Poisoning Experiments Aimed at Discriminating Active and Less-Active Sites of Silica-Supported Tantalum Hydride for Alkane Metathesis

Guillaume Saggio; Mostafa Taoufik; Jean-Marie Basset; Jean Thivolle-Cazat

doi:10.1002/cctc.201000199

Poisoning Experiments Aimed at Discriminating Active and Less-Active Sites of Silica-Supported Tantalum Hydride for Alkane Metathesis

Guillaume Saggio, Mostafa Taoufik, Jean-Marie Basset, Jean Thivolle-Cazat

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

11 Scopus citations

Abstract

Only 50% of the silica-supported tantalum hydride sites are active in the metathesis of propane. Indeed, more than 45% of the tantalum hydride can be eliminated by a selective oxygen poisoning of inactive sites with no significant decrease in the global turnover. Conversely, cyclopentane induces no such selective poisoning. Hence, the active tantalum hydride sites that show greater resistance to oxygen poisoning correspond to the νTa-H bands of higher wavenumbers, particularly that at 1860cm-1. These active tantalum hydride sites should correspond to tris- or monohydride species relatively far from silica surface oxygen atoms. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English (US)
Pages (from-to)	1594-1598
Number of pages	5
Journal	ChemCatChem
Volume	2
Issue number	12
DOIs	https://doi.org/10.1002/cctc.201000199
State	Published - Oct 4 2010

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thank the CNRS, ESCPE-Lyon and the BP Company for financial support.

ASJC Scopus subject areas

Inorganic Chemistry
Physical and Theoretical Chemistry
Organic Chemistry
Catalysis

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Cite this

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title = "Poisoning Experiments Aimed at Discriminating Active and Less-Active Sites of Silica-Supported Tantalum Hydride for Alkane Metathesis",

abstract = "Only 50% of the silica-supported tantalum hydride sites are active in the metathesis of propane. Indeed, more than 45% of the tantalum hydride can be eliminated by a selective oxygen poisoning of inactive sites with no significant decrease in the global turnover. Conversely, cyclopentane induces no such selective poisoning. Hence, the active tantalum hydride sites that show greater resistance to oxygen poisoning correspond to the νTa-H bands of higher wavenumbers, particularly that at 1860cm-1. These active tantalum hydride sites should correspond to tris- or monohydride species relatively far from silica surface oxygen atoms. {\textcopyright} 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

author = "Guillaume Saggio and Mostafa Taoufik and Jean-Marie Basset and Jean Thivolle-Cazat",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The authors thank the CNRS, ESCPE-Lyon and the BP Company for financial support.",

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T1 - Poisoning Experiments Aimed at Discriminating Active and Less-Active Sites of Silica-Supported Tantalum Hydride for Alkane Metathesis

AU - Saggio, Guillaume

AU - Taoufik, Mostafa

AU - Basset, Jean-Marie

AU - Thivolle-Cazat, Jean

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The authors thank the CNRS, ESCPE-Lyon and the BP Company for financial support.

PY - 2010/10/4

Y1 - 2010/10/4

N2 - Only 50% of the silica-supported tantalum hydride sites are active in the metathesis of propane. Indeed, more than 45% of the tantalum hydride can be eliminated by a selective oxygen poisoning of inactive sites with no significant decrease in the global turnover. Conversely, cyclopentane induces no such selective poisoning. Hence, the active tantalum hydride sites that show greater resistance to oxygen poisoning correspond to the νTa-H bands of higher wavenumbers, particularly that at 1860cm-1. These active tantalum hydride sites should correspond to tris- or monohydride species relatively far from silica surface oxygen atoms. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - Only 50% of the silica-supported tantalum hydride sites are active in the metathesis of propane. Indeed, more than 45% of the tantalum hydride can be eliminated by a selective oxygen poisoning of inactive sites with no significant decrease in the global turnover. Conversely, cyclopentane induces no such selective poisoning. Hence, the active tantalum hydride sites that show greater resistance to oxygen poisoning correspond to the νTa-H bands of higher wavenumbers, particularly that at 1860cm-1. These active tantalum hydride sites should correspond to tris- or monohydride species relatively far from silica surface oxygen atoms. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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UR - http://doi.wiley.com/10.1002/cctc.201000199

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ER -

Poisoning Experiments Aimed at Discriminating Active and Less-Active Sites of Silica-Supported Tantalum Hydride for Alkane Metathesis

Abstract

Bibliographical note

ASJC Scopus subject areas

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