▎ 摘　　要

NOVELTY - A graphene-coated silica-loaded metal nanoparticle composite has silica spherical support, metal nanoparticles supported on silica spherical support, and reduced graphene oxide layer coated on surface of silica spherical support loaded with metal nanoparticles. USE - Graphene-coated silica-loaded metal nanoparticle composite is used as catalyst for direct methanol-type fuel cell or hydrogen fuel cell (all claimed). ADVANTAGE - The graphene-coated silica-loaded metal nanoparticle composite has excellent conductivity and catalytic activity, and is prepared by simple method without using surfactant. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene-coated silica-loaded metal nanoparticle composite.