| abstract |
Provided is a catalyst which has excellent durability and high oxygen reducing ability, and which is not corroded in an acidic electrolyte or at high electric potential. The catalyst is characterized by comprising a metal carbonitride oxide which contains zirconium and/or titanium, and also contains two metallic elements (M) selected from the group comprising tin, indium, platinum, tantalum, zirconium, titanium, copper, iron, tungsten, chromium, molybdenum, hafnium, vanadium, cobalt, cerium, aluminum, and nickel. |