Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production
文献类型：期刊论文
| 作者 | W.L.Yu; J.Yin; Y.Li; B.Lai; T.Jiang; Y.Y.Li; H.W.Liu; J.L.Liu |
| 刊名 | Acs Applied Energy Materials
 |
| 出版日期 | 2019 |
| 卷号 | 2期号:4页码:2751-2759 |
| 关键词 | Photocatalysis,hydrogen evolution reaction,silver sulfide,near-infrared,quantum dots,oxygen evolution,facile synthesis,size,electrocatalyst,confinement,reduction,efficient,graphene,mos2,cds,Chemistry,Energy & Fuels,Materials Science |
| ISSN号 | 2574-0962 |
| DOI | 10.1021/acsaem.9b00091 |
| 英文摘要 | H-2 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 H-2 evolution activity with a Tafel slope of 89 mV/dec with an overpotential of 0.32 V. As photocatalysts, H-2 was produced at a rate of 858 mu mol h(-1 )g(catal)(-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 H-2. |
| 语种 | 英语 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/62848]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | W.L.Yu,J.Yin,Y.Li,et al. Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production[J]. Acs Applied Energy Materials,2019,2(4):2751-2759. |
| APA | W.L.Yu.,J.Yin.,Y.Li.,B.Lai.,T.Jiang.,...&J.L.Liu.(2019).Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production.Acs Applied Energy Materials,2(4),2751-2759. |
| MLA | W.L.Yu,et al."Ag2S Quantum Dots as an Infrared Excited Photocatalyst for Hydrogen Production".Acs Applied Energy Materials 2.4(2019):2751-2759. |
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