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