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Photoelectrocatalytic reduction of carbon dioxide to solar fuel exists as a novel approach for addressing energy demand, and environmental concerns due to high efficiency and less energy requirement as compared to other technology. The predominant goal of the current work is to investigate the impact of metal oxide (NiO &amp; CuO) supported photoanodes for enhancing CO 2  conversion into solar fuel using a photoelectrochemical cell (PEC). The photoanodes were incorporated with rGO with combinations of metal oxide nanocomposites and coated on the electrode surface. The PEC consists of anode and cathode compartments divided by proton exchange membrane, the anode and cathode are filled with 0.1 M KOH and 0.5 M KCl respectively. The xenon arc lamp (100W) is used as a light source and carbon dioxide is supplied with a flow rate of 10 mL/min. The synthesized nanoparticles were characterized using XRD, FTIR, and Cyclic Voltammetry. The experimental results showed that the NiO-coated photoanode observed the better performance than CuO coated electrode and it had achieved the maximum solar fuel (Formic Acid) production rate of 9.223 μmol/hr/cm 2  with a Faradic efficiency of 14.83% as compared to the control electrode.

NiO & CuO nanocomposites coated photoanode for conversion of CO 2 into solar fuel using photoelectrochemical cell