Electron-transfer cascade from CdSe@ZnSe core-shell quantum dot accelerates photoelectrochemical H2 evolution on TiO2 nanotube arrays
文献类型:期刊论文
作者 | Jia, Jia1; Xue, Peng1; Hu, Xiaoyun2; Wang, Yishan3; Liu, Enzhou1,2; Fan, Jun1 |
刊名 | Journal of Catalysis |
出版日期 | 2019-07 |
页码 | 81-94 |
ISSN号 | 00219517;10902694 |
关键词 | Photoelectrochemical H-2 evolution Quantum dots CdSe@ZnSe core-shell TiO2 nanotube arrays |
DOI | 10.1016/j.jcat.2019.05.028 |
产权排序 | 3 |
英文摘要 | A novel TiO2-CdSe-ZnSe electron-transfer cascade heterostructure with nanoscale precision is synthesized for hydrogen evolution, exhibiting an obvious hierarchical absorption and improved separation efficiency for photocarriers. The key to this constructed structure lies in the in-situ deposition of CdSe quantum-dots onto the surface of TiO2 followed by the epitaxial growth of a ZnSe shell. In this conditions, the CdSe core can serve as a buffer layer for the electrons on the conduction band of the ZnSe shell, enabling them to rapidly migrate to the TiO2 and later to the opposite electrode to produce H2; meanwhile, due to high injection efficiency in the cascade type II structure, holes from TiO2 are transferred to the electrolyte interface, where the oxidation reaction of hole trapping scavenger occurs. Surprisingly, this heterostructure shows a significantly enhanced photocurrent density (1.45 mA cm−2), favorable H2 production rates (252 μmol h−1 cm−2) and moderate durability under light irradiation. © 2019 Elsevier Inc. |
语种 | 英语 |
出版者 | Academic Press Inc. |
WOS记录号 | WOS:000486104500009 |
源URL | [http://ir.opt.ac.cn/handle/181661/31555] |
专题 | 西安光学精密机械研究所_瞬态光学技术国家重点实验室 |
通讯作者 | Liu, Enzhou |
作者单位 | 1.School of Chemical Engineering, Northwest University, Xi'an; 710069, China; 2.School of Physics, Northwest University, Xi'an; 710069, China; 3.State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China |
推荐引用方式 GB/T 7714 | Jia, Jia,Xue, Peng,Hu, Xiaoyun,et al. Electron-transfer cascade from CdSe@ZnSe core-shell quantum dot accelerates photoelectrochemical H2 evolution on TiO2 nanotube arrays[J]. Journal of Catalysis,2019:81-94. |
APA | Jia, Jia,Xue, Peng,Hu, Xiaoyun,Wang, Yishan,Liu, Enzhou,&Fan, Jun.(2019).Electron-transfer cascade from CdSe@ZnSe core-shell quantum dot accelerates photoelectrochemical H2 evolution on TiO2 nanotube arrays.Journal of Catalysis,81-94. |
MLA | Jia, Jia,et al."Electron-transfer cascade from CdSe@ZnSe core-shell quantum dot accelerates photoelectrochemical H2 evolution on TiO2 nanotube arrays".Journal of Catalysis (2019):81-94. |
入库方式: OAI收割
来源:西安光学精密机械研究所
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