Characterization of H PMo V O heteropolyacids supported on HMS mesoporous molecular sieve and their catalytic performance in propene oxidation

S. Benadji, P. Eloy, A. Leonard, B.-L. Su, C. Rabia, E.M. Gaigneaux

Research output: Contribution to journalArticle

Abstract

Materials, consisting of H PMo V O heteropolyacids (HPAs) with x = 0-3, supported on a HMS mesoporous pure-silica molecular sieve, have been prepared by means of dry impregnation method and characterized by elemental analysis, X-ray diffraction, transmission and diffuse reflectance (DR) FT-IR, Raman and X-ray photoelectron spectroscopies, nitrogen physisorption and thermal analysis (TG-DTA). The HPA/HMS compositions with HPA loadings from 10 to 50 wt.% display uniformly sized mesopores. HPA retains the Keggin structure on the HMS surface and forms finely dispersed HPA species over the whole range of HPA loadings, crystal phases being absent even at 50 wt.%. Results demonstrate that HPA/HMS exhibit a higher catalytic activity than bulk heteropolyacids in propene oxidation by molecular oxygen. Furthermore, the supported species allow for an enhanced oxidation catalytic activity (formation of acrolein, acetaldehyde and acetic acid) compared to the mother catalysts. The catalytic performance exhibited by H PMo V O /HMS catalysts was attributed to the fine dispersion of H PMo V O species on the HMS mesoporous material via physical adsorption. The HPA/HMS systems, with strong acid sites, high redox power and a regular mesoporous distribution, are promising catalysts for the oxidative reactions.
Original languageEnglish
Pages (from-to)153-163
Number of pages11
JournalMicroporous and Mesoporous Materials
Volume154
DOIs
Publication statusPublished - 15 May 2012

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Molecular sieves
absorbents
Propylene
catalysts
Oxidation
oxidation
acids
Catalysts
catalytic activity
Catalyst activity
thermal analysis
Acrolein
Mesoporous materials
Physisorption
Acetaldehyde
Molecular oxygen
acetaldehyde
Chemical analysis
acetic acid
Acetic acid

Cite this

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title = "Characterization of H PMo V O heteropolyacids supported on HMS mesoporous molecular sieve and their catalytic performance in propene oxidation",
abstract = "Materials, consisting of H PMo V O heteropolyacids (HPAs) with x = 0-3, supported on a HMS mesoporous pure-silica molecular sieve, have been prepared by means of dry impregnation method and characterized by elemental analysis, X-ray diffraction, transmission and diffuse reflectance (DR) FT-IR, Raman and X-ray photoelectron spectroscopies, nitrogen physisorption and thermal analysis (TG-DTA). The HPA/HMS compositions with HPA loadings from 10 to 50 wt.{\%} display uniformly sized mesopores. HPA retains the Keggin structure on the HMS surface and forms finely dispersed HPA species over the whole range of HPA loadings, crystal phases being absent even at 50 wt.{\%}. Results demonstrate that HPA/HMS exhibit a higher catalytic activity than bulk heteropolyacids in propene oxidation by molecular oxygen. Furthermore, the supported species allow for an enhanced oxidation catalytic activity (formation of acrolein, acetaldehyde and acetic acid) compared to the mother catalysts. The catalytic performance exhibited by H PMo V O /HMS catalysts was attributed to the fine dispersion of H PMo V O species on the HMS mesoporous material via physical adsorption. The HPA/HMS systems, with strong acid sites, high redox power and a regular mesoporous distribution, are promising catalysts for the oxidative reactions.",
author = "S. Benadji and P. Eloy and A. Leonard and B.-L. Su and C. Rabia and E.M. Gaigneaux",
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Characterization of H PMo V O heteropolyacids supported on HMS mesoporous molecular sieve and their catalytic performance in propene oxidation. / Benadji, S.; Eloy, P.; Leonard, A.; Su, B.-L.; Rabia, C.; Gaigneaux, E.M.

In: Microporous and Mesoporous Materials, Vol. 154, 15.05.2012, p. 153-163.

Research output: Contribution to journalArticle

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T1 - Characterization of H PMo V O heteropolyacids supported on HMS mesoporous molecular sieve and their catalytic performance in propene oxidation

AU - Benadji, S.

AU - Eloy, P.

AU - Leonard, A.

AU - Su, B.-L.

AU - Rabia, C.

AU - Gaigneaux, E.M.

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