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题名: Highly Efficient Water Dissociation on Anatase TiO2(101)
作者: Geng, Zhenhua1, 2;  Chen, Xiao1, 2;  Yang, Wenshao1;  Guo, Qing1;  Xu, Chenbiao1;  Dai, Dongxu1;  Yang, Xueming1
刊名: Journal of Physical Chemistry C
发表日期: 2016-12-01
DOI: 10.1021/acs.jpcc.6b07774
卷: 120, 期:47, 页:26807-26813
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
英文摘要: Photoinduced water dissociation on anatase-TiO2(101) has been investigated using a laser surface photolysis technique, in combination with temperature programmed desorption and time-of-flight methods. Gaseous OH radicals have been clearly detected by the time-of-flight method during laser irradiation. Further result reveals that the water dissociation reaction occurs most likely via transferring a H atom to a two coordinated oxygen site nearby and ejecting an OH radical to the gas phase. As the water coverage increases, the yield of the water dissociation reaction is also enhanced, whereas the dissociation probability of water is nearly the same at different water coverages. In comparison with water dissociation on rutile-TiO2(110) where the dissociation probability of water is largely inhibited by the strong hydrogen bonds at high water coverage, the reaction on anatase-TiO2(101) is considerably more efficient at high water coverage, which is most likely due to the much weaker interaction between water molecules on the surface. This provides an important clue that strong hydrogen bond interaction should be avoided on a good photocatalyst for water dissociation.
关键词[WOS]: PHOTOCATALYTIC TIO2 SURFACES ;  LASER-INDUCED-FLUORESCENCE ;  TITANIUM-DIOXIDE ;  ADSORBED WATER ;  VISIBLE-LIGHT ;  TRAPPED HOLES ;  O-2 ;  PHOTOOXIDATION ;  REACTIVITY ;  1ST-PRINCIPLES
语种: 英语
WOS记录号: WOS:000389161300023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150417
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.Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China

Recommended Citation:
Geng, Zhenhua,Chen, Xiao,Yang, Wenshao,et al. Highly Efficient Water Dissociation on Anatase TiO2(101)[J]. Journal of Physical Chemistry C,2016,120(47):26807-26813.
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