| abstract |
The present invention provides a solid polymer fuel cell cathode catalyst that does not use platinum, is low-cost and is not limited by the amount of reserve resources, and has excellent performance as an electrode catalyst for a fuel cell. A bronze compound represented by the following general formula (1) (in the general formula (1), M represents a transition metal, A represents a metal, and M represents a maximum oxidation number that can be obtained and reduced from it). At least two kinds of mixed valences consisting of a small oxidation number are taken, A has a non-stoichiometric composition, and when y = 1, z is determined by the highest valence state that the transition metal M can take, 0.1 <X <1 In addition, when the metal A is a transition metal, the metal A is a transition metal of a different type from the transition metal M.) -Type fuel cell cathode catalyst. AxMyOz (1) [Selection figure] None |