Cexzr1-xo2 mixed oxide as osc materials ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Cexzr1-xo2 mixed oxide as osc materials for supported pd three-way catalysts: flame-spray-pyrolysis vs. Co-precipitation
Auteur(s) :
Wu, J. [Auteur]
Glisenti, A. [Auteur]
Dipartimento di Scienze Chimiche [Padova]
Dacquin, Jean-Philippe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Dujardin, Christophe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Fernandez Acevedo, C. [Auteur]
Salazar Castro, C. [Auteur]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Glisenti, A. [Auteur]
Dipartimento di Scienze Chimiche [Padova]
Dacquin, Jean-Philippe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Dujardin, Christophe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Fernandez Acevedo, C. [Auteur]
Salazar Castro, C. [Auteur]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Titre de la revue :
Applied Catalysis A : General
Nom court de la revue :
Appl. Catal. A-Gen.
Numéro :
598
Pagination :
117527
Date de publication :
2020-05-25
ISSN :
0926-860X
Mot(s)-clé(s) en anglais :
Three-way catalysis
Flame-spray-pyrolysis
Palladium
Ceria-zirconia mixed oxide
Flame-spray-pyrolysis
Palladium
Ceria-zirconia mixed oxide
Discipline(s) HAL :
Chimie/Catalyse
Résumé en anglais : [en]
The three-way catalytic performances of Pd-doped CexZr1−xO2 mixed oxides prepared according to a one pot flame-spray-pyrolysis method and through a two steps preparation where Pd was subsequently impregnated on a commercial ...
Lire la suite >The three-way catalytic performances of Pd-doped CexZr1−xO2 mixed oxides prepared according to a one pot flame-spray-pyrolysis method and through a two steps preparation where Pd was subsequently impregnated on a commercial CexZr1−xO2 prepared by co-precipitation CZ(COP) were compared. flame-spray-pyrolysis led to bare CexZr1−xO2 CZ(FSP) having higher specific surface area and greater extent of defective sites compared to the co-precipitated sample. Pd incorporation led to drastic gain in activity likely related to the creation of dual sites combining metallic Pd atoms at the vicinity of labile oxygen species from the ceria-zirconia support. However, this peculiar kinetic behavior manifests more extensively on the impregnated Pd/CZ(COP) due to a higher density of metallic Pd sites and a stronger metal-support interaction which weakens the Ce-O bond. Such conclusion agrees with O2-TPD experiments revealing a higher surface oxygen mobility on Pd/CZ(COP) corresponding to higher reactivity of oxygen from the support.Lire moins >
Lire la suite >The three-way catalytic performances of Pd-doped CexZr1−xO2 mixed oxides prepared according to a one pot flame-spray-pyrolysis method and through a two steps preparation where Pd was subsequently impregnated on a commercial CexZr1−xO2 prepared by co-precipitation CZ(COP) were compared. flame-spray-pyrolysis led to bare CexZr1−xO2 CZ(FSP) having higher specific surface area and greater extent of defective sites compared to the co-precipitated sample. Pd incorporation led to drastic gain in activity likely related to the creation of dual sites combining metallic Pd atoms at the vicinity of labile oxygen species from the ceria-zirconia support. However, this peculiar kinetic behavior manifests more extensively on the impregnated Pd/CZ(COP) due to a higher density of metallic Pd sites and a stronger metal-support interaction which weakens the Ce-O bond. Such conclusion agrees with O2-TPD experiments revealing a higher surface oxygen mobility on Pd/CZ(COP) corresponding to higher reactivity of oxygen from the support.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)
Remédiation et matériaux catalytiques (REMCAT)
Remédiation et matériaux catalytiques (REMCAT)
Date de dépôt :
2022-03-02T07:14:40Z
2024-02-06T17:44:27Z
2024-02-06T17:44:27Z