The selective hydrogenation of α,β-unsaturated aldehydes is an ideal case for studying the structure–activity relationships in heterogeneous catalysis. In particular, cinnamaldehyde can be used as probe molecule for revealing the competition between hydrogenation of C=C and C=O bond. Here, we investigated the effect of the modification of some Pt supported on carbon catalysts by WO x species in cinnamaldehyde hydrogenation as WO x species are reported to increase the adsorption and activation of the C=O group of α, β-unsaturated aldehydes. Classical techniques used for correlating the catalyst activity and the selectivity to the characteristic of the materials (XRD, HAADF-STEM, XEDS mapping and XPS) have been coupled with NMR relaxometry, a ground breaking technique, to disclose how the molecule approaches the catalyst surface. This indeed constitutes a crucial aspect that rule the catalytic activity. Therefore, an innovative, holistic approach have been used to consider the whole catalytic system.

Pt‐WOx/C catalysts for α, β‐ unsaturated aldehydes hydrogenation: a NMR study of the effect of the reactant adsorption on activity and selectivity / M. Stucchi, F. Vasile, S. Cattaneo, A. Vomeri, A.B. Hungria, L. Prati. - In: EUROPEAN JOURNAL OF ORGANIC CHEMISTRY. - ISSN 1434-193X. - (2022). [Epub ahead of print] [10.1002/ejoc.202200735]

Pt‐WOx/C catalysts for α, β‐ unsaturated aldehydes hydrogenation: a NMR study of the effect of the reactant adsorption on activity and selectivity

M. Stucchi
Primo
;
F. Vasile
Secondo
;
S. Cattaneo;A. Vomeri
Penultimo
;
L. Prati
Ultimo
2022

Abstract

The selective hydrogenation of α,β-unsaturated aldehydes is an ideal case for studying the structure–activity relationships in heterogeneous catalysis. In particular, cinnamaldehyde can be used as probe molecule for revealing the competition between hydrogenation of C=C and C=O bond. Here, we investigated the effect of the modification of some Pt supported on carbon catalysts by WO x species in cinnamaldehyde hydrogenation as WO x species are reported to increase the adsorption and activation of the C=O group of α, β-unsaturated aldehydes. Classical techniques used for correlating the catalyst activity and the selectivity to the characteristic of the materials (XRD, HAADF-STEM, XEDS mapping and XPS) have been coupled with NMR relaxometry, a ground breaking technique, to disclose how the molecule approaches the catalyst surface. This indeed constitutes a crucial aspect that rule the catalytic activity. Therefore, an innovative, holistic approach have been used to consider the whole catalytic system.
Settore CHIM/03 - Chimica Generale e Inorganica
Settore CHIM/06 - Chimica Organica
Settore CHIM/02 - Chimica Fisica
2022
21-set-2022
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/938930
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