▎ 摘　　要

NOVELTY - Surface-coated graphene metal catalyst comprises comprises inorganic acid, amino-modified polyelectrolyte, graphene coating layer and metal nanoparticles loaded metal. USE - Surface-coated graphene metal catalyst. ADVANTAGE - The surface-coated graphene metal catalyst ensures simple structure of the surface-coated graphene metal catalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a surface-coated graphene metal catalyst, which involves: (A) dipping cordierite into inorganic acid solution for boiling the dipped cordierite or amino polyelectrolyte solution; (B) performing ultrasonic cleaning of the solution to obtain surface modified cordierite substrate; (C) placing modified cordierite substrate into graphene oxide solution; (D) uniformly stirring and mixing the obtained compound; and (E) drying and heating the heated compound with hydrogen or liquid to obtain the desired product.