▎ 摘　　要

NOVELTY - Preparing high activity and high stability graphene-supported hydrogen tungsten bronze electrocatalytic material comprises (i) adopting improved Hummer's method to prepare graphene oxide, and obtaining graphene oxide powder through freeze-drying; (ii) dispersing the graphene oxide powder in deionized water at a mass concentration of 1-2 mg/ml, ultrasonically processing at room temperature to form a dispersion liquid according to the mass ratio of graphene oxide powder and ammonium tungstate powder is 1: (0.5-2), injecting ammonium tungstate powder into dispersion liquid under magnetic stirring at room temperature, heating in a water bath and continuously magnetic stirring to make it evenly mixed, and freeze-drying to form a brown-yellow powder; and (iii) transferring brownish-yellow powder sample to the tube furnace, annealing at 400-600℃ for 1-4 hours to obtain a catalyst in which graphene oxide uniformly supports hydrogen tungsten bronze nanoparticles. USE - The material is useful in producing hydrogen by acid water electrolysis (claimed). ADVANTAGE - The material has low overpotential, small Tafel slope, high electrocatalytic activity, high electrocatalytic hydrogen evolution efficiency, excellent stability and low preparation cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for high activity and high stability graphene-supported hydrogen tungsten bronze electrocatalytic material prepared by the above method.