Experimental evidence for mixed dissociative and molecular adsorption of water on a rutile TiO2(110) surface without oxygen vacancies

被引：109

作者：

Walle, L. E. ^{[2
]}

Borg, A. ^{[2
]}

Uvdal, P. ^{[3
,4
]}

Sandell, A. ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Mat Sci, SE-75121 Uppsala, Sweden

[2] Norwegian Univ Sci & Technol NTNU, Dept Phys, NO-7491 Trondheim, Norway

[3] Lund Univ, Dept Chem, SE-22100 Lund, Sweden

[4] Lund Univ, Max Lab, SE-22100 Lund, Sweden

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 23期

关键词：

adsorption; dissociation; photoemission; synchrotron radiation; titanium compounds; water; SCANNING-TUNNELING-MICROSCOPY; H2O; 1ST-PRINCIPLES; DEFECTS; TIO2; SIMULATION; SITES; DFT; STM; O-2;

D O I：

10.1103/PhysRevB.80.235436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present evidence for mixed molecular and dissociative water adsorption at monolayer coverage on a rutile TiO2(110) surface free from oxygen vacancies using synchrotron radiation photoemission. At monolayer coverage the OH:H2O ratio is close to 0.5 and reducing the coverage by heating yields an increased OH:H2O ratio. At room temperature neither species originating from the monolayer on the defect-free surface can be detected. The OH species of the monolayer hence recombines and leaves the surface at much lower temperatures than OH formed by water dissociation on oxygen vacancies.

引用

页数：5

共 37 条

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