Journal
CHEMICAL PHYSICS LETTERS
Volume 515, Issue 4-6, Pages 249-253Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2011.09.017
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Funding
- Pembroke College (Oxford, UK)
- FUNDAYACUCHO (Caracas, Venezuela)
- EPSRC [EP/E025722/1]
- EPSRC [EP/E025722/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E025722/1] Funding Source: researchfish
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The influence of antimony co-doping on the electronic structure of rutile rhodium-doped TiO2 has been investigated by X-ray photoemission spectroscopy. Rh doping leads to the appearance of new Rh 4d states above the top of the O 2p valence band and the Fermi level shifts down from a position close to the conduction band minimum in undoped TiO2 to deeper in the gap. Sb co-doping restores the Fermi level to the top of the bandgap. These changes are consistent with a change in valence state from open shell t(2g)(5) Rh(IV) to closed shell t(2g)(6) Rh(III) upon Sb co-doping. (C) 2011 Elsevier B.V. All rights reserved.
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