▎ 摘　　要

NOVELTY - Composite electrode material comprises graphene, cobalt dioxide and iron oxide in a mass ratio of 1:4-6:4.6. USE - Composite electrode material of high-efficiency electrochemical reduction carbon dioxide as formic acid is useful in electrochemical synthesis method and application. ADVANTAGE - The composite electrode material has high specific surface area, high chemical stability and high adsorption performance graphene by three-dimensional electrode electrolytic groove, synergistic electrode negative electrode efficient electric reduction of carbon dioxide in water, and high efficiency electrochemical reduced carbon dioxide as formic acid. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a synthetic method of composite electrode material of high-efficiency electrochemical reducing carbon dioxide as formic acid. DESCRIPTION OF DRAWING(S) - The drawing shows a structural schematic diagram of the three-dimensional electrode of the efficient electrochemical reduction carbon dioxide of the present invention is formic acid. (Drawing includes non-English language text).