▎ 摘　　要

NOVELTY - Preparing transition metal-based heterostructure oxygen evolution catalyst, comprises dissolving nickel nitrate hexahydrate and iron(III) nitrate nonahydrate in N-methyl pyrrolidone to form a homogeneous solution, adding urea, heating in oil bath in nitrogen atmosphere, continuously stirring for 5-10 hours, cooling, washing and drying the precipitated product to obtain nickel-iron layered double hydroxide, dissolving nickel nitrate hexahydrate and iron(III) nitrate nonahydrate in N-methyl pyrrolidone solution to form a homogeneous solution A, dissolving sodium tungstate in deionized water and stirring to form a homogeneous solution B, adding nickel-iron layered double hydroxide into solution A and ultrasonically dispersing, dropping solution B, and stirring for 30-180 minutes at room temperature, washing precipitated product and drying, ultrasonically dispersing graphene in N-methyl pyrrolidone to form a uniform suspension, ultrasonically dispersing, cleaning and drying. USE - The transition metal-based heterostructure oxygen evolution catalyst is useful in the oxygen evolution reaction (claimed). ADVANTAGE - The transition metal-based heterogeneous structure oxygen evolution catalyst has low over-potential, high activity and conductivity of amorphous nickel-iron tungsten oxide of efficient synergistic catalytic action, and excellent water electrolysis performance. The catalyst can be prepared in simple and cost-effective manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for transition metal-based heterostructure oxygen evolution catalyst.