[PS-6-06] NiO/GaN Composite Films as Photoelectrodes for Photoelectrochemical Hydrogen Generation and CO2 Reduction in NaCl Aqueous Electrolyte
This study produced hydrogen gas and formic acid simultaneously through water photoelectrolysis and CO2 reduction, respectively, in the photoelectrochemical (PEC) reactions. The PEC reactions used GaN films with a NiO coating layer as photoelectrodes. The study explored the mechanism of the NiO layer functioning as a catalyst and/or protective layer. Additionally, it explored the effect of the thickness of the NiO layer on the performance of the GaN photoelectrodes. The study also noted that using CO2-containing NaCl aqueous solution as an electrolyte will open a window for using seawater for future PEC reactions.