NiO/GaN Composite Films as Photoelectrodes for Photoelectrochemical Hydrogen Generation and CO<sub>2</sub> Reduction in NaCl Aqueous Electrolyte

Ching-Ying Sheu

13:40 〜 13:42

[SO-PS-06-06] NiO/GaN Composite Films as Photoelectrodes for Photoelectrochemical Hydrogen Generation and CO₂ Reduction in NaCl Aqueous Electrolyte

^○Ching-Ying Sheu¹, Shih-Sian Tu², Shoou-Jinn Chang² (1. National Tainan Girl’s Senior High School (Taiwan), 2. National Cheng Kung University (Taiwan))

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.

2023 International Conference on Solid State Devices and Materials

[SO-PS-06-06] NiO/GaN Composite Films as Photoelectrodes for Photoelectrochemical Hydrogen Generation and CO2 Reduction in NaCl Aqueous Electrolyte

[SO-PS-06-06] NiO/GaN Composite Films as Photoelectrodes for Photoelectrochemical Hydrogen Generation and CO₂ Reduction in NaCl Aqueous Electrolyte