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  Influence of the geometric structure on the V L3 near edge X-ray absorption fine structure from vanadium phosphorus oxide catalysts

Hävecker, M., Knop-Gericke, A., Mayer, R. W., Fait, M., Bluhm, H., & Schlögl, R. (2002). Influence of the geometric structure on the V L3 near edge X-ray absorption fine structure from vanadium phosphorus oxide catalysts. Journal of Electron Spectroscopy and Related Phenomena, 125(2), 79-87. doi:10.1016/S0368-2048(02)00090-7.

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Hävecker, Michael1, Author              
Knop-Gericke, Axel1, Author              
Mayer, Ralf W.1, Author              
Fait, Martin1, Author              
Bluhm, Hendrik1, Author              
Schlögl, Robert1, Author              
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1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: 14, Electronic structure of oxide catalysts
 Abstract: We present the V L3 near edge X-ray absorption fine structure (NEXAFS) of a vanadium phosphorus oxide (VPO) catalyst. The spectrum is related to the V3d-O2p hybridised unoccupied states. The overall peak position at the V L3-absorption edge is determined by the formal oxidation state of the absorbing vanadium atom. Details of the absorption fine structure are influenced by the geometric structure of the compound. Empirically we found a linear relationship between the energy position of several absorption resonances and the V-O bond length of the participating atoms. This allows to identify the contribution of specific V-O bonds to the near edge X-ray absorption fine structure. The bond length / resonance position relationship will be discussed under consideration of relations between geometric structure and NEXAFS features observed in X-ray absorption experiments and theory.

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 Dates: 2002
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: eDoc: 1825
DOI: 10.1016/S0368-2048(02)00090-7
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Title: Journal of Electron Spectroscopy and Related Phenomena
Source Genre: Journal
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Pages: - Volume / Issue: 125 (2) Sequence Number: - Start / End Page: 79 - 87 Identifier: -