Highly Efficient Water Dissociation on Anatase TiO2(101)

	Highly Efficient Water Dissociation on Anatase TiO2(101)
	Guo, Qing 1; Xu, Chenbiao 1; Yang, Xueming 1; Dai, Dongxu 1; Geng, Zhenhua 1,2; Chen, Xiao 1,2; Yang, Wenshao 1
刊名	Journal of Physical Chemistry C
	2016-12-01
卷号	120 期号:47 页码:26807-26813
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.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
关键词[WOS]	PHOTOCATALYTIC TIO2 SURFACES ; LASER-INDUCED-FLUORESCENCE ; TITANIUM-DIOXIDE ; ADSORBED WATER ; VISIBLE-LIGHT ; TRAPPED HOLES ; O-2 ; PHOTOOXIDATION ; REACTIVITY ; 1ST-PRINCIPLES
收录类别	SCI
语种	英语
WOS记录号	WOS:000389161300023
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/150417]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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
推荐引用方式 GB/T 7714	Guo, Qing,Xu, Chenbiao,Yang, Xueming,et al. Highly Efficient Water Dissociation on Anatase TiO2(101)[J]. Journal of Physical Chemistry C,2016,120(47):26807-26813.
APA	Guo, Qing.,Xu, Chenbiao.,Yang, Xueming.,Dai, Dongxu.,Geng, Zhenhua.,...&Yang, Wenshao.(2016).Highly Efficient Water Dissociation on Anatase TiO2(101).Journal of Physical Chemistry C,120(47),26807-26813.
MLA	Guo, Qing,et al."Highly Efficient Water Dissociation on Anatase TiO2(101)".Journal of Physical Chemistry C 120.47(2016):26807-26813.