Effect of Mn loading onto hydroxyapatite ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Effect of Mn loading onto hydroxyapatite supported Mn catalysts for toluene removal: Contribution of PCA assisted ToF-SIMS
Auteur(s) :
Chlala, Dayan [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Laboratoire de Chimie Physique des Matériaux [LCPM]
Constant, Anne [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Giraudon, Jean-Marc [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Labaki, Madona [Auteur]
Laboratoire de Chimie Physique des Matériaux [LCPM]
Lamonier, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Laboratoire de Chimie Physique des Matériaux [LCPM]
Constant, Anne [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Giraudon, Jean-Marc [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Labaki, Madona [Auteur]
Laboratoire de Chimie Physique des Matériaux [LCPM]
Lamonier, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Titre de la revue :
Catalysis Today
Numéro :
307
Pagination :
41-47
Éditeur :
Elsevier
Date de publication :
2018-06-01
ISSN :
0920-5861
Mot(s)-clé(s) en anglais :
Chemometrics
PCA
ToF-SIMS
Catalysis
Toluene
Total oxidation
PCA
ToF-SIMS
Catalysis
Toluene
Total oxidation
Discipline(s) HAL :
Chimie/Catalyse
Résumé en anglais : [en]
A series of hydroxyapatite (Hap; of ideal formula: Ca10(PO4)6(OH)2) supported MnOx materials (MnxHap; x = Mn wt.%:2.5, 5.0, 10, 20, and 30 based on MnO2) has been tested prepared by wet impregnation using manganese (II) ...
Lire la suite >A series of hydroxyapatite (Hap; of ideal formula: Ca10(PO4)6(OH)2) supported MnOx materials (MnxHap; x = Mn wt.%:2.5, 5.0, 10, 20, and 30 based on MnO2) has been tested prepared by wet impregnation using manganese (II) nitrate tetrahydrate as metal precursor followed by calcination at 400 °C in toluene total oxidation (800 ppmv in dry air) at 220 °C for 40 h. It was shown that the fresh catalysts can be ranked as follow by decreasing activity: Mn5Hap > Mn2.5Hap > Mn10Hap > Mn20Hap > Mn30Hap and that Mn10Hap exhibited the best resistance to deactivation. Investigation of the surface state of the fresh and used MnxHap catalysts has been performed using X-ray photoelectron spectroscopy (XPS) and principal component analysis (PCA) assisted static time-of-flight secondary-ion mass spectrometry (ToF-SIMS). Based on the XPS results a Mn speciation scheme can be proposed: initial incorporation of Mn2+ into Hap (2.5 wt% Mn) followed by additional well dispersed oxidized manganese species on Hap (5–10 wt% Mn) to end up with the formation Mn2O3/ε-MnO2 particles detected by XRD (20–30 wt% Mn). Principal components analysis (PCA) has been applied to the (+) ToF-SIMS spectra taking into account of all the detected significant manganese containing secondary ions. PC1 (75% of the variance) discriminates well the fresh and used samples in a similar way and was related to the surface manganese content. The resulting volcano plot obtained by plotting PC2 (12% of the variance) as a function of the resistance to deactivation discriminates the catalysts in the same way as depicted in the PC2 score plot. Consequently also taking into account of the PC2 loading plot it was suggested that a redispersion of Mnn+/Ca2+ takes place with time on stream preferentially for MnxHap (x = 5–10 wt%) improving their catalyst stability.Lire moins >
Lire la suite >A series of hydroxyapatite (Hap; of ideal formula: Ca10(PO4)6(OH)2) supported MnOx materials (MnxHap; x = Mn wt.%:2.5, 5.0, 10, 20, and 30 based on MnO2) has been tested prepared by wet impregnation using manganese (II) nitrate tetrahydrate as metal precursor followed by calcination at 400 °C in toluene total oxidation (800 ppmv in dry air) at 220 °C for 40 h. It was shown that the fresh catalysts can be ranked as follow by decreasing activity: Mn5Hap > Mn2.5Hap > Mn10Hap > Mn20Hap > Mn30Hap and that Mn10Hap exhibited the best resistance to deactivation. Investigation of the surface state of the fresh and used MnxHap catalysts has been performed using X-ray photoelectron spectroscopy (XPS) and principal component analysis (PCA) assisted static time-of-flight secondary-ion mass spectrometry (ToF-SIMS). Based on the XPS results a Mn speciation scheme can be proposed: initial incorporation of Mn2+ into Hap (2.5 wt% Mn) followed by additional well dispersed oxidized manganese species on Hap (5–10 wt% Mn) to end up with the formation Mn2O3/ε-MnO2 particles detected by XRD (20–30 wt% Mn). Principal components analysis (PCA) has been applied to the (+) ToF-SIMS spectra taking into account of all the detected significant manganese containing secondary ions. PC1 (75% of the variance) discriminates well the fresh and used samples in a similar way and was related to the surface manganese content. The resulting volcano plot obtained by plotting PC2 (12% of the variance) as a function of the resistance to deactivation discriminates the catalysts in the same way as depicted in the PC2 score plot. Consequently also taking into account of the PC2 loading plot it was suggested that a redispersion of Mnn+/Ca2+ takes place with time on stream preferentially for MnxHap (x = 5–10 wt%) improving their catalyst stability.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Autre(s) projet(s) ou source(s) de financement :
Chevreul Institute (FR 2638)
Ministère de l’Enseignement Supérieur et de la Recherche
Région Nord Pas-de-Calais
FEDER
Project PHC CEDRE 2015 N° 32933QE
Lebanese CNRS project N°01-08-15
Ministère de l’Enseignement Supérieur et de la Recherche
Région Nord Pas-de-Calais
FEDER
Project PHC CEDRE 2015 N° 32933QE
Lebanese CNRS project N°01-08-15
Établissement(s) :
ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Collections :
Équipe(s) de recherche :
Catalyse pour l’énergie (CATEN)
Remédiation et matériaux catalytiques (REMCAT)
Remédiation et matériaux catalytiques (REMCAT)
Date de dépôt :
2019-09-25T14:37:51Z
2021-02-26T12:33:46Z
2023-11-14T11:31:23Z
2023-12-01T15:29:41Z
2021-02-26T12:33:46Z
2023-11-14T11:31:23Z
2023-12-01T15:29:41Z
Fichiers
- Catalysis Today 307 2018 41.pdf
- Version finale acceptée pour publication (postprint)
- Accès libre
- Accéder au document