▎ 摘　　要

NOVELTY - Preparation of a composite material involves ultrasonically dispersing ammonium molybdate tetrahydrate, nickel nitrate and graphene oxide solution into deionized water, transferring the dispersion into PTFE-lined kettle, hydrothermally reacting the contents, solid-liquid separating the reaction product, washing, freeze-drying, calcining the freeze-dried product in a tubular furnace in inert atmosphere. USE - Preparation of nickel molybdate/graphene composite material used for electrocatalytic hydrogen evolution. ADVANTAGE - The method is simple and produces a composite material comprising molybdenum and nickel uniformly inserted into the graphene sheet, improving the agglomeration of graphene and utilizing the surface area of graphene. The process reduces the cathode potential of the hydroperoxosilicate electrode material. The environmentally-friendly composite material having excellent electrocatalytic redox effect and excellent recyclability is produced by controlling the hydrothermal temperature, hydrothermal time and mass ratio of the reactants.