Abstract
Through an interplay between scanning tunneling microscopy experiments and density functional theory calculations, we determine unambiguously the active surface site responsible for the dissociation of water molecules adsorbed on rutile TiO(2)(110). Oxygen vacancies in the surface layer are shown to dissociate H(2)O through the transfer of one proton to a nearby oxygen atom, forming two hydroxyl groups for every vacancy. The amount of water dissociation is limited by the density of oxygen vacancies present on the clean surface exclusively. The dissociation process sets in as soon as molecular water is able to diffuse to the active site.
Keywords
Dissociation (chemistry)RutileSelf-ionization of waterOxygenMoleculeAdsorptionScanning tunneling microscopeOxygen atomDensity functional theoryMaterials scienceQuantum tunnellingChemical physicsPhysical chemistryPhysicsChemistryComputational chemistryNanotechnologyQuantum mechanics
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Publication Info
- Year
- 2001
- Type
- article
- Volume
- 87
- Issue
- 26
- Pages
- 266104-266104
- Citations
- 965
- Access
- Closed
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Cite This
Renald Schaub,
Peter Thostrup,
Núria López
et al.
(2001).
Oxygen Vacancies as Active Sites for Water Dissociation on Rutile<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>TiO</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>(</mml:mo><mml:mn>110</mml:mn><mml:mo>)</mml:mo></mml:math>.
Physical Review Letters
, 87
(26)
, 266104-266104.
https://doi.org/10.1103/physrevlett.87.266104
Identifiers
- DOI
- 10.1103/physrevlett.87.266104
- PMID
- 11800845