Two-Dimensional Morphology Enhances Light-Driven H-2 Generation Efficiency in CdS Nanoplatelet-Pt Heterostructures
文献类型：期刊论文
| 作者 | McBride, James R.1; Yu, Li3; Lian, Tianquan3; Li, Qiuyang3; Zhao, Fengjiao2; Qu, Chen3; Shang, Qiongyi3; Xu, Zihao3 |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2018-09-19 |
| 卷号 | 140期号:37页码:11726-11734 |
| ISSN号 | 0002-7863 |
| DOI | 10.1021/jacs.8b06100 |
| 通讯作者 | Lian, Tianquan(tlian@emory.edu) |
| 英文摘要 | Light-driven H-2 generation using semiconductor nanocrystal heterostructures has attracted intense recent interest because of the ability to rationally improve their performance by tailoring their size, composition, and morphology. In zero- and one-dimensional nanomaterials, the lifetime of the photoinduced charge-separated state is still too short for H-2 evolution reaction, limiting the solar-to-H-2 conversion efficiency. Here we report that using two-dimensional (2D) CdS nanoplatelet (NPL)-Pt heterostructures, H-2 generation internal quantum efficiency (IQE) can exceed 40% at pH 8.8-13 and approach unity at pH 14.7. The near unity IQE at pH 14.7 is similar to those reported for 1D nanorods and can be attributed to the irreversible hole removal by OH-. At pH < 13, the IQE of 2D NPL-Pt is significantly higher than those in 1D nanorods. Detailed time-resolved spectroscopic studies and modeling of the elementary charge separation and recombination processes show that, compared to 1D nanorods, 2D morphology extends charge-separated state lifetime and may play a dominant role in enhancing the H-2 generation efficiency. This work provides a new approach for designing nanostructures for efficient light-driven H-2 generation. |
| WOS关键词 | PHOTOCATALYTIC HYDROGEN GENERATION ; EXCITON LOCALIZATION EFFICIENCY ; QUANTUM DOTS ; SEMICONDUCTOR NANOCRYSTALS ; NANOROD HETEROSTRUCTURES ; ELECTRON-TRANSFER ; CARBONYL-COMPOUNDS ; CHARGE SEPARATION ; DISSOCIATION ; RECOMBINATION |
| 资助项目 | U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program[DE-FG02-12ER16347] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000445439700029 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Solar Photochemistry Program |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/167044]  |
| 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 | Lian, Tianquan |
| 作者单位 | 1.Vanderbilt Univ, Dept Chem, Vanderbilt Inst Nanoscale Sci & Engn, Box 1583, Nashville, TN 37235 USA 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China 3.Emory Univ, Dept Chem, 1515 Dickey Dr Northeast, Atlanta, GA 30322 USA |
| 推荐引用方式 GB/T 7714 | McBride, James R.,Yu, Li,Lian, Tianquan,et al. Two-Dimensional Morphology Enhances Light-Driven H-2 Generation Efficiency in CdS Nanoplatelet-Pt Heterostructures[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2018,140(37):11726-11734. |
| APA | McBride, James R..,Yu, Li.,Lian, Tianquan.,Li, Qiuyang.,Zhao, Fengjiao.,...&Xu, Zihao.(2018).Two-Dimensional Morphology Enhances Light-Driven H-2 Generation Efficiency in CdS Nanoplatelet-Pt Heterostructures.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,140(37),11726-11734. |
| MLA | McBride, James R.,et al."Two-Dimensional Morphology Enhances Light-Driven H-2 Generation Efficiency in CdS Nanoplatelet-Pt Heterostructures".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 140.37(2018):11726-11734. |
入库方式： OAI收割
来源：大连化学物理研究所
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