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US 10,950,869 B2Granted
Fuel cell electrode catalyst and method for producing the same
AssigneesCataler Corporation, Toyota Jidosha Kabushiki Kaisha
InventorsYousuke Horiuchi, Tomoaki Terada, Akihiro Hori, Nobuaki Mizutani, Hiroo Yoshikawa, Yusuke Itoh
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Abstract
An object of the present invention is to achieve both high initial performance and durability performance of a fuel cell. Such object can be achieved by using a fuel cell electrode catalyst that includes a solid carbon carrier and an alloy of platinum and cobalt supported on the carrier.
Claims10
A fuel cell electrode catalyst comprising:
- a solid carbon carrier,
- wherein the solid carbon is a carbon in which the rate of the outer surface area based on t-Plot relative to the BET surface area is greater than or equal to 40%;
- and
- an alloy of platinum and cobalt supported on the carrier,
- wherein the alloy is subjected to acid treatment to elute cobalt,
- wherein a molar ratio of platinum to cobalt in the alloy is 7 to 11:1,
- wherein an average particle diameter of the alloy is 3.5 to 4.1 nm, and
- wherein an amount of cobalt to be eluted is less than or equal to 115 ppm.
5 more elements
Dependencies are inferred from the claim text.