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A kind of preparation method of proton exchange membrane fuel cell catalyst

A proton exchange membrane, fuel cell technology, applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc. Anti-methanol and methanol oxidation intermediates poisoning, solve the problem of catalyst resources, improve the effect of stability and life

Active Publication Date: 2015-09-16
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

Therefore, people have done a lot of exploration and research around various low-Pt and non-Pt catalysts, and developed binary, ternary and even quaternary alloy catalysts, but the transition metals in such catalysts are easy to lose under acidic conditions, so that the catalyst Reduced stability
On the other hand, people have also begun to study other non-Pt noble metal catalysts such as Pd-based, Ir-based, Ru-based, etc. and non-noble metal catalysts, such as carbides, oxides, nitrogen oxides, carbonitrides, etc., but so far, such The catalytic performance of non-Pt catalysts is not as good as that of Pt catalysts
Platinum as a fuel cell catalyst still has the following serious problems: (1) The reserves are small
(2) Expensive
(3) Poor anti-drug ability

Method used

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  • A kind of preparation method of proton exchange membrane fuel cell catalyst

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Comparison scheme
Effect test

Embodiment 1

[0026] In the first step, by reducing the CoCl 2 ·6H 2 O to prepare Co particles. At 0.1 mol / L CoCl 2Add 10ml of polyvinylpyrrolidone (PVP) ethanol solution to the ethanol solution as a stabilizer, slowly add 0.05mol / L NaBH under stirring 4 Add the ethanol solution to the above mixed solution, and pass nitrogen gas to prevent the particles from being oxidized. Add NaBH 4 After reacting for 1 h with the ethanol solution, the solid and liquid were separated, and the product was washed with water to obtain Co nanoparticles.

[0027] In the second step, the reduction of RuCl with ethylene glycol 3 CoRu core-shell nanoparticles were prepared with Co particle suspension solution. The Co particles prepared in the previous step were dispersed in 20ml of ethylene glycol, and a certain amount of PVP was added as a stabilizer under stirring. After stirring for 30min, 0.05 mol / L RuCl was added dropwise 3 ethylene glycol solution. After mixing evenly, adjust the pH value to 11 with...

Embodiment 2

[0033] In the first step, by reducing the CoCl 2 ·6H 2 O to prepare Co particles. At 0.1 mol / L CoCl 2 Add 10ml of polyvinylpyrrolidone (PVP) ethanol solution to the ethanol solution as a stabilizer, slowly add 0.05mol / L NaBH under stirring 4 Add the ethanol solution to the above mixed solution, and pass nitrogen gas to prevent the particles from being oxidized. Add NaBH 4 After reacting for 1 h with the ethanol solution, the solid and liquid were separated, and the product was washed with water to obtain Co nanoparticles.

[0034] In the second step, the reduction of RuCl with ethylene glycol 3 CoRu core-shell nanoparticles were prepared with Co particle suspension solution. The Co particles prepared in the previous step were dispersed in 20ml of ethylene glycol, and a certain amount of PVP was added as a stabilizer under stirring. After stirring for 30min, 0.05 mol / L RuCl was added dropwise 3 ethylene glycol solution. After mixing evenly, adjust the pH value to 12 wit...

Embodiment 3

[0040] In the first step, by reducing the CoCl 2 ·6H 2 O to prepare Co particles. At 0.1 mol / L CoCl 2 Add 10ml of polyvinylpyrrolidone (PVP) ethanol solution to the ethanol solution as a stabilizer, slowly add 0.05mol / L NaBH under stirring 4 Add the ethanol solution to the above mixed solution, and pass nitrogen gas to prevent the particles from being oxidized. Add NaBH 4 After reacting for 1 h with the ethanol solution, the solid and liquid were separated, and the product was washed with water to obtain Co nanoparticles.

[0041] In the second step, the reduction of RuCl with ethylene glycol 3 CoRu core-shell nanoparticles were prepared with Co particle suspension solution. The Co particles prepared in the previous step were dispersed in 20ml of ethylene glycol, and a certain amount of PVP was added as a stabilizer under stirring. After stirring for 30min, 0.05 mol / L RuCl was added dropwise 3 ethylene glycol solution. After mixing evenly, adjust the pH value to 12 wit...

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Abstract

The invention discloses a preparation method of a proton exchange membrane fuel battery catalyst. The novel fuel battery catalyst of a core-shell structure consists of a conductive carrier and ternary core-shell structured nano grains; and the preparation method comprises the following steps of: step one, preparing Co particles by reducing CoCl2.6H2O, namely, adding a PVP (Polyvinyl Pyrrolidone) ethanol solution into an ethanol solution of CoCl2 to be used as a stabilizer, and slowly adding a NaBH4 ethanol solution under stirring so as to carry out reduction to prepare the Co particles; step two, preparing Co@Ru core-shell type nano grains by reducing RuCl3 and a Co particle suspension solution by using ethylene glycol; and step three, preparing a ternary core-shell Co-Ru@Pt / C catalyst by further reducing H2PtCl6, the Co@Ru core-shell type nano grains and the mixed suspension solution by using ethylene glycol. The catalyst has the advantages of low Pt capacity and high catalysis activity.

Description

technical field [0001] The invention belongs to the field of fuel cell catalysts, in particular to a method for preparing a proton exchange membrane fuel cell catalyst. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy into electrical energy through electrochemical reactions. It has the advantages of high efficiency, environmental friendliness, low noise and high reliability, so it is highly valued by governments, enterprises and related research institutions around the world. . However, the commercial application of fuel cells is still constrained by high cost, durability and reliability, and insufficient infrastructure. Pt catalyst, known as a universal catalyst, is a major constraint. Catalyst is one of the key components of fuel cells, which almost determines the development and commercialization of fuel cell technology. At present, a 100 kW fuel cell vehicle needs about 100 g of Pt, and the proven reserves of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/02H01M4/92B01J35/00
CPCY02E60/50
Inventor 张治国胡桂林李国能郑友取
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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