期刊
CARBON
卷 80, 期 -, 页码 591-598出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.09.002
关键词
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资金
- 973 Program of China [2014CB643506, 2013CB922104, 2011CBA00703]
- National Natural Science Foundation of China [201173091, 2110357, 21161160445]
- Fundamental Research Funds for the Central Universities [HUST: CXY12Q022]
- CME
- Program of New Century Excellent Talents in University [NCET-10-0416]
The photocatalytic water splitting into hydrogen and oxygen using solar light is a promising method to provide clean energy carriers in the future. Herein we report on an experimental investigation of TiO2 nanotubes (NTs) modified with electrochemically reduced graphene oxide (ERGO) for photoelectrochemical water splitting. A photocurrent density of 1.44 mA cm(-2) at 1.23 V vs. RHE has been achieved for ERGO-TiO2 NTs photoanode under standard reporting conditions, i.e., simulated AM 1.5G sunlight (intensity 100 mW cm(-2)), which is notably increased by similar to 140% compared to the bare TiO2 NTs. This efficiency is nearly ten times higher than that of the P25 nanoparticles based device. The enhanced photocurrent densities can be attributed to the reduced graphene oxide and Ti3+ self-doping produced by an electrochemical reduction treatment. The ERGO modified photoanodes show excellent stability during light soaking under full sunlight. (C) 2014 Elsevier Ltd. All rights reserved.
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