TY - JOUR
T1 - Intrinsically Ru-doped suboxide TiO2nanotubes for enhanced photoelectrocatalytic H2generation
AU - Khorashadizade, Elham
AU - Mohajernia, Shiva
AU - Hejazi, Seyedsina
AU - Mehdipour, Hamid
AU - Naseri, Naimeh
AU - Moradlou, Omran
AU - Moshfegh, Alireza Z.
AU - Schmuki, Patrik
N1 - Funding Information:
The authors would like to acknowledge ERC, DFG, and the Erlangen DFG cluster of excellent for financial support. We are also grateful for financial supports from Research and Technology Council of the Sharif University of Technology and Iran National Science Foundation.
Publisher Copyright:
© 2021 American Chemical Society. All rights reserved.
PY - 2021/3/25
Y1 - 2021/3/25
N2 - In the present research, we investigate the synergistic effects of Ru-doping and Ar/H2 reduction treatment on the photoelectrochemical water splitting performance and hydrogen evolution rate of TiO2 nanotube array photoelectrodes. The Ti-Ru alloy with 0.2 at. % Ru was used to grow anodic self-organized Ru-doped TiO2 nanotube layers. An ideal synergy between Ar/H2 reduction treatment and Ru-doping results in the extended absorption toward the visible light region and improved photoelectrocatalytic activity. The black Ru-doped TiO2-x photoanode's water splitting rate improves remarkably (∼ninefold) compared to the black TiO2-x sample (∼twofold). Moreover, the black Ru-doped TiO2-x photoanode shows a considerable increase in the H2 production rate (1.91 μmol h-1 cm-2) compared with the pristine TiO2 nanotube layer (0.044 μmol h-1 cm-2). We have also developed an ab initio model of pristine, Ru-doped, and Ru-doped hydrogenated TiO2 nanotubes to rationalize our experimental findings from the theoretical perspective.
AB - In the present research, we investigate the synergistic effects of Ru-doping and Ar/H2 reduction treatment on the photoelectrochemical water splitting performance and hydrogen evolution rate of TiO2 nanotube array photoelectrodes. The Ti-Ru alloy with 0.2 at. % Ru was used to grow anodic self-organized Ru-doped TiO2 nanotube layers. An ideal synergy between Ar/H2 reduction treatment and Ru-doping results in the extended absorption toward the visible light region and improved photoelectrocatalytic activity. The black Ru-doped TiO2-x photoanode's water splitting rate improves remarkably (∼ninefold) compared to the black TiO2-x sample (∼twofold). Moreover, the black Ru-doped TiO2-x photoanode shows a considerable increase in the H2 production rate (1.91 μmol h-1 cm-2) compared with the pristine TiO2 nanotube layer (0.044 μmol h-1 cm-2). We have also developed an ab initio model of pristine, Ru-doped, and Ru-doped hydrogenated TiO2 nanotubes to rationalize our experimental findings from the theoretical perspective.
UR - https://www.scopus.com/pages/publications/85103462718
U2 - 10.1021/acs.jpcc.1c00459
DO - 10.1021/acs.jpcc.1c00459
M3 - Article
AN - SCOPUS:85103462718
SN - 1932-7447
VL - 125
SP - 6116
EP - 6127
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 11
ER -
SDG 7 Affordable and Clean Energy