Electrochemically hydrogenated TiO2 nanotubes with improved photoelectrochemical water splitting performance
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- 作者：Chen Xu (1) (2)
Ye Song (1)
Linfeng Lu (2)
Chuanwei Cheng (3)
Dongfang Liu (2)
Xiaohong Fang (2)
Xiaoyuan Chen (2)
Xufei Zhu (1)
Dongdong Li (2) - 关键词：TiO2 nanotubes ; Electrochemical reductive doping ; Hydrogenation ; Photoelectrochemical water splitting
- 刊名：Nanoscale Research Letters
- 出版年：2013
- 出版时间：December 2013
- 年：2013
- 卷：8
- 期：1
- 全文大小：466 KB
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Ye Song (1)
Linfeng Lu (2)
Chuanwei Cheng (3)
Dongfang Liu (2)
Xiaohong Fang (2)
Xiaoyuan Chen (2)
Xufei Zhu (1)
Dongdong Li (2)
1. Key Laboratory of Soft Chemistry and Functional Materials of Education Ministry, Nanjing University of Science and Technology, Nanjing, 210094, China
2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, 99 Haike Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai, 201210, China
3. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology & School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China - ISSN：1556-276X
文摘
One-dimensional anodic titanium oxide (ATO) nanotube arrays hold great potential as photoanode for photoelectrochemical (PEC) water splitting. In this work, we report a facile and eco-friendly electrochemical hydrogenation method to modify the electronic and PEC properties of ATO nanotube films. The hydrogenated ATO (ATO-H) electrodes present a significantly improved photocurrent of 0.65 mA/cm2 in comparison with that of pristine ATO nanotubes (0.29 mA/cm2) recorded under air mass 1.5 global illumination. The incident photon-to-current efficiency measurement suggests that the enhanced photocurrent of ATO-H nanotubes is mainly ascribed to the improved photoactivity in the UV region. We propose that the electrochemical hydrogenation induced surface oxygen vacancies contribute to the substantially enhanced electrical conductivity and photoactivity.