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Charge transfer in Cr adsorption and reaction at the rutile TiO2(110) surface

Nolan, M., Mulley, J. S. and Bennett, R. A. (2009) Charge transfer in Cr adsorption and reaction at the rutile TiO2(110) surface. Physical Chemistry Chemical Physics, 11. pp. 2156-2160. ISSN 1463-9076

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To link to this item DOI: 10.1039/b819724e

Abstract/Summary

The rutile TiO2(110) surface has been doped with sub-monolayer metallic Cr, which oxidises and donates charge to specific surface Ti ions. X-Ray and ultra violet photoemission spectroscopy and first principles density functional theory with Hubbard U are used to assign the oxidation states of Cr and surface Ti and we find that Cr2+ forms on bridging oxygen ions and a 5-fold coordinated surface Ti atom is reduced to Ti3+ and the Cr ions readily react with oxygen (to Cr3+), which leads to depletion of surface Ti3+ 3d electrons.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:16777
Publisher:Royal Society of Chemistry

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