Fuel cell anode catalyst and preparation method thereof, and proton exchange membrane fuel cell

A fuel cell and catalyst technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve the problems of high cost of proton exchange membrane fuel cells, poor resistance to carbon monoxide poisoning, and low activity of anode catalysts , to achieve the effect of improving the resistance to carbon monoxide poisoning, improving stability, and reducing platinum loading

Active Publication Date: 2021-09-24
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Abstract
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Problems solved by technology

[0003] Aiming at the problems of high cost of proton exchange membrane fuel cells due to excessive loading of platinum and other noble metal catalysts in current proton exchange membrane fuel cells, low activity of anode catalysts, poor resistance to carbon monoxide poisoning, and stability to be improved, the invention provides a fuel Battery anode catalyst and preparation method thereof

Method used

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  • Fuel cell anode catalyst and preparation method thereof, and proton exchange membrane fuel cell
  • Fuel cell anode catalyst and preparation method thereof, and proton exchange membrane fuel cell
  • Fuel cell anode catalyst and preparation method thereof, and proton exchange membrane fuel cell

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preparation example Construction

[0044] see figure 1 , the preparation method of the fuel cell anode catalyst comprises the following steps:

[0045]Step S01. Dissolving ammonia water in a mixed solvent of ethanol and deionized water to obtain an alkaline mixed solvent;

[0046] Step S02. adding ethyl silicate into the alkaline mixed solvent to obtain a mixed solution;

[0047] Step S03. Add dopamine hydrochloride to the mixed solution, add ammonium molybdate tetrahydrate after mixing, and evaporate to dryness at constant temperature to obtain the precursor material (the composition of the precursor material is: (NH 4 ) 2 Mo 3 o 10 @PDA @SiO 2 );

[0048] Step S04. Carry out heat treatment on the precursor material, pass through oxygen to carry out passivation treatment after natural cooling to room temperature; After passivation treatment, use hydrofluoric acid to carry out impregnation treatment, obtain molybdenum carbide@hollow carbon sphere (β-Mo 2 C@HCS);

[0049] Step S05. Impregnating and loadi...

Embodiment 1

[0072] A method for preparing a fuel cell anode catalyst, comprising the steps of:

[0073](a). Take a 500mL beaker, add 160mL of deionized water and 48mL of absolute ethanol to the beaker in turn, stir at room temperature for 15min at a speed of 600rpm, and mix well to obtain a mixed solvent.

[0074] (b). Add 2 mL of ammonia water with a mass concentration of 25% to 28% dropwise into the above mixed solvent, stir at room temperature for 30 min at a speed of 600 rpm, and mix evenly to obtain an alkaline mixed solution.

[0075] (c). Add 2 mL of ethyl silicate with a purity ≥ 98% dropwise into the above alkaline mixed solution, stir at room temperature for 30 min at a speed of 600 rpm, mix well, and then add 8 mL of prepared 100 mg / mL Add dopamine hydrochloride solution dropwise, and control the amount of dopamine hydrochloride entering the alkaline mixed solution to be (500-800) mg every (2-3) minutes; stir at room temperature at 600 rpm for 36 hours to fully react.

[0076]...

Embodiment 2

[0080] A method for preparing a fuel cell anode catalyst, comprising the steps of:

[0081] (a). Take a beaker with a capacity of 500mL, add 160mL of deionized water and 48mL of absolute ethanol to the beaker in turn, stir at room temperature for 15min at a speed of 600rpm, and mix well to obtain a mixed solvent.

[0082] (b). Add 2 mL of ammonia water with a mass concentration of 25% to 28% dropwise into the above mixed solvent, stir at room temperature for 30 min at a speed of 600 rpm, and mix evenly to obtain an alkaline mixed solution.

[0083] (c). Add 2 mL of ethyl silicate with a purity ≥ 98% dropwise into the alkaline mixed solution, stir at room temperature at 600 rpm for 30 min, mix well, and then add 8 mL of prepared hydrochloric acid with a concentration of 100 mg / mL For the dopamine solution, control the amount of dopamine hydrochloride entering the alkaline mixed solution to be (500-800) mg every (2-3) minutes; stir at room temperature for 36 hours at a speed of ...

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Abstract

The invention relates to the technical field of fuel cell catalysts, and specifically provides a fuel cell anode catalyst, a preparation method thereof, and a proton exchange membrane fuel cell. The fuel cell anode catalyst is at least one of molybdenum carbide@hollow carbon spheres, platinum & molybdenum carbide@hollow carbon spheres; wherein, molybdenum carbide@hollow carbon spheres means that the surface of the hollow carbon spheres is loaded with molybdenum carbide nanoparticles; platinum& Molybdenum carbide@hollow carbon spheres means that molybdenum carbide nanoparticles and platinum nanoparticles are loaded on the surface of hollow carbon spheres at the same time. The anode catalyst of the present invention, while reducing the load of platinum, also improves its catalytic activity, carbon monoxide poisoning resistance and catalytic stability, which is beneficial to promoting large-scale commercial application of proton exchange membrane fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a fuel cell anode catalyst, a preparation method thereof and a proton exchange membrane fuel cell. Background technique [0002] With the development of science and technology and the improvement of human living standards, people's consumption of fossil fuels is increasing day by day, which also causes huge damage to the ecological environment while consuming fossil fuels. Therefore, in order to solve the energy crisis and alleviate the pressure on the ecological environment, it is urgent to find renewable alternative energy sources. Proton exchange membrane fuel cells have many advantages such as good low-temperature performance, high energy conversion rate, simple structure, and low environmental pollution. They are recognized as the preferred chemical power source for clean energy vehicles and distributed power stations. application. At present, the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92B82Y30/00
CPCY02E60/50
Inventor 邓成龙冯其李怡娴赵志亮张震李辉王海江
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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