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Small Au and Pt Clusters at the Anatase TiO2(101) Surface: Behavior at Terraces, Steps, and Surface Oxygen Vacancies
Abstract
The adsorption properties of Au and Pt metal nanoclusters on TiO2 anatase (101) were calculated using density functional theory. Structures and energetics of adsorbed Au and Pt monomers, dimers, and trimers at clean anatase TiO2(101) terraces and two major step edges, as well as O-vacancies, were systematically determined. The theoretical predictions were tested by vapor-depositing small coverages of Au and Pt on anatase (101) and investigating the resulting clusters with Scanning Tunneling Microscopy. On the clean surface, Au shows a strong tendency to form large clusters that nucleate on step edges. A preference for adsorption at type D-(112) steps is observed, which is probably a result of kinetic effects. For Pt, clusters as small as monomers are observed on the terraces, in agreement with the predicted large binding energy of 2.2 eV. Step edges play a less important role than in the case of Au. Oxygen vacancies, produced by electron irradiation, dramatically influence the growth of Au, while the nucleation behavior of Pt was found to be less affected.
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Citations
Cites
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Cited by
Metal Catalysts for Heterogeneous Catalysis: From Single Atoms to Nanoclusters and Nanoparticles
Liu, L., & Corma, A. (2018) · Chemical Reviews · doi:10.1021/acs.chemrev.7b00776 · Cited by 4,777
Advanced Nanoarchitectures for Solar Photocatalytic Applications
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Density functional theory for transition metals and transition metal chemistry
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Self-energy and excitonic effects in the electronic and optical properties ofTiO2crystalline phases
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Electronic interactions and charge transfers of metal atoms and clusters on oxide surfaces
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Metadata
- Authors
- Gong, X.-Q., Selloni, A., Dulub, O., Jacobson, P., & Diebold, U.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-12-11
- Volume
- 130
- Issue
- 1
- Pages
- 370-381
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2054591468
- Cited by
- 297
- References
- 2
- FWCI
- 5.12
- Type
- journal article
- Language
- en
- Open access
- closed
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