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题名: Characterization of the Excited State on Methanol/TiO2(110) Interface
作者: Wang, Zhi-qiang1;  Hao, Qun-qing1;  Mao, Xin-chun1;  Zhou, Chuan-yao1;  Ma, Zhi-bo1;  Ren, Ze-feng2, 3, 4;  Dai, Dong-xu1;  Yang, Xue-ming1
关键词: Titanium dioxide ;  Excited states ;  Two-photon photoemission ;  Time-resolved
刊名: CHINESE JOURNAL OF CHEMICAL PHYSICS
发表日期: 2015-04-01
DOI: 10.1063/1674-0068/28/cjcp1412212
卷: 28, 期:2, 页:123-127
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: The electronic structure of methanol/TiO2(110) interface has been studied by photoeraission spectroscopy. The pronounced resonance which appears at 5.5 eV above the Fermi level in two-photon photoemission spectroscopy (2PPE) is associated with the photocatalyzed dissociation of methanol at fivefold coordinated Ti sites (Ti-5c) on TiO2(110) surface [Chemical Science 1, 575 (2010)]. To check whether this resonance signal arises from initial or intermediate states, photon energy dependent 2PPE and comparison between one-photon photoemission spectroscopy and 2PPE have been performed. Both results consistently suggest the resonance signal originates from the initially unoccupied intermediate states, i.e., excited states. Dispersion measurements suggest the excited state is localized. Time-resolved studies show the lifetime of the excited state is 24 fs. This work presents comprehensive characterization of the excited states on methanol/TiO2(110) interface, and provides elaborate experimental data for the development of theoretical methods in reproducing the excited states on TiO2 surfaces and interfaces.
关键词[WOS]: SEMICONDUCTOR PHOTOCATALYSIS ;  TITANIUM-DIOXIDE ;  INVERSE-PHOTOEMISSION ;  ELECTRON DYNAMICS ;  TIO2(110) SURFACE ;  WATER ;  SPECTROSCOPY ;  METHANOL ;  TIO2
语种: 英语
WOS记录号: WOS:000354757300001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146239
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
3.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
4.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

Recommended Citation:
Wang, Zhi-qiang,Hao, Qun-qing,Mao, Xin-chun,et al. Characterization of the Excited State on Methanol/TiO2(110) Interface[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2015,28(2):123-127.
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