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Method for preparing methanol poisoning resistant cathode catalyst of fuel cell

A cathode catalyst, fuel cell technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc.

Inactive Publication Date: 2005-04-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the research on Pt intermetallic catalysts as DMFC cathode electrocatalysts has just started.

Method used

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  • Method for preparing methanol poisoning resistant cathode catalyst of fuel cell
  • Method for preparing methanol poisoning resistant cathode catalyst of fuel cell
  • Method for preparing methanol poisoning resistant cathode catalyst of fuel cell

Examples

Experimental program
Comparison scheme
Effect test

experiment approach 1

[0026] Dissolve chloroplatinic acid and bismuth chloride in 2mol / L hydrochloric acid at a molar ratio of 1:1, and add polyvinylpyrrolidone (PVP) as a protective agent, wherein the sum of polyvinylpyrrolidone, chloroplatinic acid and bismuth chloride The molar ratio is 15:1, and sodium borohydride is added under stirring conditions, wherein the molar ratio of sodium borohydride, chloroplatinic acid and bismuth chloride is 20:1, and nano-platinum-bismuth alloy and nano-platinum-bismuth metal are prepared compound sol. Add a certain amount of pretreated carbon powder into the sol and stir for several hours. The mass ratio of carbon powder to the sum of chloroplatinic acid and bismuth chloride is 4:1. After drying the sample under low pressure, use distilled water and acetone repeatedly washing and vacuum drying to obtain the carbon-supported nano-platinum-bismuth alloy and nano-platinum-bismuth intermetallic compound catalyst of the present invention.

experiment approach 2

[0028] Dissolve chloroplatinic acid and bismuth chloride in 2mol / L hydrochloric acid at a molar ratio of 1:2, and add polyvinylpyrrolidone (PVP) as a protective agent, wherein the sum of polyvinylpyrrolidone, chloroplatinic acid and bismuth chloride The molar ratio is 15:1, and sodium borohydride is added under stirring conditions, wherein the molar ratio of sodium borohydride, chloroplatinic acid and bismuth chloride is 20:1, and nano-platinum-bismuth alloy and nano-platinum-bismuth metal are prepared compound sol. Add a certain amount of pretreated carbon powder into the sol and stir for several hours. The mass ratio of carbon powder to the sum of chloroplatinic acid and bismuth chloride is 4:1. After drying the sample under low pressure, use distilled water and acetone repeatedly washing and vacuum drying to obtain the carbon-supported nano-platinum-bismuth alloy and nano-platinum-bismuth intermetallic compound catalyst of the present invention.

experiment approach 3

[0030]Dissolve chloroplatinic acid and bismuth chloride in 2mol / L hydrochloric acid at a molar ratio of 1:5, and add polyvinylpyrrolidone (PVP) as a protective agent, wherein the sum of polyvinylpyrrolidone, chloroplatinic acid and bismuth chloride The molar ratio is 15:1, and sodium borohydride is added under stirring conditions, wherein the molar ratio of sodium borohydride, chloroplatinic acid and bismuth chloride is 20:1, and nano-platinum-bismuth alloy and nano-platinum-bismuth metal are prepared compound sol. Add a certain amount of pretreated carbon powder into the sol and stir for several hours. The mass ratio of carbon powder to the sum of chloroplatinic acid and bismuth chloride is 4:1. After drying the sample under low pressure, use distilled water and acetone repeatedly washing and vacuum drying to obtain the carbon-supported nano-platinum-bismuth alloy and nano-platinum-bismuth intermetallic compound catalyst of the present invention.

[0031] Preparation method ...

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Abstract

This invention relates to a process method of negative electrode catalyst used in fuel cell against methanol poisoning, which comprises the following steps: to dissolve the chloroplatinic acid and bismuth chloride into muriatic acid with mol proportion of one to 5; to add PVP with mol proportion of 15 to 1 with the sum of chloroplationic acid and bismuth chloride to get sol by adding sodium borohydride through mixture; to add one gram carbon power to each 10 ml acet and HNO#-[3] solvent and to each 6mol / L HNO#-[3] to get the pre-processed carbon powder; to add the powder into the sol for five to eight hours; then to bacon the sample with low voltage and rotation and to do the washing and vacuum drying.

Description

technical field [0001] The invention relates to a method for preparing a cathode catalyst for a fuel cell resistant to methanol poisoning—a carbon-supported nano-platinum-bismuth alloy / intermetallic compound catalyst, which belongs to the field of fuel cell material science and technology and the field of electrocatalysis. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a device that directly converts chemical energy into electrical energy, and has high energy conversion efficiency because it is not limited by the Carnot cycle. Using hydrogen as fuel, oxygen or air as oxidant, and the main product is water, is an ideal environment-friendly energy conversion technology. In the 1990s, the research boom of direct methanol fuel cell (DMFC) was triggered. Compared with other types of fuel cells, the development of DMFC faces an obstacle - "methanol breakthrough" problem. This is because the Nafion membrane commonly used in DMFC has a high methanol pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/16B01J23/42H01M4/88H01M4/90H01M4/92
CPCY02E60/50
Inventor 袁嵘夏定国张丽娟赵煜娟
Owner BEIJING UNIV OF TECH
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