▎ 摘　　要

NOVELTY - Preparing thin-layer oxygen-containing graphdiyne-coated metal composite catalyst involves mixing the graphdiyne powder and the oxidant, and oxidizing to obtain the graphdiyne oxide, mixing the graphdiyne oxide with an alkaline solution, and peeling off to obtain a thin-layer oxygen-containing graphdiyne dispersion. A three-electrode system using the thin-layer oxygen-containing graphdiyne dispersion as an electrolyte and a metal compound nanosheet as a working electrode performs an electrochemical reduction reaction, and obtained thin-layer oxygen-containing graphdiyne-coated metal composite catalyst. The thickness of the thin-layer oxygen-containing graphene in the thin-layer oxygen-containing graphene-coated metal composite catalyst is less than 3 nanometer. USE - Method for preparing thin-layer oxygen-containing graphdiyne-coated metal composite catalyst. ADVANTAGE - The method uses metal compound is used as a working electrode to carry out electrochemical reduction reaction, under the action of current, part of oxygen functional groups of the thin-layer oxygen-containing graphite alkyne obtain electrons to be reduced, and then the solubility of the thin-layer oxygen-containing graphite alkyne is reduced, and the thin-layer oxygen-containing graphite alkyne is adsorbed on the surface of the electrode (metal compound nanosheet), so that the thin-layer oxygen-containing graphite alkyne-coated metal composite catalyst with excellent catalytic activity and stability is obtained.