▎ 摘　　要

NOVELTY - Preparation of cobalt nickel selenium (Co0.1Ni0.75Se)/reduced graphene oxide (rGO) composite material comprises dispersing graphene oxide (GO) in deionized water, ultrasonically dispersing to form uniform dispersion A, sequentially adding nickel chloride hexahydrate (NiCl2.6H2O) and cobalt nitrate hexahydrate (Co(NO3)2.6H2O) into little deionized water, stirring and dissolving uniformly, slowly adding sodium selenite (Na2SeO3), ethanolamine solvent and hydrazine hydrate (N2H4.H2O), continuously stirring to form uniform mixed solution B, slowly adding the dispersion A into the mixed solution B, stirring uniformly, transferring into PTFE reaction kettle, sealing the reaction kettle, placing in an electric heating blast drying box, heating at 140 degrees C, reacting at constant temperature for 24 hours, washing the obtained product with water and ethanol, and drying. USE - Preparation of Co0.1Ni0.75Se/rGO composite material used for electrocatalytic hydrogen evolution catalyst (claimed). ADVANTAGE - The method uses one-step hydrothermal method, is controllable, and provides product with excellent electrochemical performance.