Properties evolution of LaCoO<sub>3</sub> ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Properties evolution of LaCoO<sub>3</sub> Perovskite synthesized by reactive grinding - Application to the toluene oxidation reaction
Auteur(s) :
Heidinger, B. [Auteur]
Université Laval [Québec] [ULaval]
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
Simon, Pardis [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bion, N. [Auteur]
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
Alamdari, H. [Auteur]
Université Laval [Québec] [ULaval]
Lamonier, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Heidinger, B. [Auteur]
Université Laval [Québec] [ULaval]
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
Simon, Pardis [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bion, N. [Auteur]
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
Alamdari, H. [Auteur]
Université Laval [Québec] [ULaval]
Lamonier, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Heidinger, B. [Auteur]
Titre de la revue :
Journal of Environmental Chemical Engineering
Nom court de la revue :
J. Environ. Chem. Eng.
Numéro :
12
Pagination :
112107
Date de publication :
2024-04-05
ISSN :
2213-2929
Mot(s)-clé(s) en anglais :
Perovskite
Reactive grinding
Catalytic oxidation
Volatile organic compounds
Toluene
Reactive grinding
Catalytic oxidation
Volatile organic compounds
Toluene
Discipline(s) HAL :
Chimie/Catalyse
Résumé en anglais : [en]
Perovskites are well known materials that are considered as viable alternative to noble metal-based catalysts in the environmental field. To be competitive, major issues such as unattractive textural properties and lower ...
Lire la suite >Perovskites are well known materials that are considered as viable alternative to noble metal-based catalysts in the environmental field. To be competitive, major issues such as unattractive textural properties and lower intrinsic activities than those of noble metal counterparts must be first addressed. On the other hand, reactive grinding is a versatile method to efficiently synthesize materials with improved textural properties, depending on the sequence and parameters. LaCoO3 perovskites were synthesized by a three-step reactive grinding top-down process: (i) solid-state reaction – SSR; (ii) high energy ball milling – HEBM; (iii) low energy ball milling – LEBM. The physicochemical properties evolution of perovskite materials over the reactive grinding process was investigated by XRD, N2-physisorption, ICP-OES, XPS, H2-TPR, O2-TPD and OIE, while their catalytic performances were evaluated for the toluene total oxidation reaction in dry and wet conditions. Each successive reactive grinding step allowed us to optimize the catalysts textural properties, with respectively the obtention of a microcrystalline material, a drastic reduction of crystal size to a nanometric scale along with formation of dense particles and then a significant increase of specific surface area up to 50 m2·g−1 by particles deagglomeration. The reactive grinding sequence presented here also deeply impacted the redox properties of LaCoO3 catalysts, leading to increased performances in the toluene total oxidation reaction (SSR < HEBM < LEBM). A special care was paid to the impact of Fe contamination over grinding steps and time, on redox and catalytic properties of LaCoO3 samples.Lire moins >
Lire la suite >Perovskites are well known materials that are considered as viable alternative to noble metal-based catalysts in the environmental field. To be competitive, major issues such as unattractive textural properties and lower intrinsic activities than those of noble metal counterparts must be first addressed. On the other hand, reactive grinding is a versatile method to efficiently synthesize materials with improved textural properties, depending on the sequence and parameters. LaCoO3 perovskites were synthesized by a three-step reactive grinding top-down process: (i) solid-state reaction – SSR; (ii) high energy ball milling – HEBM; (iii) low energy ball milling – LEBM. The physicochemical properties evolution of perovskite materials over the reactive grinding process was investigated by XRD, N2-physisorption, ICP-OES, XPS, H2-TPR, O2-TPD and OIE, while their catalytic performances were evaluated for the toluene total oxidation reaction in dry and wet conditions. Each successive reactive grinding step allowed us to optimize the catalysts textural properties, with respectively the obtention of a microcrystalline material, a drastic reduction of crystal size to a nanometric scale along with formation of dense particles and then a significant increase of specific surface area up to 50 m2·g−1 by particles deagglomeration. The reactive grinding sequence presented here also deeply impacted the redox properties of LaCoO3 catalysts, leading to increased performances in the toluene total oxidation reaction (SSR < HEBM < LEBM). A special care was paid to the impact of Fe contamination over grinding steps and time, on redox and catalytic properties of LaCoO3 samples.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois
CNRS
Centrale Lille
ENSCL
Univ. Artois
Collections :
Équipe(s) de recherche :
Remédiation et matériaux catalytiques (REMCAT)
Date de dépôt :
2024-05-06T23:32:10Z
2024-05-21T09:35:16Z
2024-05-21T09:35:16Z