Facile preparation of Ni/Al 2 O 3 catalytic ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Facile preparation of Ni/Al 2 O 3 catalytic formulations with the aid of cyclodextrin complexes: Towards highly active and robust catalysts for the direct amination of alcohols
Auteur(s) :
Tomer, Ajay [Auteur]
Wyrwalski, Frederic [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Przybylski, Cédric [Auteur]
Paul, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Monflier, Eric [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Pera-Titus, Marc [Auteur]
Ponchel, Anne [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Wyrwalski, Frederic [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Przybylski, Cédric [Auteur]
Paul, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Monflier, Eric [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Pera-Titus, Marc [Auteur]
Ponchel, Anne [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Titre de la revue :
Journal of Catalysis
Numéro :
356
Pagination :
111-124
Date de publication :
2017-12
Discipline(s) HAL :
Chimie/Catalyse
Chimie/Chimie théorique et/ou physique
Chimie/Chimie théorique et/ou physique
Résumé en anglais : [en]
A series of Ni/Al2O3 catalysts with variable Ni loading (2–20 wt%) were prepared by aqueous wet impregnation of a nitrate precursor using native cyclodextrins as metal complex hosts. The impact of β-CD was carefully ...
Lire la suite >A series of Ni/Al2O3 catalysts with variable Ni loading (2–20 wt%) were prepared by aqueous wet impregnation of a nitrate precursor using native cyclodextrins as metal complex hosts. The impact of β-CD was carefully characterized at different stages of the preparation by a set of complementary techniques including TG-MS analysis, mass spectrometry, X-ray diffraction, temperature-programmed reduction, CO pulse chemisorption, X-ray photoelectron spectroscopy and electron microscopy. It was found that the use of cyclodextrins afforded a much higher Ni dispersion and narrower distribution of Ni particle sizes, as well as a much higher availability of reduced surface Ni species. As a result, the cyclodextrin-assisted catalysts exhibited enhanced catalytic properties in the direct amination of benzyl alcohol with aniline and 1-octanol with ammonia, both operated via the hydrogen borrowing mechanism. Furthermore, the use of cyclodextrins allowed a significant improvement of the robustness of the catalysts by mitigating the nickel leaching during reaction.Lire moins >
Lire la suite >A series of Ni/Al2O3 catalysts with variable Ni loading (2–20 wt%) were prepared by aqueous wet impregnation of a nitrate precursor using native cyclodextrins as metal complex hosts. The impact of β-CD was carefully characterized at different stages of the preparation by a set of complementary techniques including TG-MS analysis, mass spectrometry, X-ray diffraction, temperature-programmed reduction, CO pulse chemisorption, X-ray photoelectron spectroscopy and electron microscopy. It was found that the use of cyclodextrins afforded a much higher Ni dispersion and narrower distribution of Ni particle sizes, as well as a much higher availability of reduced surface Ni species. As a result, the cyclodextrin-assisted catalysts exhibited enhanced catalytic properties in the direct amination of benzyl alcohol with aniline and 1-octanol with ammonia, both operated via the hydrogen borrowing mechanism. Furthermore, the use of cyclodextrins allowed a significant improvement of the robustness of the catalysts by mitigating the nickel leaching during reaction.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Collections :
Équipe(s) de recherche :
Catalyse et chimie supramoléculaire (CASU)
Modélisation et spectroscopies (MODSPEC)
Modélisation et spectroscopies (MODSPEC)
Date de dépôt :
2019-09-25T14:05:53Z