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The local structure of OH species on the V2O3(0 0 0 1) surface: a scanned-energy mode photoelectron diffraction study
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Kröger, E. A., Sayago, D. I., Allegretti, F., Knight, M. J., Polcik, M., Unterberger, W. (Werner), Lerotholi, T. J., Hogan, K. A., Lamont, C. L. A., Cavalleri, M., Hermann, K. and Woodruff, D. P. (2008) The local structure of OH species on the V2O3(0 0 0 1) surface: a scanned-energy mode photoelectron diffraction study. Surface Science, Vol.602 (No.6). pp. 1267-1279. doi:10.1016/j.susc.2008.01.033
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Official URL: http://dx.doi.org/10.1016/j.susc.2008.01.033
Abstract
Scanned-energy mode photoelectron diffraction (PhD), using O 1s photoemission, together with multiple-scattering simulations, have been used to investigate the structure of the hydroxyl species, OH, adsorbed on a V2O3(0 0 0 1) surface. Surface OH species were obtained by two alternative methods; reaction with molecular water and exposure to atomic H resulted in closely similar PhD spectra. Both qualitative assessment and the results of multiple-scattering calculations are consistent with a model in which only the O atoms of outermost layer of the oxide surface are hydroxylated. These results specifically exclude significant coverage of OH species atop the outermost V atoms, i.e. in vanadyl O atom sites. Ab initio density-functional theory cluster calculations provide partial rationalisation of this result, which is discussed the context of the general understanding of this system.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Photoelectron spectroscopy -- Research, Cluster theory (Nuclear physics), Density functionals -- Research, Vanadium oxide -- Research, Surfaces (Physics) -- Analysis | ||||
| Journal or Publication Title: | Surface Science | ||||
| Publisher: | Elsevier BV | ||||
| ISSN: | 0039-6028 | ||||
| Official Date: | 15 March 2008 | ||||
| Dates: |
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| Volume: | Vol.602 | ||||
| Number: | No.6 | ||||
| Page Range: | pp. 1267-1279 | ||||
| DOI: | 10.1016/j.susc.2008.01.033 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Deutsche Forschungsgemeinschaft (DFG), Alexander von Humboldt-Stiftung (AvHS) |
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