▎ 摘　　要

NOVELTY - Preparation of graphene composite material loaded with nickel-cobalt tetrasulfide nanosheets involves: (1) evenly dispersing graphene oxide in deionized water, adding an aqueous solution of nickel nitrate and cobalt nitrate, then adding p-aminobenzoic acid and ammonia as a reducing agent, stirring, centrifuging, washing, vacuum drying and annealing in air at 300-400 degrees C for 1-2 hours to prepare nickel cobaltite/reduced graphene oxide precursor; and (2) annealing the precursor and sulfur powder under argon atmosphere at 250-350 degrees C for 1-2 hours. USE - The method is useful for preparing nickel-cobalt tetrasulfide nanosheet-loaded graphene composite material, which is useful as electrocatalyst for oxygen evolution reaction of electrolytic water (claimed). ADVANTAGE - The method prepares the nickel-cobalt tetrasulfide nanosheet-loaded graphene composite material with excellent electrocatalytic performance and stability.