▎ 摘　　要

NOVELTY - Method (M1) of forming a metal-alloy graphene nanocomposite (218), comprises: providing a graphene substrate; forming a conducting polymer layer (210) on a first major surface of the graphene substrate; pyrolyzing the conducting polymer layer to form a nitrogen-doped graphene substrate (212); and dispersing many metal-alloy nanoparticles (214) on a first surface (216) of the nitrogen-doped graphene substrate to form the nanocomposite. USE - The method is useful for forming a metal-alloy graphene nanocomposite which is useful as an electrocatalyst in a proton exchange membrane fuel cell, where the electrocatalyst is configured as an electrode of a proton exchange membrane fuel cell (all claimed), and the fuel cells are useful in an automotive and mobile applications. ADVANTAGE - The method provides electrocatalyst in a simple and cost-effective manner and in a non-toxic process. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a metal-alloy graphene nanocomposite comprising: a nitrogen-doped graphene substrate; and many metal-alloy nanoparticles dispersed on a first major surface of the nitrogen-doped graphene substrate; (2) an electrocatalyst, comprising: a nitrogen-doped graphene substrate; and many platinum-cobalt alloy nanoparticles dispersed on a first major surface of the nitrogen-doped graphene substrate; and (3) an electrocatalyst formed (M2) by providing a nitrogen-doped graphene substrate and dispersing many platinum-cobalt alloy nanoparticles on a first surface of the nitrogen-doped graphene substrate. DESCRIPTION OF DRAWING(S) - The figure illustrates materials and/or compositions used/formed at different stages of forming a metal-alloy graphene nanocomposite. Conducting polymer layer (210) Nitrogen-doped graphene substrate (212) Metal-alloy nanoparticles (214) First surface of nitrogen-doped graphene substrate (216) Metal-alloy graphene nanocomposite (218)