▎ 摘　　要

NOVELTY - The graphene composite material is formed by doping nitrogen atoms into the carbon lattice of graphene to form a graphene nitrogen structure, and supporting platinum-nickel nanoparticles on a carbon mesh. The graphene composite material is provided with an X-ray photoelectron energy full spectrum and/or X-ray photoelectron energy peak fitting spectrum. X-ray photoelectron energy full spectrum of the graphene composite material is provided with main peaks at 75.55 eV, 287.31 eV 287.31 eV, 402.31 eV, 534.31 eV, 534.31 eV and 858 eV. X-ray photoelectron energy splitting fitting spectrum of the graphene composite material is provided with main peaks at 68.02 eV, 72.31 eV, 75.60 eV, 72.31 eV, 284.41 eV, 284.41 eV and 285.15 eV. USE - Graphene composite material used for working electrode of electrochemical sensor (all claimed). ADVANTAGE - The graphene composite material is provided with excellent adsorption and catalysis capabilities for hydrogen peroxide, and electrochemical signals are effectively amplified, so that rapid tumor diagnosis is realized. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating the preparation of graphene composite material used for working electrode.