▎ 摘　　要

NOVELTY - The method for preparing monolayer graphene encapsulated copper nano particles involves forming single layer graphene encapsulated copper nanoparticles on the surface of the conductive substrate by chemical vapor deposition method. The conductive substrate is selected from three dimensional graphene foam, porous carbon foam and porous metal foam. USE - Method for preparing monolayer graphene encapsulated copper nano particles. ADVANTAGE - The method enables preparation of monolayer graphene encapsulated copper nano particles with particle size of 5-50 nm, increased unsaturated bond of surface copper atoms, improved reaction efficiency, and adopts atomic copper atom as reaction precursor.