Electrode catalyst for fuel cell

Details Electrode catalyst for fuel cell Electrode catalyst for fuel cell

H - Electricity

01

M

H01M 4/92 (2006.01)

Patent

CA 2591040

Disclosed is an electrode catalyst comprising: (a) a support with a specific surface area of at least 1200 m /g; and (b) platinum or platinum-containing alloy particles on the support, wherein the platinum is supported on the electrode catalyst in an amount of 56~90 wt% based on the total weight of the electrode catalyst. A membrane electrode assembly (MEA) comprising the electrode catalyst and a fuel cell using the MEA are also disclosed. The electrode catalyst comprises platinum or platinum-containing alloy particles highly dispersed on a support with a large surface area in an amount of 56 wt% or more, and thus has an extended catalytically active region, resulting in improvement in the quality of a fuel cell.

L'invention porte sur un catalyseur d'électrode comprenant (a) un support pourvu d'une surface spécifique d'au moins 1200 m /g; et (b) du platine ou des particules d'alliage contenant du platine sur le support, le platine étant soutenu sur la catalyseur d'électrode dans un quantité comprise entre 56~90 % en poids en fonction de la masse totale du catalyseur d'électrode. L'invention concerne également un ensemble électrode de membrane (MEA) comprenant le catalyseur d'électrode et une pile à combustible utilisant le MEA. Le catalyseur d'électrode comprend du platine ou des particules d'alliage contenant du platine hautement réparties sur un support doté d'une surface large selon une quantité de 56 % en poids ou plus, et présente par conséquent une zone catalytique active étendue, ce qui permet d'améliorer la qualité d'une pile à combustible.

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