Enhancement of the dispersion and catalytic ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Enhancement of the dispersion and catalytic performances of copper in the hydrogenation of cinnamaldehyde by incorporation of aluminium into mesoporous sba-15 silica
Auteur(s) :
Ungureanu, Adrian [Auteur]
Chirieac, Alexandru [Auteur]
Ciotonea, Carmen [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
"Gheorghe Asachi" Technical University of Iasi [TUIASI]
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
Mazilu, Irina [Auteur]
Catrinescu, Cezar [Auteur]
Petit, Sabine [Auteur]
Marceau, Eric [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
royer, sebastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
Dumitriu, Emil [Auteur]
Chirieac, Alexandru [Auteur]
Ciotonea, Carmen [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
"Gheorghe Asachi" Technical University of Iasi [TUIASI]
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
Mazilu, Irina [Auteur]
Catrinescu, Cezar [Auteur]
Petit, Sabine [Auteur]
Marceau, Eric [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
royer, sebastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
Dumitriu, Emil [Auteur]
Titre de la revue :
Applied Catalysis A : General
Nom court de la revue :
Appl. Catal. A-Gen.
Numéro :
598
Pagination :
117615
Éditeur :
Elsevier
Date de publication :
2020-05-25
ISSN :
0926-860X
Mot(s)-clé(s) en anglais :
Copper
Dispersion
Cinnamaldehyde
SBA-15
Hydrogenation
Dispersion
Cinnamaldehyde
SBA-15
Hydrogenation
Discipline(s) HAL :
Chimie/Catalyse
Résumé en anglais : [en]
Copper is active in hydrogenation reactions, but it is a base metal difficult to disperse inside mesostructured supports, with adverse consequences on the catalytic properties. Incorporating aluminium into mesoporous SBA-15 ...
Lire la suite >Copper is active in hydrogenation reactions, but it is a base metal difficult to disperse inside mesostructured supports, with adverse consequences on the catalytic properties. Incorporating aluminium into mesoporous SBA-15 silicas allows solving both problems of Cu dispersion and activity. The incorporation of 20 wt.% Al2O3 in the SBA-15 host structure leads to an increase of the copper metallic surface area by a factor 6 compared to the pure siliceous SBA-15-supported catalyst. The support also proves to be stable upon exposure to the impregnation aqueous solution used for copper introduction. The incorporation of Al provides Lewis acidic sites that favour the transformation of cinnamaldehyde into cinnamyl alcohol, a feature usually assigned to larger metal particles. As a consequence, the catalytic activity of Cu catalysts is enhanced compared to silica-supported Cu catalysts, while the chemoselectivity towards the unsaturated alcohol appears to be similar to that of a mesoporous alumina-supported system.Lire moins >
Lire la suite >Copper is active in hydrogenation reactions, but it is a base metal difficult to disperse inside mesostructured supports, with adverse consequences on the catalytic properties. Incorporating aluminium into mesoporous SBA-15 silicas allows solving both problems of Cu dispersion and activity. The incorporation of 20 wt.% Al2O3 in the SBA-15 host structure leads to an increase of the copper metallic surface area by a factor 6 compared to the pure siliceous SBA-15-supported catalyst. The support also proves to be stable upon exposure to the impregnation aqueous solution used for copper introduction. The incorporation of Al provides Lewis acidic sites that favour the transformation of cinnamaldehyde into cinnamyl alcohol, a feature usually assigned to larger metal particles. As a consequence, the catalytic activity of Cu catalysts is enhanced compared to silica-supported Cu catalysts, while the chemoselectivity towards the unsaturated alcohol appears to be similar to that of a mesoporous alumina-supported system.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Matériaux pour la catalyse (MATCAT)
Date de dépôt :
2022-03-02T07:14:40Z
2023-03-15T15:38:05Z
2023-03-15T15:38:05Z