Solid polymer type fuel cell catalyst, solid polymer type fuel cell electrode, and fuel cell
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsTakashi Iijima, Kenichiro Tadokoro, Hideaki Sawada
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Abstract
The present invention has as its object the provision of a solid polymer fuel cell catalyst exhibiting high durability and high power generation performance regardless of the humidification conditions or load conditions. The present invention relates to a solid polymer type fuel cell catalyst which is comprised of a carbon material which carries a catalyst ingredient, wherein the amount of adsorption of water vapor (V10) at 25° C. and a relative humidity of 10% of the carbon material is 2 ml/g or less and the amount of adsorption of water vapor (V90) at 25° C. and a relative humidity of 90% of the carbon material is 400 ml/g or more.
Claims12
A catalyst for a solid polymer membrane fuel cell which is comprised of a carbon material which carries a catalyst ingredient which has an oxygen reducing activity, said catalyst characterized in that said carbon material has an amount of adsorption of water vapor (V10) at 25° C. and a relative humidity of 10% of 2 ml/g or less and in that said carbon material has an amount of adsorption of water vapor (V90) at 25° C. and a relative humidity of 90% of 400 ml/g or more to 2000 mL/g or less.
Dependencies are inferred from the claim text.