Titre :

Reactive grinding synthesis of la(sr,ce)coo3 and their properties in toluene catalytic total oxidation

Auteur(s) :

Heidinger, Bertrand [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
royer, sebastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Giraudon, Jean-Marc [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Gardoll, Olivier [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Alamdari, Houshang [Auteur]
Lamonier, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Titre de la revue :

ChemCatChem

Numéro :

12

Pagination :

2271-2282

Date de publication :

2020-04-20

ISSN :

1867-3880

Mot(s)-clé(s) :

perovskite
reactive grinding
toluene
volatile organic compounds
catalytic oxidation

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

Perovskites-type metal oxides are an attractive alternative to noble metal-based materials for environmental catalysis. Nevertheless, they suffer from major issues such as unattractive textural properties and lower intrinsic ...
Lire la suite >Perovskites-type metal oxides are an attractive alternative to noble metal-based materials for environmental catalysis. Nevertheless, they suffer from major issues such as unattractive textural properties and lower intrinsic activities than those of noble metal counterparts. Reactive grinding (RG) has been already proved to be a powerful method to produce materials with improved textural properties. La1-xA’xCoO3 (A’: Sr, Ce) perovskite-type materials were synthesized by RG synthesis as a 3-steps top down method: (i) conventional solid-state reaction – SSR (leading to microcrystalline material); (ii) high energy ball milling – HEBM and (iii) low energy ball milling – LEBM. The physicochemical properties of perovskite materials were investigated by XRD, N2-physisorption, H2-TPR, O2-TPD and XPS, while their catalytic performances were evaluated for the toluene total oxidation reaction. In this study we showed that the HEBM step leads in a drastic reduction in crystal size to nanometric scale along with aggregation into dense particles. The LEBM step allows the deagglomeration of particles and specific surface areas were significantly increased. Their performances in the toluene total oxidation increased along grinding steps and a maximum of catalytic performance was observed for La0.9Sr0.1CoO3. This material also exhibited a high catalytic stability as a function of the reaction time, under dry and wet air reaction conditions.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

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

Équipe(s) de recherche :

Matériaux pour la catalyse (MATCAT)
Remédiation et matériaux catalytiques (REMCAT)

Date de dépôt :

2022-03-02T07:14:33Z
2023-03-22T12:58:14Z
2023-03-22T14:27:22Z