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Pt/Au/PdCo/C catalyst, and preparation and application thereof

A catalyst and alloying technology, which is applied in the field of preparation of oxygen reduction catalysts for direct liquid fuel cells, can solve the problems of poor ORR catalytic activity and reduced catalytic activity, and achieve the effects of improving ORR activity and electrochemical stability and reducing costs.

Active Publication Date: 2015-02-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ORR catalytic activity of Au itself is poor, and if it is introduced into the catalyst to cover the active sites of Pt, it may lead to a decrease in catalytic activity.

Method used

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  • Pt/Au/PdCo/C catalyst, and preparation and application thereof
  • Pt/Au/PdCo/C catalyst, and preparation and application thereof
  • Pt/Au/PdCo/C catalyst, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 28.2mg PdCl 2 and 9.6mg Co(NO 3 ) 2(Pd / Co atomic ratio is 3:1) was dissolved in 100 mL deionized water, 80 mg Vulcan XC-72 carbon powder was added and ultrasonically dispersed for 30 min. After being uniformly dispersed, add 25mmol L dropwise -1 Sodium citrate aqueous solution 25mL, then slowly add 80mmol L dropwise under rapid stirring -1 NaBH 4 Solution 25mL. After 30 minutes, the obtained product was filtered, washed with a large amount of deionized water, and dried in a vacuum oven at 80° C. for 8 hours to obtain a PdCo / C catalyst. PdCo / C catalyst at 400 °C, 5vol% H 2 Alloyed PdCo / C catalyst can be obtained by heat treatment in / Ar atmosphere for 2h.

[0039] Disperse 5 mg of alloyed PdCo / C catalyst in 2 mL of ethanol, and add 30 μL of 5% Nafion emulsion as a binder. After ultrasonic dispersion for 15 min, 20 μL of the slurry was pipetted and coated on the surface of a glassy carbon electrode as a working electrode. Place the working electrode in 50m...

Embodiment 2

[0041] Weigh 28.2mg PdCl 2 and 9.6mg Co(NO 3 ) 2 (Pd / Co atomic ratio is 3:1) was dissolved in 100 mL deionized water, 80 mg Vulcan XC-72 carbon powder was added and ultrasonically dispersed for 30 min. After being uniformly dispersed, add 25mmol L dropwise -1 Sodium citrate aqueous solution 25mL, then slowly add 80mmol L dropwise under rapid stirring -1 NaBH 4 Solution 25mL. After 30 minutes, the obtained product was filtered, washed with a large amount of deionized water, and dried in a vacuum oven at 80° C. for 8 hours to obtain a PdCo / C catalyst. PdCo / C catalyst at 400 °C, 5vol% H 2 Alloyed PdCo / C catalyst can be obtained by heat treatment in / Ar atmosphere for 2h.

[0042] Disperse 5 mg of alloyed PdCo / C catalyst in 2 mL of ethanol, and add 30 μL of 5% Nafion emulsion as a binder. After ultrasonic dispersion for 15 min, 20 μL of the slurry was pipetted and coated on the surface of a glassy carbon electrode as a working electrode. Place the working electrode in 50...

Embodiment 3

[0044] Weigh 28.2mg PdCl 2 and 9.6mg Co(NO 3 ) 2 (Pd / Co atomic ratio is 3:1) was dissolved in 100 mL deionized water, 80 mg Vulcan XC-72 carbon powder was added and ultrasonically dispersed for 30 min. After being uniformly dispersed, add 25mmol L dropwise -1 Sodium citrate aqueous solution 25mL, then slowly add 80mmol L dropwise under rapid stirring -1 NaBH 4 Solution 25mL. After 30 minutes, the obtained product was filtered, washed with a large amount of deionized water, and dried in a vacuum oven at 80° C. for 8 hours to obtain a PdCo / C catalyst. PdCo / C catalyst at 400 °C, 5vol% H 2 Alloyed PdCo / C catalyst can be obtained by heat treatment in / Ar atmosphere for 2h.

[0045] Disperse 5 mg of alloyed PdCo / C catalyst in 2 mL of ethanol, and add 30 μL of 5% Nafion emulsion as a binder. After ultrasonic dispersion for 15 min, 20 μL of the slurry was pipetted and coated on the surface of a glassy carbon electrode as a working electrode. Place the working electrode in 50...

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Abstract

The invention provides a Pt / Au / PdCo / C catalyst. Preparation of the catalyst comprises the following two steps: (1) preparation of alloyed PdCo / C; and (2) preparation of the Pt / Au / PdCo / C catalyst. The catalyst has the advantages of low Pt load, high electrochemical stability and the like and can be used as a cathodic oxygen reduction catalyst of a metal-air fuel cell, a proton exchange membrane fuel cell and a direct liquid fuel cell.

Description

technical field [0001] The invention relates to an oxygen reduction catalyst, in particular to the preparation and application of an oxygen reduction catalyst for a metal-air fuel cell, an oxygen reduction catalyst for a proton exchange membrane fuel cell, and an oxygen reduction catalyst for a direct liquid fuel cell. Background technique [0002] With the increasing consumption of fuels such as coal, oil and natural gas and the depletion of energy resources, it is urgent to find energy technologies that are environmentally friendly and sustainable. Because of its high energy conversion efficiency, no pollution, no noise and other advantages, fuel cells have become a research hotspot all over the world. [0003] At present, the most effective catalysts for fuel cell cathode ORR catalysts are still Pt and its alloy catalysts. However, the limited reserves and high price of Pt have become one of the obstacles to the commercialization of fuel cells. How to increase the utili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92B01J23/89H01M4/86
CPCY02E60/50
Inventor 孙公权唐琪雯姜鲁华姜黔其他发明人请求不公开姓名
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI