The structure of a VOx/TiO2(anatase) powder Catalyst under reduction and oxidation at 623 K

G. Silversmit; J.A. van Bokhoven; H. Poelman; A. van der Eerden; G.B. Marin; M.-F. Reyniers; R. de Gryse

doi:10.1238/Physica.Topical.115a00798

The structure of a VOx/TiO2(anatase) powder Catalyst under reduction and oxidation at 623 K

G. Silversmit, J.A. van Bokhoven, H. Poelman, A. van der Eerden, G.B. Marin, M.-F. Reyniers, R. de Gryse

extern

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

Abstract

The structure of a TiO2(anatase)-supported vanadium oxide powder catalyst was determined during a reduction-oxidation cycle at 623 K. A similar treatment was given to a pure V2O5 powder as reference system. The structural changes due to the reduction and oxidation on the supported and unsupported vanadium oxide were compared. A V2O5-like structure is present on the supported vanadium oxide after an initial oxidation at 623 K. The EXAFS fits point towards V2O5-clusters on the TiO2 support. A reduction with H2 at 623 K reduced the supported vanadium oxide to the V4+ valence state and had the same structural effect as on the V2O5. The successive reoxidation restored the V2O5-structure on both systems.

Original language	English
Pages (from-to)	798-801
Number of pages	4
Journal	Physica Scripta
Volume	T115
DOIs	https://doi.org/10.1238/Physica.Topical.115a00798
Publication status	Published - 2005

Bibliographical note

PROCEEDINGS OF THE 12th X-RAY ABSORPTION FINE STRUCTURE INTERNATIONAL CONFERENCE (XAFS12) 23–27 June 2003, Malmö, Sweden

Access to Document

10.1238/Physica.Topical.115a00798

Cite this

@article{880a67ec1abc4c35bdce7cb512f45edb,

title = "The structure of a VOx/TiO2(anatase) powder Catalyst under reduction and oxidation at 623 K",

abstract = "The structure of a TiO2(anatase)-supported vanadium oxide powder catalyst was determined during a reduction-oxidation cycle at 623 K. A similar treatment was given to a pure V2O5 powder as reference system. The structural changes due to the reduction and oxidation on the supported and unsupported vanadium oxide were compared. A V2O5-like structure is present on the supported vanadium oxide after an initial oxidation at 623 K. The EXAFS fits point towards V2O5-clusters on the TiO2 support. A reduction with H2 at 623 K reduced the supported vanadium oxide to the V4+ valence state and had the same structural effect as on the V2O5. The successive reoxidation restored the V2O5-structure on both systems.",

author = "G. Silversmit and {van Bokhoven}, J.A. and H. Poelman and {van der Eerden}, A. and G.B. Marin and M.-F. Reyniers and {de Gryse}, R.",

note = "PROCEEDINGS OF THE 12th X-RAY ABSORPTION FINE STRUCTURE INTERNATIONAL CONFERENCE (XAFS12) 23–27 June 2003, Malm{\"o}, Sweden",

year = "2005",

doi = "10.1238/Physica.Topical.115a00798",

language = "English",

volume = "T115",

pages = "798--801",

journal = "Physica Scripta",

issn = "0031-8949",

publisher = "Institute of Physics",

}

TY - JOUR

T1 - The structure of a VOx/TiO2(anatase) powder Catalyst under reduction and oxidation at 623 K

AU - Silversmit, G.

AU - van Bokhoven, J.A.

AU - Poelman, H.

AU - van der Eerden, A.

AU - Marin, G.B.

AU - Reyniers, M.-F.

AU - de Gryse, R.

N1 - PROCEEDINGS OF THE 12th X-RAY ABSORPTION FINE STRUCTURE INTERNATIONAL CONFERENCE (XAFS12) 23–27 June 2003, Malmö, Sweden

PY - 2005

Y1 - 2005

N2 - The structure of a TiO2(anatase)-supported vanadium oxide powder catalyst was determined during a reduction-oxidation cycle at 623 K. A similar treatment was given to a pure V2O5 powder as reference system. The structural changes due to the reduction and oxidation on the supported and unsupported vanadium oxide were compared. A V2O5-like structure is present on the supported vanadium oxide after an initial oxidation at 623 K. The EXAFS fits point towards V2O5-clusters on the TiO2 support. A reduction with H2 at 623 K reduced the supported vanadium oxide to the V4+ valence state and had the same structural effect as on the V2O5. The successive reoxidation restored the V2O5-structure on both systems.

AB - The structure of a TiO2(anatase)-supported vanadium oxide powder catalyst was determined during a reduction-oxidation cycle at 623 K. A similar treatment was given to a pure V2O5 powder as reference system. The structural changes due to the reduction and oxidation on the supported and unsupported vanadium oxide were compared. A V2O5-like structure is present on the supported vanadium oxide after an initial oxidation at 623 K. The EXAFS fits point towards V2O5-clusters on the TiO2 support. A reduction with H2 at 623 K reduced the supported vanadium oxide to the V4+ valence state and had the same structural effect as on the V2O5. The successive reoxidation restored the V2O5-structure on both systems.

U2 - 10.1238/Physica.Topical.115a00798

DO - 10.1238/Physica.Topical.115a00798

M3 - Article

SN - 0031-8949

VL - T115

SP - 798

EP - 801

JO - Physica Scripta

JF - Physica Scripta

ER -

The structure of a VOx/TiO2(anatase) powder Catalyst under reduction and oxidation at 623 K

Abstract

Bibliographical note

Access to Document

Fingerprint

Cite this