Title :

Impact of Dual Calcium and Manganese Substitution of La-deficient perovskites on structural and related Catalytic Properties: Future opportunities in next Three-Way-Catalyst Generation?

Author(s) :

Wu, Jianxiong [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Zheng, Yuanshuang [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Dacquin, Jean-Philippe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Djelal, Nora [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Cordier, Catherine [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations - UMR 8207 [UMET]
Dujardin, Christophe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Applied Catalysis A : General

Volume number :

619

Pages :

118137

Publisher :

Elsevier BV

Publication date :

2021-04-08

ISSN :

0926-860X

English keyword(s) :

Perovskite
Three-way-catalyst
La-deficient La1-xFeO3
Dual calcium manganese substitution
CO and propene oxidation
NO reduction

HAL domain(s) :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

English abstract : [en]

The impact of La-deficiency and substitution by calcium and manganese in LaFeO3 has been investigated in Three-Way-Catalysis. Despite significant structural distortions, predominantly induced by calcium substitution, no ...
Show more >The impact of La-deficiency and substitution by calcium and manganese in LaFeO3 has been investigated in Three-Way-Catalysis. Despite significant structural distortions, predominantly induced by calcium substitution, no significant phase segregation occurs. On the other hand, bulk and surface characterization revealed the stabilization of Mn4+ and Fe4+ in different extent. Kinetic analysis of CO and propene oxidation reactions and the NO reduction reaction showed that La0.7Fe0.8Mn0.2O3 exhibits the best performance. By contrast, a detrimental effect of calcium more pronounced for propene oxidation is observed. It was found that catalytic properties are neither related to bulk properties nor to the extent of specific surface area but are mostly governed by the redox couple Mn4+/Mn3+. The formation of Fe4+ improving with partial substitution of La by Ca in A-site was not found as a determining criterion.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux
Matériaux pour la catalyse (MATCAT)
Remédiation et matériaux catalytiques (REMCAT)

Submission date :

2021-04-19T11:41:34Z
2021-04-30T13:25:17Z