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ABSTRACT
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 & CuO) supported photoanodes for enhancing CO2 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/cm2 with a Faradic efficiency of 14.83% as compared to the control electrode.
Summary of units used
| Units | = | Abbreviation |
| ppm | = | parts per million |
| ml | = | milli liter |
| M | = | Molarity |
| oC | = | Degree Celsius |
| hrs | = | Hours |
| g | = | gram |
| mins | = | Minutes |
| ° | = | Degrees |
| A | = | Ampere |
| mmol | = | milli moles |
| µmol/hr | = | micro mole per hour |
| µmol/lit | = | micro mole per liter |
| N | = | Normality |
| g/l | = | gram per liter |
| % | = | percentage |
| cm2 | = | square centimeter |
| W | = | Watt |
| mL/min | = | milli liter per minute |
| V | = | Volt |
| mV/s | = | milli volt per second |
| nm | = | nanometer |
| cm−1 | = | per centimeter |
| µmol/hr/cm2 | = | micro mole per hour per square centimeter |
| mmol/hr/cm2 | = | mmol per hour per square centimeter |
Disclosure statement
No potential conflict of interest was reported by the author(s).
Additional information
Notes on contributors
Tushar Kudchikar
Tushar Kudchikar received his M.Tech degree from the National Insitute of Technology, Tiruchirappalli, India. His research interests are in Photoelectrochemical cell.
Samsudeen Naina Mohamed
Samsudeen Naina Mohamed is an Associate Professor at the National Institute of Technology, Tiruchirappalli, India. His research interests are Microbial Fuel cells, wastewater treatment, biofuel production and Electrochemical Engineering etc.
Priya Dharshini Palanivel
Priya Dharshini Palanivel is a Research Scholar at the National Institute of Technology, Tiruchirappalli, India. Her research interests are in Bioelectrochemical systems and Renewable energy production