Title :

Controlling the distribution of cobalt (oxide) nanoparticles in the dual pore system of SBA-15 scaffolds

Author(s) :

Dragoi, Brindusa [Auteur]
Ungureanu, Adrian [Auteur]
Ciotonea, Carmen [Auteur]
Chirieac, Alexandru [Auteur]
Petit, S. [Auteur]
Royer, sebastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Dumitriu, Emil [Auteur]

Journal title :

Microporous and Mesoporous Materials

Volume number :

224

Pages :

176-189

Publication date :

2016-04

HAL domain(s) :

Chimie/Catalyse

English abstract : [en]

Different solvents (i.e., water, hexane-water mixture and ethanol) are used as dilution media for metal nitrate precursors. It was demonstrated that the interplay between the properties of the solvent and the particularities ...
Show more >Different solvents (i.e., water, hexane-water mixture and ethanol) are used as dilution media for metal nitrate precursors. It was demonstrated that the interplay between the properties of the solvent and the particularities of the SBA-15 scaffold is the key to control: (i) the localization of NPs, (i.e., confined in the main mesopores and/or in the intrawall micro-/mesopores), and (ii) the metal precursor-silica interactions through the formation of phyllosilicate-like phase (PS) stabilizing oxide phase, which in turn, enables achieving different dispersion degrees of the NPs. It was shown that the samples containing cobalt-based NPs confined into the intrawall pores as well as PS-like phases exhibited higher thermal stability but lower reducibility. The catalytic results, obtained on the active metallic phase for the hydrogenation of cinnamaldehyde, emphasize the role of the metal dispersion on the activity and selectivity in reaction of the material.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

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

Research team(s) :

Matériaux pour la catalyse (MATCAT)

Submission date :

2019-09-25T14:38:11Z