▎ 摘　　要

NOVELTY - Preparing nitrogen-doped carbon compound graphene coated metal cobalt catalyst comprises taking carbon source, nitrogen source and graphene oxide as reaction raw material, adding liquid medium, reacting at 180-220 degrees C for 10-15 hours to obtain nitrogen-doped carbon compound graphene precursor, uniformly dispersing cobalt salt and nitrogen-doped carbon compound graphene precursor in organic solvent, stirring and reacting for 0.5-1 hour at 50-75 degrees C, washing, drying to obtain nitrogen-doped carbon compound graphene coated metal cobalt precursor, and reacting under mixed atmosphere of hydrogen and argon gas for 1-6 hours at 300-600 degrees C to obtain nitrogen-doped carbon compound graphene coated metal cobalt catalyst. USE - The catalyst is useful for producing hydrogen by electrolyzing water (claimed). ADVANTAGE - The method: is economical, simple, and is suitable for mass production; and has safety in period, and simple device. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for nitrogen-doped carbon compound graphene coated metal cobalt catalyst prepared by the above preparation method.