Tube length optimization of titania nanotube array for efficient photoelectrochemical water splitting

January 31, 2023

Title

Tube length optimization of titania nanotube array for efficient photoelectrochemical water splitting

Author

Kazuki Inoue, Atsunori Matsuda & Go Kawamura

Year

2022

Journal

Scientific Reports

Abstract

Anodic TiO2 nanotube arrays (TNTAs) have attracted much attention due to their excellent photoelectrochemical (PEC) properties. In this work, the tube length of TNTAs was optimized for efficient PEC water splitting under two different conditions, in which very few or a massive amount of gas bubbles were generated on the electrodes. As a result, relatively longer TNTAs were found to be preferable for higher PEC performance when a larger number of bubbles were generated. This suggests that the mass transport in the electrolyte is assisted by the generated bubbles, so that the electrode surfaces are more easily exposed to the fresh electrolyte, leading to the higher PEC performance.

Instrument

NRS-4500

Keywords

Titania nanotube array, photoelectrochemical