Electron Transfer-Induced Dynamics of Oxygen Molecules on the TiO 2 (110) Surface
- 23 January 2004
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 303 (5657) , 511-513
- https://doi.org/10.1126/science.1093425
Abstract
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 O2 molecules adsorbed on a rutile TiO2(110) surface. The O2 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.Keywords
This publication has 15 references indexed in Scilit:
- Kinetics of the photocatalytic water-splitting reaction on TiO2 and Pt/TiO2 studied by time-resolved infrared absorption spectroscopyJournal of Molecular Catalysis A: Chemical, 2003
- Oxygen-Mediated Diffusion of Oxygen Vacancies on the TiO 2 (110) SurfaceScience, 2003
- The surface science of titanium dioxideSurface Science Reports, 2003
- The Effect of Size-Dependent Nanoparticle Energetics on Catalyst SinteringScience, 2002
- A high-pressure scanning tunneling microscopeReview of Scientific Instruments, 2001
- CO Oxidation over Supported Gold Catalysts—“Inert” and “Active” Support Materials and Their Role for the Oxygen Supply during ReactionJournal of Catalysis, 2001
- When Gold Is Not Noble: Nanoscale Gold CatalystsThe Journal of Physical Chemistry A, 1999
- Onset of Catalytic Activity of Gold Clusters on Titania with the Appearance of Nonmetallic PropertiesScience, 1998
- Electronic conduction above 4 K of slightly reduced oxygen-deficient rutilePhysical Review B, 1996
- Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected ResultsChemical Reviews, 1995