Electron transfer-induced dynamics of oxygen molecules on the TiO2(110) surface

被引：172

作者：

Wahlström, E

Vestergaard, EK

Schaub, R

Ronnau, A

Vestergaard, M

Lægsgaard, E

Stensgaard, I

Besenbacher, F ^{[1
]}

机构：

[1] Aarhus Univ, Ctr Atom Scale Mat Phys, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus C, Denmark

[2] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

来源：

SCIENCE | 2004年 / 303卷 / 5657期

关键词：

D O I：

10.1126/science.1093425

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Diffusion of oxygen molecules on transition metal oxide surfaces plays a vital role for the understanding of catalysis and photocatalysis on these materials. By means of time-resolved scanning tunneling microscopy, we provide evidence for a charge transfer-induced diffusion mechanism for O-2 molecules adsorbed on a rutile TiO2(110) surface. The O-2 hopping rate depended on the number of surface donors (oxygen vacancies), which determines the density of conduction band electrons. These results may have implications for the understanding of oxidation processes on metal oxides in general.

引用

页码：511 / 513

页数：3

共 21 条

[1]

Ashcroft N.W., 1976, Solid State Physics

[2] Scanning tunnelling microscopy studies of metal surfaces [J].