▎ 摘　　要

NOVELTY - A nitrogen/metal atom-doped hollow polyhedron nano carbon shell material has regular hollow polyhedron structure, particle size of 5-50 nm, layers of graphene and mesoporous structure of 2-10 nm. USE - Nitrogen/metal atom-doped hollow polyhedron nano carbon shell material is used for cathode catalyst of fuel cell. ADVANTAGE - The nitrogen/metal atom-doped hollow polyhedron nano carbon shell material has excellent electrochemical oxygen reduction characteristics, catalytic characteristics under alkaline condition, and half-slope potential of more than 0.84 V vs. RHE. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nitrogen/metal atom-doped hollow polyhedron nano carbon shell material, which involves providing porous metal-organic framework material with wall thickness of less than 20 nm, placing powder sample in high-temperature furnace, maintaining sample in inert atmosphere, calcining, carbonizing and naturally cooling mixture, taking powder in predetermined amount of sample solution, scattering nano-carbon sheet and nitrogen/metal atoms-doped nano-carbon shell mixture, separating solution to obtain high-purity nitrogen/metal atom-doped nano-carbon shell solution and drying solution.