▎ 摘　　要

NOVELTY - A high-performance graphene-supported mesoporous nickel-iron alloy composite electrocatalyst comprises metal alloy with ordered mesopores dispersedly supported on graphene surface with high surface area to form graphene-supported mesoporous nickel-iron alloy composite material. The mesoporous nickel-iron alloy has spherical structure. USE - High-performance graphene-supported mesoporous nickel-iron alloy composite electrocatalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the electrocatalyst comprising using improved Hummers method in exfoliating oxidized natural graphite powder to synthesize graphene oxide, washing obtained graphene oxide repeatedly by centrifugation with 5% dilute hydrochloric acid and deionized water until supernatant is neutral to remove excess reactants, collecting graphene oxide by centrifugation, and freeze-drying; dispersing graphene oxide obtained in stannous chloride-hydrochloric acid solution, mixing for 10 minutes, washing with deionized water, adding graphene and stannous chloride mixed water liquid, mixing hydrochloric acid solution of palladium chloride for 5 minutes; washing with deionized water and collecting by centrifugation to obtain graphene oxide supported mesoporous palladium particles; preparing hydrochloric acid solution with pH of 2.0-3.0, adding nickel chloride hexahydrate, ferrous chloride tetrahydrate, and graphene oxide supported mesoporous palladium particles, heating hydrochloric acid solution and non-ionic surfactant cetyl alcohol polyoxyethylene ether continuously, and stirring until uniform lyotropic liquid crystal mixture is formed; and adding dimethylamine borane to lyotropic liquid crystal for reduction, reducing nickel and iron, depositing and growing around palladium nanoparticles, and removing surfactant with absolute ethanol.