Copper-based Metal-Organic-Framework for Electrochemical Carbon Dioxide Reduction

Abstract

Copper has generated variable studies and applications in electrochemical CO2 reduction reaction (CO2RR) due to its difference in product diversity compared with other transition metals. Metal-Organic Frameworks (MOFs) as high-porosity structures have huge potential in many fields, such as energy storage and conversion, UiO-67 is widely used, especially in scenarios where thermal stability and alkaline environments are required. Here this project will induct Cu@UiO-67 and Cu@UiO-bpy could be electrochemical catalysts for CO2RR under alkaline conditions. It investigated the factor of reacting with different copper sources and their reaction durations, and the components of these two-catalyst ink were considered as variables to be studied. Post-synthesis method was employed to construct the guest-encapsulated MOF structure. At the optimum mass ratio of Cu@UiO-67/Cu@UiO-bpy: carbon black 4:1 the Faradaic efficiency of C2+ products were 53.35% and 65.12%, respectively, which was achieved under a large current density of 500 mA/cm2 in the flow cell.