Patent ID: 8785342

Claim:
An ink for producing a catalyst layer for a fuel cell produced by dispersing, in a solvent, a catalyst comprising a catalyst carrier comprising a metal oxycarbonitride and a catalyst metal supported on the catalyst carrier, wherein the metal oxycarbonitride has a composition represented by MC x N y O z in which M is at least one metal selected from the group consisting of niobium, tin, indium, tantalum, zirconium, copper, iron, chromium, hafnium, titanium, vanadium, cobalt, manganese, cerium, mercury, plutonium, gold, silver, palladium, yttrium, lanthanum, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and nickel, x, y and z are each a proportion of each atomic number and satisfy 0.01≦x≦2, 0.01≦y≦2, 0.01≦z≦3 and 1.7≦x+y+z≦5.