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DOI	10.1021/acsaem.9b00091
	Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production
	Yu W.; Yin J.; Li Y.; Lai B.; Jiang T.; Li Y.; Liu H.; Liu J.; Zhao C.; Singh S.C.; Chen J.; Lin B.; Idriss H.; Guo C.
发表日期	2019
ISSN	25740962
起始页码	2751
结束页码	2759
卷号	2 期号:4
英文摘要	H2 production using nanoscale semiconductors via photocatalytic water splitting is a much sought-after technology to curb carbon dioxide emission. Among the many challenges found to date is the search for a stable semiconductor photocatalyst responding to visible and preferably visible and IR light. Ag2S is a narrow bandgap semiconductor with a bulk electronic gap smaller than that needed to split water. In this work, using a solvent thermal strategy, we have increased its bandgap energy by shifting up the conduction band edge to make it suitable for the electron transfer reaction to hydrogen ions. The Ag2S quantum dots (QDs) were tested as both electrocatalysts and photocatalysts. As electrocatalysts, Ag2S QDs with an absorption peak at 800 nm (QD800) showed the highest H2 evolution activity with a Tafel slope of 89 mV/dec with an overpotential of 0.32 V. As photocatalysts, H2 was produced at a rate of 858 μmol h-1 gcatal-1 under a white light flux of 100 mW cm-2. Moreover, QD800 was also found to be active under only near-infrared excitation (800 ± 20 nm). This is the longest wavelength reported so far to excite a semiconductor and generate H2. American Chemical Society.
英文关键词	hydrogen evolution reaction; near-infrared; photocatalysis; quantum dots; silver sulfide
scopus关键词	Carbon dioxide; Electrocatalysts; Energy gap; Global warming; Hydrogen production; Infrared devices; Nanocrystals; Narrow band gap semiconductors; Photocatalysis; Semiconducting silver compounds; Semiconductor quantum dots; Sulfur compounds; Carbon dioxide emissions; Electron-transfer reactions; Hydrogen evolution reactions; Near Infrared; Near-infrared excitation; Photocatalytic water splitting; Semiconductor photocatalyst; Silver sulfides; Silver compounds
来源期刊	ACS Applied Energy Materials
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176443
作者单位	Guo China-US Joint Photonics Laboratory (GPL), State Key Laboratory of Applied Optics (SKLAO), Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences (CAS), Changchun, 130033, China; Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia; SABIC-CRD, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia; Institute of Optics, University of Rochester, Rochester, NY 14627, United States; Department of Journal, Jilin University of Arts, Changchun, 130021, China; Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576, Singapore; State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China; School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China; Department of Chemistry, Unive...
推荐引用方式 GB/T 7714	Yu W.,Yin J.,Li Y.,et al. Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production[J],2019,2(4).
APA	Yu W..,Yin J..,Li Y..,Lai B..,Jiang T..,...&Guo C..(2019).Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production.ACS Applied Energy Materials,2(4).
MLA	Yu W.,et al."Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production".ACS Applied Energy Materials 2.4(2019).