1. An in-situ Reduction/Oxidation XAS Study on the EL10V8 VO x /TiO2(Anatase) Powder Catalyst.
- Author
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Silversmit, Geert, Poelman, Hilde, Sack, Isabelle, Buyle, Guy, Marin, Guy B., and Gryse, Roger De
- Subjects
CATALYSTS ,OXIDATION ,VANADIUM oxide ,VANADIUM ,X-ray spectroscopy ,SPECTRUM analysis ,CHEMICAL reactions - Abstract
The structural changes of the supported vanadium oxide in the V
2 O5 /TiO2 (anatase) EUROCAT EL10V8 powder catalyst during reduction and oxidation at 420 and 490 °C were studied with in-situ X-ray absorption spectroscopy (XAS). The Vanadium K-edge XAS results are compared with pure bulk V2 O5 . For the reduction–oxidation cycle at 420 °C, similar structural changes as for bulk V2 O5 were observed for the supported vanadium oxide: a reduction to the VO2 structure and re-oxidation back to V2 O5 . After reduction at 490 °C however, a different structure was obtained: very regular “VO6 ” octahedra with a V2.8+ valence. This may point to a structural support effect. [ABSTRACT FROM AUTHOR]- Published
- 2006
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