Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction

doi:10.1021/acsami.8b14571

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	Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction
	Chen, Chih-Jung 3; Liu, Chi-Wei 4,5; Yang, Kai-Chih 1; Yin, Li-Chang 2; Wei, Da-Hua 4,5; Hu, Shu-Fen 1; Liu, Ru-Shi 3,4,5
刊名	ACS APPLIED MATERIALS & INTERFACES
	2018-10-31
卷号	10 期号:43 页码:37142-37149
关键词	water reduction hydrogen evolution reaction co-catalyst P-doped cobalt sulfide Si pyramids
ISSN号	1944-8244
DOI	10.1021/acsami.8b14571
通讯作者	Wei, Da-Hua(dhwei@ntut.edu.tw) ; Hu, Shu-Fen(sfhu.hu@ntnu.edu.tw) ; Liu, Ru-Shi(rsliu@ntu.edu.tw)
英文摘要	Cobalt sulfide (CoSx) functioned as a co-catalyst to accelerate the kinetics of photogenerated electrons on Si photocathode, leading to the enhancement of solar hydrogen evolution efficiency. By doping phosphorus heteroatoms, CoSx materials showed an improved catalytic activity because of superior surface area and quantity of active sites. Furthermore, increased vacancies in unoccupied electronic states were observed, as more phosphorus atoms doped into CoSx co-catalysts. Although these vacant sites improved the capability to accept photoinduced electrons from Si photoabsorber, chemisorption energy of atomic hydrogen on catalysts was the dominant factor affecting in photoelectrochemical performance. We suggested that P-doped CoSx with appropriate doping quantities showed thermoneutral hydrogen adsorption. Excess phosphorus dopants in CoSx contributed to excessively strong adsorption with H atoms, causing the poor desorption ability of photocatalytic reaction. The optimal P-doped CoSx decoratedSi photocathode showed a photocurrent of -20.6 mA cm(-2) at 0 V. Moreover, a TiO2 thin film was deposited on the Si photocathode as a passivation layer for improving the durability. The current density of 10 nm TiO2-modified photocathode remained at approximately -13.3 mA cm(-2) after 1 h of chronoamperometry.
资助项目	Ministry of Science and Technology[MOST 106-2112-M-003-007-MY3] ; Ministry of Science and Technology[MOST 107-2113-M-002-008-MY3] ; National Science Foundation of China[52472249] ; NSFC-GD joint special fund for supercomputer science
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000449239600062
资助机构	Ministry of Science and Technology ; National Science Foundation of China ; NSFC-GD joint special fund for supercomputer science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/130425]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wei, Da-Hua; Hu, Shu-Fen; Liu, Ru-Shi
作者单位	1.Natl Taiwan Normal Univ, Dept Phys, Taipei 11677, Taiwan 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan 4.Natl Taipei Univ Technol, Dept Mech Engn, Taipei 10608, Taiwan 5.Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 10608, Taiwan
推荐引用方式 GB/T 7714	Chen, Chih-Jung,Liu, Chi-Wei,Yang, Kai-Chih,et al. Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(43):37142-37149.
APA	Chen, Chih-Jung.,Liu, Chi-Wei.,Yang, Kai-Chih.,Yin, Li-Chang.,Wei, Da-Hua.,...&Liu, Ru-Shi.(2018).Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction.ACS APPLIED MATERIALS & INTERFACES,10(43),37142-37149.
MLA	Chen, Chih-Jung,et al."Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction".ACS APPLIED MATERIALS & INTERFACES 10.43(2018):37142-37149.