Reaction of formaldehyde over birnessite ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Reaction of formaldehyde over birnessite catalyst: A combined XPS and ToF-SIMS study
Auteur(s) :
Selvakumar, S. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Trentesaux, Martine [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Batra, V.S. [Auteur]
Giraudon, Jean-Marc [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lamonier, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Trentesaux, Martine [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Batra, V.S. [Auteur]
Giraudon, Jean-Marc [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lamonier, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Titre de la revue :
Applied Catalysis B: Environmental
Numéro :
223
Pagination :
192-200
Éditeur :
Elsevier
Date de publication :
2018-04
Mot(s)-clé(s) en anglais :
Formaldehyde
Birnessite
Catalytic oxidation
X-Ray photoelectron spectroscopy
Time of flight secondary ion mass spectrometry
Birnessite
Catalytic oxidation
X-Ray photoelectron spectroscopy
Time of flight secondary ion mass spectrometry
Discipline(s) HAL :
Chimie/Catalyse
Résumé en anglais : [en]
Birnessite with very high surface area (>180 m2 g−1) has been prepared by oxidation of Mn(NO3)2 with H2O2 in KOH solution. The catalytic performance of this free noble metal based material for the formaldehyde (HCHO) ...
Lire la suite >Birnessite with very high surface area (>180 m2 g−1) has been prepared by oxidation of Mn(NO3)2 with H2O2 in KOH solution. The catalytic performance of this free noble metal based material for the formaldehyde (HCHO) selective conversion into CO2 is excellent. Therefore this birnessite material has been selected for X-ray photoelectron spectroscopy (XPS) analysis in combination with time-of-flight secondary ion mass spectroscopy (ToF-SIMS) study to understand the mechanistic interaction between adsorbate and adsorbent. Thermo-desorption of formaldehyde saturated birnessite has been conducted under argon atmosphere, using a catalysis cell allowing the monitoring of the birnessite surface modification. XPS study shows (i) the partial oxidation of formaldehyde at room temperature through the formate species formation and manganese species reduction and (ii) the generation of carbonate species with temperature. ToF-SIMS analyses gave more insight in the kind of cations from birnessite interacting with adsorbed molecules: formate ions interact with manganese and potassium ions while carbonate ions interact only with potassium ions. Formate oxidation takes place on Mn ions to give COx(g) species while formate ions readily decompose on K+ sites at higher temperature.Lire moins >
Lire la suite >Birnessite with very high surface area (>180 m2 g−1) has been prepared by oxidation of Mn(NO3)2 with H2O2 in KOH solution. The catalytic performance of this free noble metal based material for the formaldehyde (HCHO) selective conversion into CO2 is excellent. Therefore this birnessite material has been selected for X-ray photoelectron spectroscopy (XPS) analysis in combination with time-of-flight secondary ion mass spectroscopy (ToF-SIMS) study to understand the mechanistic interaction between adsorbate and adsorbent. Thermo-desorption of formaldehyde saturated birnessite has been conducted under argon atmosphere, using a catalysis cell allowing the monitoring of the birnessite surface modification. XPS study shows (i) the partial oxidation of formaldehyde at room temperature through the formate species formation and manganese species reduction and (ii) the generation of carbonate species with temperature. ToF-SIMS analyses gave more insight in the kind of cations from birnessite interacting with adsorbed molecules: formate ions interact with manganese and potassium ions while carbonate ions interact only with potassium ions. Formate oxidation takes place on Mn ions to give COx(g) species while formate ions readily decompose on K+ sites at higher temperature.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Collections :
Équipe(s) de recherche :
Remédiation et matériaux catalytiques (REMCAT)
Date de dépôt :
2019-09-25T14:06:01Z
2021-03-04T10:44:17Z
2023-03-23T13:52:16Z
2023-03-24T11:00:27Z
2021-03-04T10:44:17Z
2023-03-23T13:52:16Z
2023-03-24T11:00:27Z
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