Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation
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...
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| Format: | Article |
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MDPI AG
2015-05-01
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| Series: | Catalysts |
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| Online Access: | http://www.mdpi.com/2073-4344/5/2/851 |
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| author | Eric Genty Julien Brunet Christophe Poupin Sandra Casale Sylvie Capelle Pascale Massiani Stéphane Siffert Renaud Cousin |
| author_facet | Eric Genty Julien Brunet Christophe Poupin Sandra Casale Sylvie Capelle Pascale Massiani Stéphane Siffert Renaud Cousin |
| author_sort | Eric Genty |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T10:50:29Z |
| format | Article |
| id | doaj.art-e22e9e45010448b1a90872eda6925cb8 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-04-12T10:50:29Z |
| publishDate | 2015-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-e22e9e45010448b1a90872eda6925cb82022-12-22T03:36:16ZengMDPI AGCatalysts2073-43442015-05-015285186710.3390/catal5020851catal5020851Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total OxidationEric Genty0Julien Brunet1Christophe Poupin2Sandra Casale3Sylvie Capelle4Pascale Massiani5Stéphane Siffert6Renaud Cousin7Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), Université du Littoral Côte d'Opale (ULCO), 145 avenue Maurice Schumann, 59140 Dunkerque, FranceUnité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), Université du Littoral Côte d'Opale (ULCO), 145 avenue Maurice Schumann, 59140 Dunkerque, FranceUnité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), Université du Littoral Côte d'Opale (ULCO), 145 avenue Maurice Schumann, 59140 Dunkerque, FranceLaboratoire de Réactivité de Surface (LRS), CNRS UMR 7197, Sorbonne Université, Université Pierre et Marie CURIE (UPMC), 4 place Jussieu, 75005 Paris, FranceUnité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), Université du Littoral Côte d'Opale (ULCO), 145 avenue Maurice Schumann, 59140 Dunkerque, FranceLaboratoire de Réactivité de Surface (LRS), CNRS UMR 7197, Sorbonne Université, Université Pierre et Marie CURIE (UPMC), 4 place Jussieu, 75005 Paris, FranceUnité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), Université du Littoral Côte d'Opale (ULCO), 145 avenue Maurice Schumann, 59140 Dunkerque, FranceUnité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, EA 4492), Université du Littoral Côte d'Opale (ULCO), 145 avenue Maurice Schumann, 59140 Dunkerque, FranceCo6Al2HT 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.http://www.mdpi.com/2073-4344/5/2/851mixed oxideLDHmicrowavesultrasoundtoluenecatalytic oxidation |
| spellingShingle | Eric Genty Julien Brunet Christophe Poupin Sandra Casale Sylvie Capelle Pascale Massiani Stéphane Siffert Renaud Cousin Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation Catalysts mixed oxide LDH microwaves ultrasound toluene catalytic oxidation |
| title | Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation |
| title_full | Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation |
| title_fullStr | Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation |
| title_full_unstemmed | Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation |
| title_short | Co-Al Mixed Oxides Prepared via LDH Route Using Microwaves or Ultrasound: Application for Catalytic Toluene Total Oxidation |
| title_sort | co al mixed oxides prepared via ldh route using microwaves or ultrasound application for catalytic toluene total oxidation |
| topic | mixed oxide LDH microwaves ultrasound toluene catalytic oxidation |
| url | http://www.mdpi.com/2073-4344/5/2/851 |
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