Electron Transfer-Induced Dynamics of Oxygen Molecules on the TiO2(110) Surface

Erik Wahlström; Ebbe K. Vestergaard; Renald Schaub; Anders Rønnau; Maiken Vestergaard; Erik Lægsgaard; Flemming Besenbacher

doi:10.1126/science.1093425

Electron Transfer-Induced Dynamics of Oxygen Molecules on the TiO₂(110) Surface

Erik Wahlström, Ebbe K. Vestergaard, Renald Schaub, Anders Rønnau, Maiken Vestergaard, Erik Lægsgaard, Flemming Besenbacher

Research output: Contribution to journal › Article › peer-review

179 Citations (Scopus)

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.

Original language	English
Pages (from-to)	511-513
Number of pages	3
Journal	Science
Volume	303
Issue number	5657
DOIs	https://doi.org/10.1126/science.1093425
Publication status	Published - Jan 2004

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AU - Lægsgaard, Erik

AU - Besenbacher, Flemming

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Electron Transfer-Induced Dynamics of Oxygen Molecules on the TiO₂(110) Surface

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