DICP OpenIR
Subject Area物理化学
Kinetics and Dynamics of Photocatalyzed Dissociation of Ethanol on TiO2(110)
Ma, Zhi-bo; Zhou, Chuan-yao; Mao, Xin-chun; Ren, Ze-feng; Dai, Dong-xu; Yang, Xue-ming; Zhou CY(周传耀); Yang XM(杨学明)
KeywordTwo-photon Photoemission Photocatalysis Tio2 Kinetic Ultrafast Dynamic
Source PublicationCHINESE JOURNAL OF CHEMICAL PHYSICS
2013-02-27
ISSN1674-0068
DOI10.1063/1674-0068/26/01/1-7
Volume26Issue:1Pages:1-7
Indexed BySCI
SubtypeArticle
Department11
Funding Project1102
Contribution Rank1,1
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectPhysics, Atomic, Molecular & Chemical
WOS Research AreaPhysics
WOS KeywordHYDROGEN-PRODUCTION ; SURFACE-CHEMISTRY ; RUTILE TIO2(110) ; TIO2 SURFACES ; DEFECTS ; OXYGEN ; WATER ; PHOTOEMISSION ; ELECTRONS ; SCIENCE
AbstractThe kinetics and dynamics of photocatalyzed dissociation of ethanol on TiO2(110) surface have been studied using the time-dependent and time-resolved femtosecond two-photon photoemission spectroscopy respectively, in order to unravel the photochemical properties of ethanol on this prototypical metal oxide surface. By monitoring the time evolution of the photoinduced excited state which is associated with the photocatalyzed dissociation of ethanol on Ti-5c sites of TiO2(110), the fractal-like kinetics of this surface photocatalytic reaction has been obtained. The measured photocatalytic dissociation rate on reduced TiO2(110) is faster than that on the oxidized surface. This is attributed to the larger defect density on the reduced surface which lowers the reaction barrier of the photocatalytic reaction at least methodologically. Possible reasons associated with the defect electrons for the acceleration have been discussed. By performing the interferometric two-pulse correlation on ethanol/TiO2(110) interface, the ultrafast electron dynamics of the excited state has been measured. The analyzed lifetime (24 fs) of the excited state is similar to that on methanol/TiO2(110). The appearance of the excited state provides a channel to mediate the electron transfer between the TiO2 substrate and its environment. Therefore studying its ultrafast electron dynamics may lead to the understanding of the microscopic mechanism of photocatalysis and photoelectrochemical energy conversion on TiO2.
Language英语
WOS IDWOS:000316093500001
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/117641
Collection中国科学院大连化学物理研究所
Corresponding AuthorZhou CY(周传耀); Yang XM(杨学明)
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Ma, Zhi-bo,Zhou, Chuan-yao,Mao, Xin-chun,et al. Kinetics and Dynamics of Photocatalyzed Dissociation of Ethanol on TiO2(110)[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2013,26(1):1-7.
APA Ma, Zhi-bo.,Zhou, Chuan-yao.,Mao, Xin-chun.,Ren, Ze-feng.,Dai, Dong-xu.,...&杨学明.(2013).Kinetics and Dynamics of Photocatalyzed Dissociation of Ethanol on TiO2(110).CHINESE JOURNAL OF CHEMICAL PHYSICS,26(1),1-7.
MLA Ma, Zhi-bo,et al."Kinetics and Dynamics of Photocatalyzed Dissociation of Ethanol on TiO2(110)".CHINESE JOURNAL OF CHEMICAL PHYSICS 26.1(2013):1-7.
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