| abstract |
Provided are a fuel cell electrode, a membrane electrode assembly, and a fuel cell that can supply a stable output even at high temperatures and can maintain power generation performance over a long period of time. A catalyst carrier A selected from Sn-doped In 2 O 3 , F-doped SnO 2 or Sb-doped SnO 2 and an oxide particle phase B chemically bonded to the surface of the catalyst carrier. A fuel cell electrode comprising a catalyst composite comprising a proton conductive inorganic oxide and a redox catalyst phase C supported on the surface thereof, and a catalyst layer comprising a binder, and A membrane electrode assembly and a fuel cell. In the catalyst composite, a catalyst carrier is dispersed in a solution containing a substance that is a raw material for the oxide particle phase, and heat treatment is performed to form a proton conductive inorganic oxide, and the proton conductive inorganic oxide is further converted into a catalyst precursor. It is produced by dispersing in a solution containing the body and depositing the catalyst phase by heat treatment or pH adjustment. [Selection] Figure 1 |