Electrochemical Performance of Cupric Oxide Loaded Carbon Nanotubes as Electrode Material for CO2 Reduction

Abstract

This study is conducted to explore the effective and stable electrode materials for electrochemical reduction of CO2. The different compositions (3 - 8%) CuO-supported CNT samples were prepared by a traditional sol-gel method, and the prepared materials were characterized by TGA, SEM, TEM, FTIR and XRD. The characterization results confirmed the uniform impregnation of CuO on the defects of the CNT's, which improved the utilization of meso and microporous distribution in the prepared electrocatalyst. The high surface area and stability of CuO- CNTs allowed dual conduction of electron and intermediate species with high current density at minimum energy supplied. Linear sweep voltammetry and Chronoamperometry were used to measure the electrode's current density and stability, respectively, and 8 % CuO- CNT was found most stable and progressive composition to reduce the CO2 efficiently. Further, the liquid products were analyzed using the gas chromatography, and 20 % faradic efficiency of methane was measured.

Effect of Explicit Water Molecules on the Electrochemical Hydrogenation of CO2 on Sn(112)

“…There have been many studies on the mechanism of CO 2 reduction on different electrode materials, especially the metal and metal oxide supported electrodes, to pursue an efficient conversion of CO 2 [8][9][10][11][12][13][14][15][16][17][18][19][20]. Most electrochemical reactions are carried out in an aqueous environment, so it is necessary to understand the basic chemical processes of CO 2 electrochemical hydrogenation, including the solvation effect and solvent molecules participating in the chemical transformation.…”