Pt–Co nanostructures electrodeposited on graphene nanosheets for methanol electrooxidation

Abstract Glassy carbon electrode modified by Pt–Co nanostructures decorated on graphene nanosheets (Pt–Co/G/GCE), is fabricated. Co nanostructures are electro-deposited on graphene modified GC electrode and then Pt nanostructures are loaded on the surface of modified electrode by galvanic replacement reaction between Co nanostructures and H 2 PtCl 6 . The physical and electrochemical properties of Pt–Co/G/GCE are investigated by scanning electron microscopy, energy dispersive X-ray, cyclic voltammetry and chronoamperometry. The morphology of as-prepared graphene nanosheets is investigated by transmission electron microscopy. The prepared Pt–Co/G is used as the anode electrocatalyst for methanol electrooxidation. The fabricated electrocatalyst exhibits an enhanced electrocatlytic performance for methanol electrooxidation.