▎ 摘　　要

NOVELTY - Preparing nickel-cobalt metal organic framework nano ball/oxidized graphene composite material, comprises (i) mixing graphene oxide with solvent, and performing first ultrasonic treatment to obtain oxidized graphene dispersion liquid, where the solvent is dimethylformamide, mixed solution of ethanol and water, (ii) mixing the mixed solution of soluble cobalt salt, soluble nickel salt, trimesic acid and obtained graphene dispersion liquid, and performing second ultrasonic treatment to obtain second ultrasonic treated solution, and (iii) mixing obtained second ultrasonic treated solution and trimethylamine, and performing third ultrasonic treatment for coordination polymerization to obtain final product. USE - The composite material used in electric catalytic oxygen evolution reaction (claimed). ADVANTAGE - The composite material has simple preparation method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for nickel-cobalt metal organic framework nano ball/oxidized graphene composite material is prepared by above mentioned method.