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Structure of the Hydrated α-Al2O3(0001) Surface
Open accessAbstract
The physical and chemical properties of the hydrated α-Al 2 O 3(0001) surface are important for understanding the reactivity of natural and synthetic aluminum-containing oxides. The structure of this surface was determined in the presence of water vapor at 300 kelvin by crystal truncation rod diffraction at a third-generation synchrotron x-ray source. The fully hydrated surface is oxygen terminated, with a 53% contracted double Al layer directly below. The structure is an intermediate between α-Al 2 O 3 and γ-Al(OH)3, a fully hydroxylated form of alumina. A semiordered oxygen layer about 2.3 angstroms above the terminal oxygen layer is interpreted as adsorbed water. The clean α-Al 2 O 3(0001) surface, in contrast, is Al terminated and significantly relaxed relative to the bulk structure. These differences explain the different reactivities of the clean and hydroxylated surfaces.
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Cited by
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Human Health Risk Assessment for Aluminium, Aluminium Oxide, and Aluminium Hydroxide
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Verdaguer, A., Sacha, G. M., Bluhm, H., & Salmeron, M. (2006) · Chemical Reviews · doi:10.1021/cr040376l · Cited by 627
Waychunas, G. A., Kim, C. S., & Banfield, J. F. (2005) · Journal of Nanoparticle Research · doi:10.1007/s11051-005-6931-x · Cited by 616
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Metadata
- Authors
- Eng, P. J., Trainor, T. P., Brown Jr., G. E., Waychunas, G. A., Newville, M., Sutton, S. R., & Rivers, M. L.
- Venue
- Science
- Published
- 2000-05-12
- Volume
- 288
- Issue
- 5468
- Pages
- 1029-1033
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2064002302
- Cited by
- 565
- References
- 0
- FWCI
- 17.94
- Type
- journal article
- Language
- en
- Open access
- green
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- Eng, P. J., Trainor, T. P., Brown Jr., G. E., Waychunas, G. A., Newville, M., Sutton, S. R., & Rivers, M. L. (2000). Structure of the Hydrated α-Al2O3(0001) Surface. Science. https://doi.org/10.1126/science.288.5468.1029
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