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Cluster-derived Ir-Sn/SiO2 catalysts for the catalytic dehydrogenation of propane: a spectroscopic studyDedicated to the memory of Dr Laura Sordelli
Ir-Sn bimetallic silica-based materials have been prepared via deposition of the molecular organometallic clusters (NEt 4 ) 2 [Ir 4 (CO) 10 (SnCl 3 ) 2 ] and NEt 4 [Ir 6 (CO) 15 (SnCl 3 )] or via deposition of Sn organometallic precursor Sn( n -C 4 H 9 ) 4 onto pre-formed Ir metal particles. These s...
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| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Online Access: | Get full text |
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| Summary: | Ir-Sn bimetallic silica-based materials have been prepared
via
deposition of the molecular organometallic clusters (NEt
4
)
2
[Ir
4
(CO)
10
(SnCl
3
)
2
] and NEt
4
[Ir
6
(CO)
15
(SnCl
3
)] or
via
deposition of Sn organometallic precursor Sn(
n
-C
4
H
9
)
4
onto pre-formed Ir metal particles. These solids possess promising properties, in terms of selectivity, as catalysts for propane dehydrogenation to propene. Detailed CO-adsorption DRIFTS, XANES and EXAFS characterization studies have been performed on these systems in order to compare the structural and electronic evolution of systems in relation to the nature of the Ir-Sn bonds present in the precursor compounds and to propose a structural model of the Ir-Sn species present at the silica surface of the final catalyst.
Ir-Sn bimetallic silica-based catalysts, prepared
via
deposition of the molecular clusters (NEt
4
)
2
[Ir
4
(CO)
10
(SnCl
3
)
2
] and NEt
4
[Ir
6
(CO)
15
(SnCl
3
)] or
via
deposition of Sn(
n
-C
4
H
9
)
4
onto pre-formed Ir metal particles, have been characterized by FT-IR and XAFS. |
|---|---|
| ISSN: | 1477-9226 1477-9234 |
| DOI: | 10.1039/c3dt51144h |