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Catalysts 2015, 5(2), 851-867; doi:10.3390/catal5020851

Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation

1
Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), Université du Littoral Côte d'Opale (ULCO), 145 avenue Maurice Schumann, 59140 Dunkerque, France
2
Laboratoire de Réactivité de Surface (LRS), CNRS UMR 7197, Sorbonne Université, Université Pierre et Marie CURIE (UPMC), 4 place Jussieu, 75005 Paris, France
*
Authors to whom correspondence should be addressed.
Academic Editor: Jean-François Lamonier
Received: 27 February 2015 / Revised: 28 April 2015 / Accepted: 4 May 2015 / Published: 15 May 2015
(This article belongs to the Special Issue Catalytic Removal of Volatile Organic Compounds)
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Abstract

Co6Al2HT hydrotalcite-like compounds were synthesized by three different methods: co-precipitation, microwaves-assisted and ultrasound-assisted methods. The mixed oxides obtained after calcination were studied by several techniques: XRD, TEM, H2-TPR and XPS. They were also tested as catalysts in the reaction of total oxidation of toluene. The physico-chemical studies revealed a modification of the structural characteristics (surface area, morphology) as well as of the reducibility of the formed mixed oxides. The solid prepared by microwaves-assisted synthesis was the most active. Furthermore, a relationship between the ratio of Co2+ on the surface, the reducibility of the Co-Al mixed oxide and the T50 in toluene oxidation was demonstrated. This suggests a Mars Van Krevelen mechanism for toluene total oxidation on these catalysts. View Full-Text
Keywords: mixed oxide; LDH; microwaves; ultrasound; toluene; catalytic oxidation mixed oxide; LDH; microwaves; ultrasound; toluene; catalytic oxidation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Genty, E.; Brunet, J.; Poupin, C.; Casale, S.; Capelle, S.; Massiani, P.; Siffert, S.; Cousin, R. Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation. Catalysts 2015, 5, 851-867.

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