Synthesis of n-type Cu-doped ZnO Nanorods onto FTO by Electrodeposition Method and Study its Electrocatalytic Properties toward CO2 Reduction

n-type Copper-doped zinc oxide nanorods (CZO NRs) were electrodeposited on fluorine-doped tin oxide (FTO) substrates at low temperature. Nanorod array morphology with wurtzite hexagonal structure was characterized by SEM and XRD. XRD patterns show CZO NRs growth along c-axis perpendicular to the plane of the glass substrate and Cu2+ ions substituted with Zn2+ ions and did not change the hexagonal wurtzite structure of the ZnO nanorods. EDX spectra show the presence of Cu in the sample. UV-Vis spectra indicate optical band gap of ZnO narrow by Cu doping. Mott-Schottky analysis reveals that prepared CZO NRs has n-type conductivity. Voltammetry analysis shows CZO NRs have the electrocatalytic activity toward CO2 reduction at