Cexzr1-xo2 mixed oxide as osc materials ...
Document type :
Article dans une revue scientifique: Article original
Permalink :
Title :
Cexzr1-xo2 mixed oxide as osc materials for supported pd three-way catalysts: flame-spray-pyrolysis vs. Co-precipitation
Author(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
Journal title :
Applied Catalysis A : General
Abbreviated title :
Appl. Catal. A-Gen.
Volume number :
598
Pages :
117527
Publication date :
2020-05-25
ISSN :
0926-860X
English keyword(s) :
Three-way catalysis
Flame-spray-pyrolysis
Palladium
Ceria-zirconia mixed oxide
Flame-spray-pyrolysis
Palladium
Ceria-zirconia mixed oxide
HAL domain(s) :
Chimie/Catalyse
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Research team(s) :
Matériaux pour la catalyse (MATCAT)
Remédiation et matériaux catalytiques (REMCAT)
Remédiation et matériaux catalytiques (REMCAT)
Submission date :
2022-03-02T07:14:40Z
2024-02-06T17:44:27Z
2024-02-06T17:44:27Z