期刊
NANOSCALE RESEARCH LETTERS
卷 8, 期 -, 页码 -出版社
SPRINGEROPEN
DOI: 10.1186/1556-276X-8-391
关键词
TiO2 nanotubes; Electrochemical reductive doping; Hydrogenation; Photoelectrochemical water splitting
资金
- National Natural Science Foundation of China [61171043, 51077072, 11174308, 51102271]
- Shell Global Solutions International B.V. [PT31045]
- Natural Science Foundation of Shanghai [11ZR1436300]
- Shanghai Municipal Human Resources and Social Security Bureau [2011033]
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/cm(2) in comparison with that of pristine ATO nanotubes (0.29 mA/cm(2)) 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.
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