▎ 摘　　要

NOVELTY - A graphene-based metal catalyst comprises electrochemically stripped graphene and metal nanoparticles, where the electrochemically stripped graphene and metal nanoparticles are distributed on the surface of graphene. USE - Graphene-based metal catalyst for use as catalyst for hydrogenation reaction, dehydrogenation reaction and carbon dioxide conversion reaction (claimed). ADVANTAGE - The graphene-based metal catalyst has improved mechanical performance, conductivity and catalytic performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing graphene metal catalyst, which involves weighing 0.5-1.5 g ammonium sulfate, dissolving in 100 mL water as electrolyte, using platinum wire as negative electrode and graphite foil as positive electrode, connecting with DC power source for electrolysis and filtering to obtain a suspension, allowing the suspension for suction filteration, washing with deionized water and ethanol for more than 3 times and drying to obtain dried product, mixing the dried product with N,N-dimethylformamide, sonicating and discarding the bottom precipitate after standing, filtering the upper dispersion with a PTFE filter and drying to obtain electrochemically stripped graphene, followed by ultrasonically dispersing the electrochemically stripped graphene in a polar aprotic solvent, adding metal precursor, stirring at room temperature for 2 hours, adding reducing agent to the solution under the protection of nitrogen stream, heating at 70-90 degrees C, stirring for 0.5-1 hour, washing the mixture by centrifugation and drying to obtain the finished product.