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. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论