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Method for preparing platinum-based catalyst for fuel cell

A fuel cell and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve problems such as limiting the application of Pt-based catalysts, and achieve the effect of increasing mutual contact and improving utilization.

Inactive Publication Date: 2012-11-14
SHANGHAI JINZHONG INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price and shortage of metal platinum limit the application of Pt-based catalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First prepare the carbon carrier: mix granular carbon black and linear carbon nanotubes at a mass ratio of 1:3, add them to a container, add isopropanol and water, use ultrasonic waves to disperse evenly, filter with suction, obtain a filter cake, and dry it. Under the protection of inert gas, pyrolysis at 300° C. for 2 hours to obtain multi-element composite carbon carrier.

[0016] The metal salt precursor H 2 Pt(NO 3 ) 6 · 4H 2 O joins in the propylene glycol solvent together with sodium citrate or sodium oxalate and ethylene glycol, and the mixed solution is stirred at room temperature for 20 minutes, and the mass volume concentration of the metal salt precursor in the mixed solution is 5g / L, and ethylene glycol and propylene glycol solvent The volume ratio is 1:5, the metal salt precursor H 2 Pt(NO 3 ) 6 · 4H 2 The mass ratio of O to the complexing agent is 1:3; Add sodium hydroxide to the resulting mixed solution to adjust the pH value to 9; Add the above...

Embodiment 2

[0021] First prepare the carbon carrier: mix granular carbon black and linear carbon nanotubes at a mass ratio of 1:5, add them to a container, add isopropanol and water, use ultrasonic waves to disperse evenly, filter with suction to obtain a filter cake, and dry it. Under the protection of an inert gas, pyrolysis at a temperature of 500°C for 3 hours to obtain a multi-element composite carbon carrier.

[0022] The metal salt precursor H 2 Pt(NO 3 ) 6 · 4H 2 O joins in the ethylene glycol solvent together with sodium citrate or sodium oxalate and glycerol, and the mixed solution is stirred at room temperature for 40 minutes, and the mass volume concentration of the metal salt precursor in the mixed solution is 25g / L, glycerol and The volume ratio of ethylene glycol solvent is 1:2, the metal salt precursor H 2 Pt(NO 3 ) 6 · 4H 2 The mass ratio of O to the complexing agent is 7:1; add sodium hydroxide to adjust the pH value to 9~13; add the previously prepared carbon c...

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Abstract

The invention discloses a method for preparing a platinum-based catalyst for the fuel cell, comprising the following steps: adding a metal salt precursor which is H2Pt (NO3)6.4H2O, sodium citrate or sodium oxalate and an alcohol reducing agent to an organic solvent, adding sodium hydroxide to adjust the pH value, adding a carbon carrier, stirring at room temperature so that the metal sol particles are uniformly dispersed on the carbon carrier, adding oxalic acid to adjust the pH value, filtrating, drying in vacuum, cooling and grinding to obtain the platinum-based catalyst for the fuel cell, wherein the carbon carrier is the composite of the granular carbon black and the linear carbon nanotube.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a fuel cell platinum-based catalyst. Background technique [0002] In recent years, through the efforts of scientists and related industry personnel from various countries, the key materials and system integration technology of fuel cells have achieved rapid development, and the supporting industries have also become increasingly mature. Proton exchange membrane fuel cells (PEMFC) and direct alcohol fuel cells (DAFC) are considered to be the most promising fuel cells for transportation, communication and other mobile applications, because these two types of batteries are used in vehicle power sources, various mobile communication Therefore, the research on this kind of fuel cell has been highly valued by various countries. Catalyst materials are one of the most critical materials for these two types of fuel cells. Catalyst development is one of the mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42H01M4/92
CPCY02E60/50
Inventor 姜波
Owner SHANGHAI JINZHONG INFORMATION TECH
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