▎ 摘　　要

NOVELTY - Preparation of graphene electrocatalyst with hierarchical pore channel three-dimensional structure comprises mixing single layer graphene oxide dispersion liquid and hydrogen peroxide solution according to different volume ratios, heating and heat preserving to obtain graphene oxide sheet with holes, preparing a solution using the graphene oxide sheet with holes, mixing a porous graphene dispersion solution with graphene oxide dispersion liquid attached with a catalyst, carrying out hydrothermal reaction, after the reaction is finished, cooling in air, obtaining porous graphene hydrogel, freeze-drying to obtain porous graphene aerogel, annealing to obtain the final graphene aerogel with stable performance and graphene electrocatalyst with hierarchical porous three-dimensional structure. USE - The method is for preparation of graphene electrocatalyst with hierarchical pore channel three-dimensional structure used for efficient electrolysis of water to prepare oxygen (claimed). ADVANTAGE - The method realizes the effective balance regulation and control of ion transport and carrier transport in the electrocatalysis process, and solves the bottleneck problem of insufficient supply of reaction ions caused by excessive load exposure of an electrocatalysis active material, so that the electrocatalytic oxygen evolution performance of the catalyst is improved.