Patent ID: 7666809
Filing Date: 2010-02-23
Classification: H01M,Y02E

Abstract:
1. An electrode catalyst for fuel cells, wherein the electrode catalyst is a metal catalyst onto which is adsorbed a compound having at least one functional group which comprises a sulfur element or a nitrogen element as a part or all of constituent atoms and at least one proton-accepting group, and the compound is represented by the following formula (1), (2), (3), (4) or (5): wherein Z represents the functional group which comprises a sulfur element or a nitrogen element as a part or all of constituent atoms, L represents a linkage group having a valence of (m+n), A represents the proton-accepting group, k represents a valence number of Z, provided that when k is not 1, A, L and m each may be the same or different, m and n are each an integer of 1 to 5, provided that when m or n is not 1, A or Z ma be the same or different, wherein A, Z, m and n are each the same as defined in formula (1), Q 1 represents a cyclic group, L 1 represents a linkage group having a valence of (n+1), L 2 represents a linkage group having a valence of (m+1), p is an integer of 1 to 10 and k1 is a valence number of Z, provided that when k1 is not 1, A, L 1 , Q 1 and m are each the same or different, wherein A, Z, m, n and Q 1 are each the same as defined in formula (2) or (3), L 3 is a bond or a bivalent linkage group, Q 2 is the same as defined in Q 1 of formula (2), q1 represents a valence number of a cyclic group represented by Q 2 , q 2 represents a valence number of a cyclic group represented by Q 1 , and k2 represents a valence number of Z, provided that when k2 is not 1, A, L 3 , Q 1 , Q 2 , m, q1 and q2 are each the same or different.