▎ 摘　　要

NOVELTY - Preparing graphene-supported cobalt/CoCx heterojunction composite copper foam electrocatalyst material, comprises placing amine, alkali, and graphene in a mixed solvent of alcohol and water, subjecting to hydrothermal reaction at 100-150℃ to prepare a precursor; and (ii) placing precursor and the soluble cobalt salt in an alcohol solvent, and performing annealing treatment at 300-600° C. under a protective gas atmosphere to prepare the electrocatalytic material. The alkali is sodium hydroxide or potassium hydroxide. The soluble cobalt salt is cobalt nitrate, cobalt acetate or cobalt sulfate, the alcohol solvent is ethanol. USE - The material is useful in the production of hydrogen by electrolyzing water (claimed). ADVANTAGE - The graphene load Co/CoCx heterojunction composite foam copper electro-catalytic material has complete structure, no damage, high catalyst load amount, good catalytic performance, and simple operation process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene-supported cobalt/CoCx heterojunction composite copper foam electrocatalyst material.