▎ 摘　　要

NOVELTY - Producing ruthenium cobalt oxide catalyst comprises (a) dissolving ruthenium precursor and cobalt precursor in deionized water, (b) preparing graphene oxide solution, (c) mixing the metal salt solution and graphene oxide solution by ultrasonication, (d) performing aerosol pyrolysis with the mixed solution obtained in step (c), and (e) heat-treating the catalyst obtained in step (d) at 150-500 degrees C. The metal salt solution contains less than or equal to 16 wt.% ruthenium. The ruthenium cobalt oxide catalyst is a binary metal oxide (bimetallic ruthenium-cobalt oxide) in which ruthenium is present in the intercalated form in the lattice of cobalt oxide, and reduced during the heat treatment of due to the partial oxidation of fin oxide, and it is formed into a porous structure including pores that can facilitate mass transfer of water as a reactant and oxygen gas as a product. USE - The catalyst is useful for oxygen evolution reaction in fuel cell and water electrolysis fields. ADVANTAGE - The catalyst: improves reaction rate; has good stability; and is economical. The method is simple. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) manufacturing electrode for water electrolysis; and (2) manufacturing water electrolysis cell.