Patent ID: 9660272
Date: 2017-05-23
CPC Classifications: H01M,Y02E

Claim:
1. An oxygen reduction catalyst comprising composite particles comprising a portion comprising an inorganic metal compound and a portion containing carbon, wherein the composite particles comprise a metal element M1, carbon, and oxygen as constituent elements; the metal element M1 is at least one metal element selected from elements belonging to Groups 2 to 7 and elements belonging to Groups 11 to 15; the amount of carbon atoms is 1 to 10 mol, and the amount of oxygen atoms is 1 to 3 mol, assuming that the total amount of atoms in the metal element M1 is 1 mol; a G-band and a D-band are present in a Raman spectrum, and a V/G ratio defined in an expression described below is 0.10 to 0.35: