▎ 摘　　要

NOVELTY - Production of graphene and/or graphite nanoplatelet structures having thickness less than 100 nm, involves carrying out electrochemical reduction of carbon oxide in an electrochemical cell, and passing current between the electrodes in presence of carbon oxide. The electrochemical cell comprises a negative electrode including a transition metal, transition metal-containing alloy, transition metal-containing oxide, and/or transition metal-containing ceramic, a positive electrode, and an electrolyte. USE - Production of graphene and/or graphite nanoplatelet structures (claimed). ADVANTAGE - The method enables simple and economical production of graphene and/or graphite nanoplatelet structures having excellent quality, under room temperature and atmospheric pressure.