Preparation method of proton-exchanging membrane fuel-cell catalyst composite carrier

A proton exchange membrane and fuel cell technology, applied in the field of electrochemistry, can solve the problems of uneven distribution of metal oxides, affecting the performance of active components of catalysts, etc., achieving easy control of the preparation process, simple and easy operation of the preparation method, and improved oxygen reduction activity. Effect

Inactive Publication Date: 2012-06-27
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composite carrier obtained by this preparation method has uneven distribution of metal oxides on it, which will seriously affect the performance of the active component of the catalyst when used as a carrier to support the catalyst.

Method used

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  • Preparation method of proton-exchanging membrane fuel-cell catalyst composite carrier
  • Preparation method of proton-exchanging membrane fuel-cell catalyst composite carrier

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preparation example Construction

[0023] The invention provides a method for preparing a proton exchange membrane fuel cell catalyst composite carrier, comprising:

[0024] mixing the carrier base material with the heteropoly acid solution, mixing evenly and then filtering to obtain the carrier base material impregnated with the heteropoly acid;

[0025] The carrier substrate impregnated with the heteropolyacid is burned in an inert atmosphere to obtain the proton exchange membrane fuel cell catalyst composite carrier.

[0026] The present invention uses a liquid heteropolyacid solution as the source of metal oxides, mixes the heteropolyacid solution with the carrier substrate, makes the surface of the carrier substrate adsorb the heteropolyacid solution, then mixes evenly, and finally impregnates the The carrier substrate of the heteropolyacid solution is sintered. Heteropolyacids are a type of oxygen-containing polyacids composed of heteroatoms and polyatoms in a certain structure through the coordination b...

Embodiment 1

[0033] WO 3 Preparation and properties of -C complex carrier. Weigh 1g of activated carbon and add it to 50ml of 40mg / ml phosphotungstic acid solution, stir at room temperature for 6 hours, filter, do not wash with water, and dry in vacuum at 80°C for 4 hours, then the product is transferred to a tube furnace and heated at 600°C under nitrogen Heat treatment under protection for 4 hours. When phosphotungstic acid is heat-treated above 500°C, the decomposition product is WO 3 , so the product after heat treatment in the tube furnace is WO 3 -C composite carrier. figure 1 is the produced WO 3 TEM image of -C. It can be seen from the figure that WO 3 Evenly dispersed on the surface of activated carbon.

Embodiment 2

[0035] MoO 3 - Preparation of CNT composite carrier. The heteropoly acid is phosphomolybdic acid, the carbon material is multi-walled carbon nanotubes, and other preparation processes are the same as above.

[0036] figure 2 for MoO 3 -XRD pattern of CNT composite carrier, MoO can be seen from the figure 3 The diffraction peaks of the MoO 3 The existence of; 25° is the diffraction peak of the carbon (002) crystal plane, which proves the existence of carbon nanotubes.

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Abstract

The invention provides a preparation method of a proton-exchanging membrane fuel-cell catalyst composite carrier, which comprises the following steps of: mixing a carrier base material with a heteropoly-acid solution, and filtering after uniformly mixing to obtain the carrier base material dipped with heteropoly acid; and firing the carrier base material dipped with the heteropoly acid in an inert atmosphere to obtain the proton-exchanging membrane fuel-cell catalyst composite carrier. The catalytic efficiency of a catalyst can be improved through the composite carrier prepared by the preparation method provided by the invention. In addition, the preparation method provided by the invention has the advantages of simpleness and easiness in operation, controllable preparation process condition, energy saving and environmental protection.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing a proton exchange membrane fuel cell catalyst composite carrier. Background technique [0002] A fuel cell is a device that converts chemical energy directly into electrical energy through an electrochemical reaction. In 1839, Gove first proposed the concept of fuel cells. As an efficient and pollution-free energy conversion device, it has received more and more attention in recent years. At present, the fuel cells put into production and use mainly include the following categories: proton exchange membrane fuel cells (PEMFC), molten carbonate fuel cells (MCFC), and solid oxide fuel cells (SOFC). Among them, proton exchange membrane fuel cells are the most widely used. [0003] At present, in the field of proton exchange membrane fuel cells, in addition to the extensive research and use of proton exchange membrane fuel cells using hydrogen and oxygen fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 冯立纲刘长鹏姚世魁李晨阳邢巍
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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