Cobalt Oxide Decorated Zirconium Oxide Immobilized Multiwalled Carbon Nanotubes as Scaffolds for Supercapacitors and the CO2Reduction Reaction

•A bifunctional electrode material, MWCNTs-ZrO2-Co3O4is synthesized and characterized.•Using MWCNTs-ZrO2-Co3O4, an asymmetric supercapacitor is fabricated (MWCNTs-ZrO2-Co3O4//AC).•This device exhibits long-term cyclic stability and high specific energy.•Selective electrocatalytic reduction of CO2selectively to HCOOH is achieved using MWCNTs-ZrO2-Co3O4.