▎ 摘　　要

NOVELTY - Graphene aerogel working electrode material comprises graphene aerogel and nano cuprous oxide powder supported on graphene aerogel, where the graphene aerogel is a three-dimensional porous doped CNT graphene aerogel material, and prepared by using graphene oxide and carbon nanotubes as raw materials. USE - The working electrode material/working electrode is useful for electrocatalytic reduction of carbon dioxide. ADVANTAGE - The method: improves the stability of the catalyst; is stable and simple; is easy to operate and has better application prospects. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for : (1) preparing graphene aerogel working electrode material comprising loading nano cuprous oxide powder on graphene aerogel; (2) graphene aerogel working electrode comprising electrode substrate and the graphene aerogel working electrode material, where the graphene aerogel working electrode material is attached to the surface of the electrode substrate, preferably, the electrode substrate is carbon paper or carbon nanotube sponge, the specifications of the carbon paper and the carbon nanotube sponge are any one of 1x 1 cm, 1x 1.5 cm, 1.5x 1.5 cm, 1.5x 2 cm and 2x 2 cm, where the carbon nanotube sponge is a sponge-type carbon nanotube macroscopic body formed by self-assembly of multi-wall carbon nanotubes, and has a thickness of 1-4 mm; (3) preparing a graphene aerogel working electrode comprising coating the dispersed suspension of the nano cuprous oxide powder and the graphene aerogel on the surface of the electrode substrate, preferably, coating an electrode substrate with the dispersion suspension, preferably by an infrared lamp; and (4) electrocatalytic reduction of carbon dioxide comprising using the graphene aerogel working electrode as a cathode electrode for electrocatalytic reduction of carbon dioxide, using a double-chamber electrolytic cell is used, an external voltage, using aqueous potassium bicarbonate solution as the electrolyte solution, using an H-type double-chamber electrolytic cell, separating by a Sulfonated tetrafluoroethylene based fluoropolymer-copolymer proton exchange membrane in the middle, allowing to pass hydrogen to pass through, the counter electrode is a platinum mesh, the reference electrode is silver/silver chloride, providing the voltage by the AUTOLAB electrochemical workstation, the electrolyte solution is 0.1-0.5 mol/l potassium bicarbonate solution, during the electrocatalysis process, continuously feeding H-type double-chamber electrolytic cell with carbon dioxide gas, feeding carbon dioxide gas into the electrolyte before the reaction proceeds 30-60 minutes, preferably, in the electrocatalytic reduction of carbon dioxide system, the electrode holder adopts a glassy carbon substrate electrode holder.