Scalable Low-Band-Gap Sb2Se3 Thin-Film Photocathodes for Efficient Visible-Near-Infrared Solar Hydrogen Evolution

doi:10.1021/acsnano.7b07512

	Scalable Low-Band-Gap Sb2Se3 Thin-Film Photocathodes for Efficient Visible-Near-Infrared Solar Hydrogen Evolution
	Zhen, Zhen 1; Zhang, Fuxiang 4; Li, Changli 1; Chen, Qiao 1; Zhong, Miao 3; Jiang, Xin 1; Zhu, Hongwei 1; Zhang, Li 1; Li, Yanbo 2
刊名	ACS NANO
	2017-12-01
卷号	11 期号:12 页码:12753-12763
关键词	Antimony Selenide Photocatalysis Surface Modification Thin Films Water Splitting
ISSN号	1936-0851
DOI	10.1021/acsnano.7b07512
文献子类	Article
英文摘要	A highly efficient low-band-gap (1.2-0.8 eV) photoelectrode is critical for accomplishing efficient conversion of visible-near-infrared sunlight into storable hydrogen. Herein, we report an Sb2Se3 polycrystalline thin-film photocathode having a low band gap (1.2-1.1 eV) for efficient hydrogen evolution for wide solar-spectrum utilization. The photocathode was fabricated by a facile thermal evaporation of a single Sb2Se3 powder source onto the Mo-coated soda-lime glass substrate, followed by annealing under Se vapor and surface modification with an antiphotocorrosive CdS/TiO2 bilayer and Pt catalyst. The fabricated Sb2Se3(Se-annealed)/CdS/TiO2/Pt photocathode achieves a photocurrent density of ca. 8.6 mA cm(-2) at 0 V-RHE, an onset potential of ca. 0.43 V-RHE, a stable photocurrent for over 10 h, and a significant photoresponse up to the near-infrared region (ca. 1040 nm) in near-neutral pH buffered solution (pH 6.5) under AM 1.5G simulated sunlight. The obtained photoelectrochemical performance is attributed to the reliable synthesis of a micrometer-sized Sb2Se3 (Se-annealed) thin film as photoabsorber and the successful construction of an appropriate p-n heterojunction at the electrode liquid interface for effective charge separation. The demonstration of a low-band-gap and high-performance Sb2Se3 photocathode with facile fabrication might facilitate the development of cost-effective PEC devices for wide solar spectrum utilization.
WOS关键词	ENHANCED WATER OXIDATION ; SIMULATED SUNLIGHT ; ENERGY-CONVERSION ; PARTICLE TRANSFER ; GRAIN-BOUNDARIES ; ATOMIC LAYER ; PHOTOANODES ; CELLS ; CATALYST ; TIO2
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000418990200105
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169178]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Zhu, Hongwei
作者单位	1.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China 2.Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China 3.Univ Toronto, Dept Elect & Comp Engn, 35 St George St, Toronto, ON M5S 1A4, Canada 4.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis,iChEM, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhen, Zhen,Zhang, Fuxiang,Li, Changli,et al. Scalable Low-Band-Gap Sb2Se3 Thin-Film Photocathodes for Efficient Visible-Near-Infrared Solar Hydrogen Evolution[J]. ACS NANO,2017,11(12):12753-12763.
APA	Zhen, Zhen.,Zhang, Fuxiang.,Li, Changli.,Chen, Qiao.,Zhong, Miao.,...&Li, Yanbo.(2017).Scalable Low-Band-Gap Sb2Se3 Thin-Film Photocathodes for Efficient Visible-Near-Infrared Solar Hydrogen Evolution.ACS NANO,11(12),12753-12763.
MLA	Zhen, Zhen,et al."Scalable Low-Band-Gap Sb2Se3 Thin-Film Photocathodes for Efficient Visible-Near-Infrared Solar Hydrogen Evolution".ACS NANO 11.12(2017):12753-12763.