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学科主题: 物理化学
题名: Photocatalytic Dissociation of Ethanol on TiO2(110) by Near-Band-Gap Excitation
作者: Ma, Zhibo1;  Guo, Qing1;  Mao, Xinchun1;  Ren, Zefeng2;  Wang, Xu1;  Xu, Chenbiao1;  Yang, Wenshao1;  Dai, Dongxu1;  Zhou, Chuanyao1;  Fan, Hongjun1;  Yang, Xueming1
通讯作者: 周传耀 ;  樊红军 ;  杨学明
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2013-05-23
DOI: 10.1021/jp309925x
卷: 117, 期:20, 页:10336-10344
收录类别: SCI
文章类型: Article
部门归属: 11
项目归属: 1102
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Ethanol on TiO2(110) has been studied using the temperature-programmed desorption (TPD), femtosecond two-photon photoemission spectroscopy (2PPE), and density functional theory (DFT) calculations. The first layer of ethanol (binds to Ti-5c) whose molecular state has been predicted to be more stable by DFT desorbs at 295 K. A photoinduced excited state that is associated with bridging hydroxyls has been detected at similar to 2.4 eV above the Fermi level on ethanol/TiO2(110) interface using 2PPE. Detailed TPD studies show that ethanol on Ti-5c can be photocatalytically converted to acetaldehyde by near-band-gap excitation with the hydrogen atoms transfer to bridging-bonded oxygen sites, which is consistent with the 2PPE results. TPD results also show a low-temperature water TPD peak that seems to bind to the Ti-5c sites in addition to the ethylene TPD product. These results suggest that the Ti-5c sites on TiO2(110) are the primary active sites for photocatalysis of ethanol on TiO2(110), while bridging-bonded oxygen sites also play an important role, as in the case of methanol. The kinetics of photocatalyzed ethanol dissociation on TiO2(110) has also been measured using the 2PPE technique, which is of heterogeneous nature.
关键词[WOS]: HYDROGEN-PRODUCTION ;  ALIPHATIC-ALCOHOLS ;  RUTILE TIO2(110) ;  TIO2 110 ;  PHOTOCHEMICAL KINETICS ;  TITANIUM-DIOXIDE ;  WATER FILMS ;  SURFACE ;  METHANOL ;  ADSORPTION
语种: 英语
WOS记录号: WOS:000319649400014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/117667
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, Liaoning, Peoples R China
2.Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

Recommended Citation:
Ma, Zhibo,Guo, Qing,Mao, Xinchun,et al. Photocatalytic Dissociation of Ethanol on TiO2(110) by Near-Band-Gap Excitation[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(20):10336-10344.
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