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Electrochemical surface treatment method of electrode catalyst for fuel cell

An electrode catalyst and surface treatment technology, applied in the direction of optics, electrolytic components, electrolytic process, etc., to achieve the effect of increasing the processing capacity, uniform effect, and avoiding degradation

Active Publication Date: 2022-03-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is currently no effective means for electrochemically treating the surface of macro-powder catalytic materials for fuel cells outside the electrodes or devices.

Method used

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  • Electrochemical surface treatment method of electrode catalyst for fuel cell
  • Electrochemical surface treatment method of electrode catalyst for fuel cell
  • Electrochemical surface treatment method of electrode catalyst for fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A kind of electrochemical surface treatment method of PdFe / C catalyst for fuel cell, adopts figure 1 The shown three-electrode system electrochemical treatment device processes the PdFe / C catalyst, and the steps of the electrochemical surface treatment method are as follows:

[0047] (1) Palladium diacetylacetonate (Pd(acac) 2 ) and ferrous acetylacetonate (Fe(acac) 2 ) are mixed according to a mass ratio of 3:1 to obtain a mixed metal powder; the mixed metal powder is dispersed in a mixed solution composed of dibenzyl ether, oleylamine and oleic acid according to a volume ratio of 5:4:1; the The concentration of the mixed metal powder in the mixed solution is 3 mg / mL; ultrasonic treatment for 15 minutes, mixing evenly, and reacting at an oil bath temperature of 220°C for 30 minutes to obtain a metal product; after the reaction, cool to room temperature, and add Carbon black, the mass ratio of metal product and carbon black is 1: 4, stirs 12h, centrifuges, gets solid ...

Embodiment 2

[0056] A kind of electrochemical surface treatment method of PtCu / C catalyst for fuel cell, adopts figure 1 The shown three-electrode system electrochemical treatment device processes the PtCu / C catalyst, and the steps of the electrochemical surface treatment method are as follows:

[0057] (1) Platinum diacetylacetonate (Pt(acac) 2 ) and copper acetylacetonate (Cu(acac) 2 ) are mixed according to a mass ratio of 3:2 to obtain a mixed metal powder; the mixed metal powder is dispersed in a mixed solution composed of bibenzyl ether, oleylamine and oleic acid according to a volume ratio of 5:4:1; the The concentration of the mixed metal powder in the mixed solution is 3 mg / mL; ultrasonic treatment for 15 minutes, mixing evenly, and reacting at an oil bath temperature of 220°C for 30 minutes to obtain a metal product; after the reaction, cool to room temperature, and add Carbon black, the mass ratio of metal product and carbon black is 1: 4, stirs 12h, centrifuges, gets solid ma...

Embodiment 3

[0065] A kind of electrochemical surface treatment method of PtCuNi / C catalyst for fuel cell, adopts figure 1 The shown three-electrode system electrochemical treatment device processes the PtCuNi / C catalyst, and the method steps are as follows:

[0066] (1) Pt(acac) 2 、Cu(acac) 2 and nickel acetylacetonate (Ni(acac) 2 ) mixed according to a mass ratio of 3:2:2 to obtain a mixed metal powder; dispersing the mixed metal powder in a mixed solution composed of bibenzyl ether, oleylamine and oleic acid according to a volume ratio of 5:4:1; The concentration of the mixed metal powder in the mixed solution is 3 mg / mL; ultrasonically treated for 15 minutes, mixed evenly, and reacted for 30 minutes at an oil bath temperature of 220° C. to obtain a metal product; Add carbon black, the mass ratio of metal product and carbon black is 1: 4, stir 12h, centrifuge, get solid material, wash 5 times to described solid material with lotion, described lotion is made of hexanaphthene and anhyd...

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Abstract

The invention relates to an electrochemical surface treatment method of an electrode catalyst for a fuel cell, and belongs to the technical field of fuel cells. The method comprises the following steps: putting an electrolyte solution in which a powdery electrode catalyst is dispersed into an electrolytic tank in a three-electrode electrochemical treatment device, and introducing gas required by electrochemical surface treatment into the electrolyte solution; enabling more than one of a working electrode substrate and an electrolyte solution in the three-electrode electrochemical treatment device to be in a moving state, applying potential to the working electrode substrate, and performing electrochemical surface treatment on an electrode catalyst; and after the electrochemical surface treatment is finished, separating the electrode catalyst from the electrolyte solution in a solid-liquid separation manner, and cleaning and drying the electrode catalyst to obtain the surface-treated electrode catalyst. According to the method, the treatment capacity of the catalyst is large, the treatment effect is uniform, and the problem of degradation of an electrolyte membrane in static electrochemical surface treatment is also avoided.

Description

technical field [0001] The invention relates to an electrochemical surface treatment method of an electrode catalyst for a fuel cell, belonging to the technical field of fuel cells. Background technique [0002] As a clean new energy conversion technology, fuel cells are widely used in automobiles, small power stations, aerospace and other fields. The anode fuel of the proton exchange membrane fuel cell is high-purity hydrogen, the cathode gas is air or oxygen, and the intermediate proton exchange membrane only allows cationic hydrogen to pass through. Under the action of the catalyst, the anode reacts with H 2 = 2H + + 2e - , the cathode reacts with O 2 + 4H + + 4e - =2H 2 O, H + The internal circuit is formed through the proton membrane, the electrons do work through the external circuit, and the product water is discharged from the cathode. During this process, chemical energy is converted into electrical energy. The output power of the fuel cell is related to...

Claims

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Application Information

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IPC IPC(8): C25B1/135C25C1/24
CPCC25C1/24C25B1/135
Inventor 李煜璟吴梦豪王化伟张梓厚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY