Effective silicon nanowire arrays/WO3core/shell photoelectrode for neutral pH water splitting

CORC > 沈阳自动化研究所 > 中国科学院沈阳自动化研究所 > 广州中国科学院沈阳自动化研究所分所

	Effective silicon nanowire arrays/WO3core/shell photoelectrode for neutral pH water splitting
	Liu, Jun-Ming ; Chen, Zhen ; Ning, Minghui ; Ma, Ge ; Meng QG(孟庆国); Zhou, Guofu ; Zhang, Yongguang ; Wang, Xin ; Yuan MZ(苑明哲); Chen ZH(陈志鸿)
刊名	Nanotechnology
	2017
卷号	28 期号:27 页码:1-9
关键词	water splitting photoelectrochemical cells SiNWs/WO3 core/shell nanostructures
ISSN号	0957-4484
通讯作者	Chen ZH(陈志鸿)
产权排序	4
中文摘要	We report the first demonstration of a high-efficiency photoelectrochemical (PEC) water splitting reaction using a novel Si NWs/WO3core/shell photoanode prepared by a mild and inexpensive metal-catalyzed electroless etching process followed by dip-coating, airing and annealing methods. The dense and vertically aligned Si NWs/WO3core/shell nanostructure were characterized by scanning electron microscopy, transmission electron microscopy and x-ray diffraction. In comparison to planar n-Si, Si NWs and planar Si/WO3, the Si NWs/WO3samples showed significantly enhanced photocurrent over the entire potential sweep range. More significantly, the Si NWs/WO3samples have an exceptionally low photocurrent onset potential of -0.6393 V versus reversible hydrogen electrode (RHE), indicating very efficient charge separation and charge transportation processes. The as-prepared electrode also has a photocurrent density of 2.7 mA cm-2at 0.6107 V versus RHE in 0.5 M Na2SO4solution under simulated solar light irradiation (100 mW cm-2from 300 W Xenon lamp coupled with an AM 1.5 G filter). An optimal solar-to-hydrogen efficiency of about 1.9% was achieved at 0.2676 V versus RHE. Electrochemical impedance spectroscopy was conducted to investigate the properties of the charge transfer process, and the results indicated that the enhanced PEC performance may due to the increased charge separation. The x-ray photoelectron spectroscopy measurements indicated the chemical composition of the Si NWs/WO3nanostructure. Our work has provided an efficient strategy to improve the energy conversion efficiency and photocurrent of water splitting materials.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]	Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]	HYDROGEN-PRODUCTION ; VISIBLE-LIGHT ; HETEROJUNCTION FILMS ; NANOROD ARRAYS ; EFFICIENT ; NANOPARTICLES ; PERFORMANCE ; OXIDE ; SI ; NANOSTRUCTURES
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000403587900001
内容类型	期刊论文
源URL	[http://ir.sia.cn/handle/173321/20721]
专题	沈阳自动化研究所_广州中国科学院沈阳自动化研究所分所
作者单位	1.Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China 2.Shenyang Institute of Automation, Chinese Academy of Sciences, Guangzhou, Guangzhou, 511458, China 3.International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong Province, China 4.Institute of Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangdong Province, Guangzhou, China 5.Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangdong Province, Guangzhou, China
推荐引用方式 GB/T 7714	Liu, Jun-Ming,Chen, Zhen,Ning, Minghui,et al. Effective silicon nanowire arrays/WO3core/shell photoelectrode for neutral pH water splitting[J]. Nanotechnology,2017,28(27):1-9.
APA	Liu, Jun-Ming.,Chen, Zhen.,Ning, Minghui.,Ma, Ge.,Meng QG.,...&Gao, Jinwei.(2017).Effective silicon nanowire arrays/WO3core/shell photoelectrode for neutral pH water splitting.Nanotechnology,28(27),1-9.
MLA	Liu, Jun-Ming,et al."Effective silicon nanowire arrays/WO3core/shell photoelectrode for neutral pH water splitting".Nanotechnology 28.27(2017):1-9.