Material for fuel cell electrode and fuel cell

H - Electricity – 01 – M

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H01M 4/86 (2006.01) H01M 4/92 (2006.01)

Patent

CA 2608096

An electrode material for fuel cell superimposed on the top and/or back of electrolyte membrane (1) as an electrode for fuel cell, which electrode material comprises catalyst particles, the catalyst particles composed of Pt- containing precious metal particles (2) enclosed in porous inorganic material (3), and a proton conducting substance. As the precious metal particles (2) are enclosed in the porous inorganic material (3), elution of Pt into the electrolyte membrane (1) can be avoided and any performance deterioration of the fuel cell attributed to the elution of Pt into the electrolyte membrane (1) can be inhibited.

Le matériau d'électrode de l'invention, destiné à une pile à combustible, est placé sur le dessus et/ou l'arrière de la membrane électrolytique (1), pour former une électrode pour pile à combustible. Ledit matériau d'électrode comprend des particules de catalyseur, lesquelles sont composées de particules de métal précieux contenant du platine (2) incorporées dans un matériau inorganique poreux (3), et une substance conductrice de protons. Les particules de métal précieux (2) étant incorporées dans le matériau inorganique poreux (3), l'élution de platine dans la membrane électrolytique (1) peut être évitée, ce qui empêche toute baisse des performances de la pile à combustible qui résulterait de ladite élution.

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