METHOD FOR PRODUCING FUEL CELL CATALYST, FUEL CELL CATALYST, AND USES THEREOF

To provide a method for producing a fuel cell catalyst containing a metal oxycarbonitride having durability that is superior to that of conventional fuel cell catalysts. A method for producing a fuel cell catalyst comprising a metal oxycarbonitride, the method comprising: a step of producing a metal oxycarbonitride by heating a metal carbonitride in an inert gas containing oxygen gas; and a step of bringing the metal oxycarbonitride into contact with an acidic solution.