Electron Transfer-Induced Dynamics of Oxygen Molecules on the$TiO_2(110)$Surface

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 O2molecules...

Full description

Saved in:
Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2004-01, Vol.303 (5657), p.511-513
Main Authors: Wahlström, Erik, Vestergaard, Ebbe Kruse, Schaub, Renald, Rønnau, Anders, Vestergaard, Majken, Lægsgaard, Erik, Stensgaard, Ivan, Besenbacher, Flemming
Format: Article
Language:English
Subjects:
Atoms
Conduction bands
Electrons
Materials
Metal oxides
Molecules
Oxidation
Oxides
Oxygen
Transition metals
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 O2molecules adsorbed on a rutile$TiO_2(110)$surface. The O2hopping 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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1093425