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Onset of Catalytic Activity of Gold Clusters on Titania with the Appearance of Nonmetallic Properties
Abstract
Gold clusters ranging in diameter from 1 to 6 nanometers have been prepared on single crystalline surfaces of titania in ultrahigh vacuum to investigate the unusual size dependence of the low-temperature catalytic oxidation of carbon monoxide. Scanning tunneling microscopy/spectroscopy (STM/STS) and elevated pressure reaction kinetics measurements show that the structure sensitivity of this reaction on gold clusters supported on titania is related to a quantum size effect with respect to the thickness of the gold islands; islands with two layers of gold are most effective for catalyzing the oxidation of carbon monoxide. These results suggest that supported clusters, in general, may have unusual catalytic properties as one dimension of the cluster becomes smaller than three atomic spacings.
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Cited by
The surface science of titanium dioxide
Diebold, U. (2003) · Surface Science Reports · doi:10.1016/s0167-5729(02)00100-0 · Cited by 7,944
Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?
Xia, Y., Xiong, Y., Lim, B., & Skrabalak, S. E. (2009) · Angewandte Chemie International Edition · doi:10.1002/anie.200802248 · Cited by 5,702
Theoretical surface science and catalysis—calculations and concepts
Hammer, B., & Nørskov, J. K. (2000) · Advances in Catalysis · doi:10.1016/s0360-0564(02)45013-4 · Cited by 3,972
Hashmi, A. S. K., & Hutchings, G. J. (2006) · Angewandte Chemie International Edition · doi:10.1002/anie.200602454 · Cited by 3,423
Stabilization of Platinum Oxygen-Reduction Electrocatalysts Using Gold Clusters
Zhang, J., Sasaki, K., Sutter, E., & Adzic, R. R. (2007) · Science · doi:10.1126/science.1134569 · Cited by 1,779
Metadata
- Authors
- Valden, M., Lai, X., & Goodman, D. W.
- Venue
- Science
- Published
- 1998-09-11
- Volume
- 281
- Issue
- 5383
- Pages
- 1647-1650
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2022190942
- Cited by
- 4,136
- References
- 0
- FWCI
- 45.73
- Type
- journal article
- Language
- en
- Open access
- closed
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- Valden, M., Lai, X., & Goodman, D. W. (1998). Onset of Catalytic Activity of Gold Clusters on Titania with the Appearance of Nonmetallic Properties. Science. https://doi.org/10.1126/science.281.5383.1647
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