The structure of vanadium oxide on γ-alumina; an in-situ X-ray absorption study during catalytic oxidation

M. Ruitenbeek; F. M.F. De Groot; A. J. Van Dillen; D. C. Koningsberger

doi:10.1016/s0167-2991(00)80498-x

The structure of vanadium oxide on γ-alumina; an in-situ X-ray absorption study during catalytic oxidation

M. Ruitenbeek^*, F. M.F. De Groot, A. J. Van Dillen, D. C. Koningsberger

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

In-situ X-ray Absorption Fine Structure (XAFS) experiments with a 17.5 wt% V₂O₅ on Al₂O₃ catalyst showed that the supported V₂O₅ phase mainly consists of monomeric tetrahedral (Al-O)₃-V=O units after dehydration in air at 623 K. The vanadium oxide phase was reduced in CO/He at 723 K. It was found that the reduced species migrate into the γ-Al₂O₃ lattice, where the V³⁺ species are positioned at an Al³⁺ octahedral position. This migration process appears to be reversible, i.e. the (Al-O)₃-V=O units are thus restored by reoxidation.

Original language	English
Pages (from-to)	3101-3106
Number of pages	6
Journal	Studies in Surface Science and Catalysis
Volume	130 D
DOIs	https://doi.org/10.1016/s0167-2991(00)80498-x
Publication status	Published - 2000

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title = "The structure of vanadium oxide on γ-alumina; an in-situ X-ray absorption study during catalytic oxidation",

abstract = "In-situ X-ray Absorption Fine Structure (XAFS) experiments with a 17.5 wt% V2O5 on Al2O3 catalyst showed that the supported V2O5 phase mainly consists of monomeric tetrahedral (Al-O)3-V=O units after dehydration in air at 623 K. The vanadium oxide phase was reduced in CO/He at 723 K. It was found that the reduced species migrate into the γ-Al2O3 lattice, where the V3+ species are positioned at an Al3+ octahedral position. This migration process appears to be reversible, i.e. the (Al-O)3-V=O units are thus restored by reoxidation.",

author = "M. Ruitenbeek and {De Groot}, {F. M.F.} and {Van Dillen}, {A. J.} and Koningsberger, {D. C.}",

year = "2000",

doi = "10.1016/s0167-2991(00)80498-x",

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T1 - The structure of vanadium oxide on γ-alumina; an in-situ X-ray absorption study during catalytic oxidation

AU - Ruitenbeek, M.

AU - De Groot, F. M.F.

AU - Van Dillen, A. J.

AU - Koningsberger, D. C.

PY - 2000

Y1 - 2000

N2 - In-situ X-ray Absorption Fine Structure (XAFS) experiments with a 17.5 wt% V2O5 on Al2O3 catalyst showed that the supported V2O5 phase mainly consists of monomeric tetrahedral (Al-O)3-V=O units after dehydration in air at 623 K. The vanadium oxide phase was reduced in CO/He at 723 K. It was found that the reduced species migrate into the γ-Al2O3 lattice, where the V3+ species are positioned at an Al3+ octahedral position. This migration process appears to be reversible, i.e. the (Al-O)3-V=O units are thus restored by reoxidation.

AB - In-situ X-ray Absorption Fine Structure (XAFS) experiments with a 17.5 wt% V2O5 on Al2O3 catalyst showed that the supported V2O5 phase mainly consists of monomeric tetrahedral (Al-O)3-V=O units after dehydration in air at 623 K. The vanadium oxide phase was reduced in CO/He at 723 K. It was found that the reduced species migrate into the γ-Al2O3 lattice, where the V3+ species are positioned at an Al3+ octahedral position. This migration process appears to be reversible, i.e. the (Al-O)3-V=O units are thus restored by reoxidation.

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JO - Studies in Surface Science and Catalysis

JF - Studies in Surface Science and Catalysis

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The structure of vanadium oxide on γ-alumina; an in-situ X-ray absorption study during catalytic oxidation

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