Catalyst for fuel cell
The present embodiment is a catalyst for a fuel cell including: a catalyst metal; and a carrier that supports the catalyst metal, in which an outer surface area of the carrier to an inner surface area of the carrier, which is a ratio between the inner and outer surface areas of the carrier, is 0.56 to 0.69, and a proportion of the catalyst metal supported on an outer surface of the carrier is 23% to 35%.
1 . A catalyst for a fuel cell, the catalyst comprising:
a catalyst metal; and
a carrier that supports the catalyst metal, wherein:
an outer surface area of the carrier to an inner surface area of the carrier, which is a ratio between the inner and outer surface areas of the carrier, is 0.56 to 0.69; and
a proportion of the catalyst metal supported on an outer surface of the carrier is 23% to 35%.
2 . The catalyst according to claim 1 , wherein the carrier is mesoporous carbon.
3 . The catalyst according to claim 1 , wherein the catalyst metal is platinum or a platinum alloy.
4 . The catalyst according to claim 2 , wherein the mesoporous carbon includes carbon particles having a pore volume of 80% or more in a pore diameter distribution of 2 nm to 10 nm with respect to a total pore volume in a pore diameter distribution of 1 nm to 100 nm.
5 . The catalyst according to claim 2 , wherein an average primary particle diameter of the mesoporous carbon is 70 nm or more and 250 nm or less.