| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2024
|
| Presentation Title |
A-25: Synthesis of Ti−Nb−Ta−Zr−O Nanotubes Array by Anodization and Its Application for Photoelectrochemical Water Splitting |
| Author(s) |
Chun-Yi Chen, Yi-Hsuan Chiu, Tso-Fu Mark Chang, Masato Sone, Yung-Jung Hsu |
| On-Site Speaker (Planned) |
Chun-Yi Chen |
| Abstract Scope |
By performing electrochemical anodization on Ti29Nb13Ta4.6Zr alloys at 20V in NH4F-containing (0.3 wt %) ethylene glycol electrolyte, quaternary Ti-Nb-Ta-Zr-O (TNTZO) mixed-oxide nanotubes arrays with controllable geometric features were prepared. Compared with pristine TiO2, the TNTZO photoanodes exhibited noticeably enhanced photoactivity toward solar water splitting. The analytic results of time-resolved photoluminescence, electrochemical impedance, and open-circuit voltage decay measurements manifest that the superior photoactivity of TNTZO originated from the introduction of Nd, Ta, and Zr elements, which enhanced the number of accessible charge carriers, modified the electronic structure, and improved the hole-transfer kinetics for expediting water splitting. Furthermore, reducing the water content of the electrolyte to 0.9 vol % generated TNTZO nanotubes that can be fully depleted during photoelectrochemical water splitting operations, which may serve as a versatile structural backbone to construct a sophisticated photoelectrode paradigm. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Nanotechnology, Energy Conversion and Storage |