Titre :

Facile synthesis of highly dispersed and thermally stable copper-based nanoparticles supported on SBA-15 occluded with P123 surfactant for catalytic applications

Auteur(s) :

Chirieac, Alexandru [Auteur]
Dragoi, Brindusa [Auteur]
Ungureanu, Adrian [Auteur]
Ciotonea, Carmen [Auteur]
Mazilu, Irina [Auteur]
Royer, sebastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Mamede, Anne-Sophie [Auteur]
Rombi, Elisabetta [Auteur]
Ferino, Italo [Auteur]
Dumitriu, Emil [Auteur]

Titre de la revue :

Journal of Catalysis

Numéro :

339

Pagination :

270-283

Date de publication :

2016-07

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

Here, we show a strategy to control the dispersion, spatial distribution, and stabilization of copper-based nanoparticles on a micro–mesoporous silica support, as well as their impact on the catalytic activity. In this ...
Lire la suite >Here, we show a strategy to control the dispersion, spatial distribution, and stabilization of copper-based nanoparticles on a micro–mesoporous silica support, as well as their impact on the catalytic activity. In this respect, SBA-15 with P123 occluded mesopores was used as host to load, by impregnation, copper-based nanoparticles, whose dispersion was similar to that of the homologous NPs prepared by precipitation on the SBA-15 with open mesoporosity, while the thermal stability was better. The oxide and reduced forms of the catalysts were rigorously characterized by ICP-OES, low- and high-angle XRD, N2 physisorption, HRTEM/EDXS, TPR, in situ XRD, and in situ XPS. Due to their high practical impact, both the oxide and metallic forms of the copper-based NPs were evaluated for catalytic activity in CO oxidation and hydrogenation of cinnamaldehyde, respectively. It was shown that the high dispersion of copper-based NPs and the electron-deficient sites, such as M2+ with high affinity for the Cdouble bondO bond, are responsible for the outstanding catalytic performance of the solids. The paper demonstrates that using a simple impregnation method and a functionalized SBA-15 support, high-performance materials can be obtained avoiding the use of precipitating agents and strict control of the synthesis conditions.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Matériaux pour la catalyse (MATCAT)

Date de dépôt :

2019-09-25T14:38:10Z