期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 87, 期 -, 页码 13-17出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.12.010
关键词
Water splitting; Si nanowires; Graphite-like carbon nitride; Core/shell nanostructure; Copolymerization modification
资金
- NSFC [51602111, 51561135014, U1501244]
- National Key R&D Program of China [2016YFB0401502]
- Guangdong Provincial Grant [2015A030310196, 2014B090915005, 2015B090913004]
- Pearl River S&T Nova Program of Guangzhou [201506040045]
- CAS Hundred Talent Program
- Nansha International S&T Cooperation Program [2016GJ005]
- Guangdong Provincial Science and Technology Project [2017A050506009]
- LOIT [2017B030301007]
- MOE International Laboratory for Optical Information Technologies
- 111 Project
Si nanowires (SiNWs) and graphite-like carbon nitride (g-C3N4) are highly promising materials for solar water splitting. In this work, n-type SiNWs (n-SiNWs) are obtained via metal-catalyzed electroless etching. To improve the photoelectrochemical performance of the n-SiNWs, g-C3N4 is deposited on their surface as a coating layer (n-SiNW/g-C3N4). Furthermore, to increase the density of active sites in g-C3N4, barbituric acid (BA) is introduced into precursors before the layer deposition. The n-SiNW/g-C3N4 photoanode shows a negative shift of the onset potential as compared to the bare n-SiNWs. Moreover, a 50% enhancement in the photocurrent density at 1.6 V vs. RHE is achieved on the BA-modified n-SiNW/g-C3N4 as compared to the pristine n-SiNW/g-C3N4.
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