
(1) pretreatment: weighing 1g of platinum-carbon material (self-made platinum-carbon catalyst with platinum content of 50% is prepared by dispersing 0.5g of carbon carrier and 0.5g of platinum-containing compound in ethylene glycol, uniformly dispersing to obtain suspension, stirring, adding precipitator with molar mass ratio of 4 to platinum and additive with molar mass ratio of 1 to platinum, heating to boil in a microwave oven, cooling to room temperature, standing, press-filtering, washing, drying at 50 ℃, obtaining the platinum-carbon catalyst, wherein the specific carbon carrier, the platinum-containing compound, the precipitator, the additive and the like are disclosed in Chinese patent with publication number CN111584884A, measuring 80mL of water and 1mL of cobalt nitrate solution with concentration of 1mol/L, and shearing and dispersing for 5min to form uniform suspension; adding 1g of sodium hypophosphite and a proper amount of sodium hydroxide solution at the temperature of 20 ℃ to adjust the pH value of the suspension to be 11, stirring for 1h, performing filter pressing washing, and drying at the temperature of 80 ℃ for 6h to obtain a precursor;
(2) the reaction process is as follows: roasting the precursor with the water content of 20% obtained in the step (1) at a high temperature of 700 ℃ for 15h in a hydrogen-nitrogen mixed gas (5% hydrogen), cooling to 350 ℃, and then performing quenching annealing at an annealing speed of 10 ℃/min to obtain a crude platinum-cobalt alloy carbon catalyst;
(3) and (3) post-treatment process: weighing 1g of the crude platinum-cobalt alloy carbon catalyst obtained in the step (2), adding 100mL of 1mol/L sodium hydroxide solution, 20mL of 0.5mol/L ascorbic acid and 5mL of acetone, stirring at 20 ℃ for 6h, removing 80mL of solvent, adding 100mL of 0.5mol/L sulfuric acid solution, stirring at 20 ℃ for 120h, fully washing to remove impurity ions, and drying at 70 ℃ to obtain the platinum-cobalt alloy carbon catalyst;
(4) manufacturing a single cell: accurately weighing 100mg of the platinum-cobalt alloy carbon catalyst prepared in the step (3); measuring 10mL of pure water, 10mL of isopropanol and 1mL of perfluorinated sulfonic acid resin solution, adding the pure water, the isopropanol and the perfluorinated sulfonic acid resin solution into a catalyst, crushing cells for 40min to form catalyst ink, and uniformly coating the catalyst ink on a cut proton exchange membrane to be marked as a cathode; weighing a platinum-carbon catalyst by the same method, coating the platinum-carbon catalyst on the other side of the proton exchange membrane, marking as an anode, and forming a membrane electrode CCM; adopt SGL 28BC model GDL, unpack baltcFuelcells QCF25 fast assembly test fixture apart, put into thickness limiting piece, first piece GDL, CCM, second piece GDL in proper order, fixed good back rotation pneumatic button, the clamping finishes, after connecting the gas pipeline, carries out the gas tightness and detects qualified back, carries out the monocell test.
(5) Single cell test conditions: the area of the single cell is 20cm2The anode and cathode stoichiometric ratio is 1.5:2.5, the anode dew point is set to 35 ℃, the cathode dew point is set to 70 ℃, the anode pile entering pressure is 1.1bar, the cathode pile entering pressure is 1.0bar, and the cell test temperature is 75 ℃.
Example 2
The difference between the preparation method of the platinum-cobalt alloy carbon catalyst for the proton exchange membrane fuel cell and the embodiment 1 is that 5g of platinum-carbon material (the preparation method of the self-made platinum-carbon catalyst with the platinum content of 40 percent is the same as the embodiment 1) is weighed, and other conditions are the same as those in the embodiment 1; the production and test conditions of a single cell using the platinum-cobalt alloy carbon catalyst prepared in this example were the same as those of example 1.
Example 3
A preparation method of a platinum-cobalt alloy carbon catalyst of a proton exchange membrane fuel cell is different from that of example 1 in that 5g of platinum carbon material (commercial platinum carbon catalyst of 40% Zhuangxinwan corporation) is weighed, and other conditions are consistent with the proportion in example 2; the manufacturing and test conditions of a single cell using the platinum-cobalt alloy carbon catalyst prepared in this example were the same as those of example 2.
Example 4
A preparation method of a platinum-cobalt alloy carbon catalyst of a proton exchange membrane fuel cell is different from that of example 1 in that 3000g of platinum carbon material (a self-made platinum carbon catalyst with 50 percent of platinum content is prepared by the same method as example 1) is weighed, and other conditions are the same as example 1; the production and test conditions of a single cell using the platinum-cobalt alloy carbon catalyst prepared in this example were the same as those of example 1.
Example 5
A preparation method of a platinum-cobalt alloy carbon catalyst of a proton exchange membrane fuel cell is different from the embodiment 1 in that 50g of a platinum-carbon material (a self-made platinum-carbon catalyst with 50% platinum content is prepared by the same method as the embodiment 1) is weighed, 1000mL of water and 100mL of cobalt nitrate solution with the concentration of 0.5mol/L are weighed, and the mixture is sheared and dispersed for 30min to form uniform suspension; adding 10g of sodium hydroxide, 12g of sodium formate and sodium carbonate at 25 ℃ to adjust the pH value to 10.5, stirring for 2 hours, performing filter pressing washing, and drying at 80 ℃ to obtain a precursor.
(2) Roasting the precursor with the water content of 70% obtained in the step (1) at the high temperature of 800 ℃ for 8h under the argon atmosphere, cooling to 250 ℃, and then carrying out quenching annealing at the annealing speed of 6 ℃/min to obtain a crude platinum-cobalt alloy carbon catalyst;
(3) weighing 50g of the crude platinum-cobalt alloy carbon catalyst obtained in the step (2), adding 3000mL of hydrochloric acid solution with the concentration of 1mol/L, treating at 35 ℃ for 3h, then adding 1000mL of mixed solution of n-butanol with the concentration of 1mol/L and 100mL of ammonia water with the concentration of 0.5mol/L, treating at 60 ℃ for 100h, fully washing to remove impurity ions, and drying at 80 ℃ to obtain the platinum-cobalt alloy carbon catalyst.
(4) The production and test conditions of the single cell to which the platinum-cobalt alloy carbon catalyst prepared in this example was applied were the same as those of example 1.
Example 6
A preparation method of a platinum-cobalt alloy carbon catalyst of a proton exchange membrane fuel cell is different from the embodiment 5 in that the roasting process in the step (2) is cooling to 250 ℃, and then quenching annealing is carried out at the annealing speed of 30 ℃/min, and other proportions and conditions are the same as the embodiment 5.
Comparative example 1
A method for preparing a platinum-cobalt alloy carbon catalyst, which is different from the method of example 1 in that the post-treatment process comprises the following steps: weighing 1g of the crude platinum-cobalt alloy carbon catalyst obtained in the step (2), adding 100mL of a sulfuric acid solution with the concentration of 0.5mol/L, stirring at 20 ℃ for 120h, removing 80mL of a solvent, adding 100mL of a sodium hydroxide solution with the concentration of 1mol/L, 20mL of ascorbic acid with the concentration of 0.5mol/L and 5mL of acetone, stirring at 20 ℃ for 6h, fully washing to remove impurity ions, and drying at 70 ℃ to obtain the platinum-cobalt alloy carbon catalyst, wherein other conditions are not changed.
Comparative example 2
A method for preparing a platinum-cobalt alloy carbon catalyst, which is different from the method in example 2 in that the post-treatment process of the step (3) is not carried out, and other conditions are not changed.
FIG. 1 is a transmission electron micrograph of a platinum-cobalt alloy carbon catalyst prepared according to example 1 of the present invention; as can be seen from FIG. 1, the platinum-cobalt alloy carbon catalyst prepared by the invention has consistent alloy particle size and uniform particle distribution.
FIG. 2 is a graph showing oxygen reduction performance of catalysts prepared in example 1 of the present invention and comparative example 1, in which HClO having an electrolyte saturated with oxygen and having a concentration of 0.1mol/L was measured4(ii) a Rotating speed: 1600 rpm; sweeping speed: 10 mVs-1(ii) a From fig. 2, it can be seen that the LSV curves of example 1 and comparative example 1, the absolute value of the current density at 0.9V of the catalyst prepared in example 1 is higher than that of the catalyst prepared in comparative example 1, indicating that the post-treatment process has an important influence on the oxygen reduction performance of the platinum-cobalt alloy carbon catalyst.
FIG. 3 is a comparative plot of polarization curves of platinum-cobalt alloy carbon catalysts prepared in examples 2 and 3 of the present invention and comparative example 2 in a single cell testWherein the area of the single battery is as follows: 20cm2(ii) a Anode stack pressure: 1.1 bar; cathode stacking pressure: 1.0 bar; and (3) testing temperature: 75 ℃; the anode dew point was 35 ℃ and the cathode dew point was 70 ℃. It can be seen from fig. 3 that the current density at the same voltage of the platinum-cobalt alloy carbon catalyst prepared in example 2 was higher than that of comparative example 2, indicating that the catalyst treated by the post-treatment method according to the present invention performed better.
FIG. 4 is a graph comparing the power density curves of Pt-Co alloy carbon catalysts prepared in examples 5 and 6 of the present invention; as can be seen from FIG. 4, the power density of the single fuel cell test made of the Pt-Co alloy carbon catalyst prepared by the invention can reach 1.2W/cm2Above, 1W/cm higher than the current domestic main current power density2The level of (c).
Therefore, the platinum-cobalt alloy carbon catalyst prepared by the preparation and post-treatment method has good oxygen reduction performance and high catalytic activity, and a single cell manufactured by using the catalyst has higher current density under a certain voltage, so that the power density is higher.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (9)

1. A preparation method of a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell is characterized by comprising the following steps:
(1) mixing a platinum-carbon material, water and a cobalt source solution, and shearing and dispersing for 0.1-24h to form a uniform suspension; adding a proper amount of additive at the temperature of 0-80 ℃ to adjust the pH value of the suspension to 9-12, stirring for 0.1-100 h, filter-pressing and washing, and drying at the temperature of 20-85 ℃ for 0.5-72h to obtain a precursor, wherein the mass ratio of water to the platinum-carbon material is 1-20: 1, the molar ratio of cobalt in the cobalt source solution to platinum in the platinum-carbon material is 0.01-10;
(2) carrying out high-temperature roasting on the precursor with the water content of 5-70% obtained in the step (1) at the temperature of 200-850 ℃ in a protective atmosphere for 0.5-20 h, and carrying out quenching annealing at the temperature of 100-400 ℃ to obtain a crude platinum-cobalt alloy catalyst;
(3) and (3) post-treatment of the catalyst: adding 0.1-40L of post-treatment solution A with the concentration of 0.01-10mol/L into the crude platinum cobalt alloy catalyst obtained in the step (2), treating at 0-80 ℃ for 0.5-200h, removing part of solvent, adding 0.1-40L of post-treatment solution B with the concentration of 0.01-10mol/L, continuously treating at 0-80 ℃ for 0.5-200h, washing, and drying at 20-85 ℃ to obtain the platinum cobalt alloy carbon catalyst.
2. The preparation method of the platinum-cobalt alloy carbon catalyst of the proton exchange membrane fuel cell according to claim 1, wherein the platinum-carbon material is a platinum-carbon catalyst with platinum mass content of 20-50%, and the electrochemical active area of the platinum-carbon catalyst is 75-120m2The particle diameter of the platinum particles is 2-5 nm.
3. The preparation method of the platinum-cobalt alloy carbon catalyst for the proton exchange membrane fuel cell according to claim 1, wherein the concentration of the cobalt source solution is 0.01-12 mol/L, and the solute is selected from one or more of cobalt nitrate, cobalt acetate, cobalt chloride and cobalt sulfate.
4. The preparation method of the platinum-cobalt alloy carbon catalyst for the proton exchange membrane fuel cell according to claim 1, wherein the additive is one or a mixture of several of sodium hypophosphite, sodium formate, sodium sulfite, sodium hydroxide, ammonia water and sodium carbonate, and the molar ratio of the additive to the total amount of platinum and cobalt elements is 0.1-120: 1.
5. The preparation method of the platinum-cobalt alloy carbon catalyst for the proton exchange membrane fuel cell as recited in claim 1, wherein the protective atmosphere in the high-temperature calcination process in the step (2) is a mixture of one or more of nitrogen, argon and hydrogen, and the calcination temperature is 450 ℃ to 850 ℃.
6. The method for preparing a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell according to claim 1, wherein the annealing rate of the quenching annealing in the step (2) is 4-30 ℃/min.
7. The method for preparing a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell according to claim 1, wherein in the step (3), the post-treatment solution A and/or B is an aqueous solution of ethylene glycol, ethanol, triethanolamine, n-butanol, tartaric acid, ascorbic acid, citric acid, sodium hydroxide, hydrochloric acid, sulfuric acid, nitric acid, acetic acid, perchloric acid, ammonia water, hydrogen peroxide, acetone, or a mixed solution thereof, and the concentration of the mixed solution is 0.02 to 10 mol/L.
8. The preparation method of the platinum-cobalt alloy carbon catalyst for the proton exchange membrane fuel cell according to claim 1, wherein the post-treatment temperature in the step (3) is 35-70 ℃, and the post-treatment time is 0.5-120 h.
9. A platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell, which is characterized by being prepared by the preparation method of any one of claims 1 to 8.
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Cited By (3)

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CN114243035A (en) * 2021-12-17 2022-03-25 厦门大学 Preparation method of Pt/C and PtM/C catalyst with high metal content
CN114937784A (en) * 2022-06-28 2022-08-23 湖南清牛新材料科技有限公司 Carbon-carried platinum-cobalt alloy catalyst for proton exchange membrane fuel cell and preparation method thereof
CN116314872A (en) * 2023-05-11 2023-06-23 苏州擎动动力科技有限公司 Platinum-cobalt alloy catalyst and preparation method thereof

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