Mixed Oxides Issued from Hydrotalcite Precursors for Toluene and CO Total Oxidation: Comparison of Preparation Method

Genty, Éric; Serhal, Cynthia Abou; Khawaja, Rebecca El; Dib, Hadi; Labaki, Madona; Mallard, Isabelle; Poupin, Christophe; Siffert, Stéphane; Cousin, Renaud

doi:10.1166/jnn.2020.16978

Cited by 6 publications

(4 citation statements)

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“…Figure 2 shows the H 2 ‐TPR profiles representing the active metal phase reducibility. According to the literature, Mg 6 Al 2 ‐O does not show any reduction in the studied temperature range [38–40] . Therefore, the contribution of magnesium oxides will not be considered, and the manganese species′ reducibility will solely be evaluated.…”

Section: Resultsmentioning

confidence: 99%

“…According to the literature, Mg 6 Al 2 -O does not show any reduction in the studied temperature range. [38][39][40] Therefore, the contribution of magnesium oxides will not be considered, and the manganese species' reducibility will solely be evaluated. The reduction profiles of Mn-based materials show an overlap of three reduction peaks (peaks 1, 2, and 3).…”

Section: Characterization Of Mn X Mg 6-x Al 2 -O Catalystsmentioning

confidence: 99%

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Optimization of Mn‐Mg‐Al Mixed Oxides Composition on their Activity towards the Total Oxidation of Aromatic and Oxygenated VOCs

et al. 2023

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A series of mixed oxides (Mn-Mg-Al) is prepared by coprecipitation via a hydrotalcite route with different manganese ratios. Structural, textural, and redox properties are studied by XRD, N 2 -sorption, H 2 -TPR, and XPS techniques. Mn x Mg 6-x Al 2 -O mixed oxides (with 0 � x � 6) are tested in the total oxidation of ethanol and toluene, two probe molecules representing respectively oxygenated and aromatic VOCs. Catalysts with higher manganese contents have shown the best catalytic performance for the oxidation of both ethanol and toluene. The surface activity of the materials is mainly related to the presence of manganese species in three different oxidation states (+ II, + III, and + IV) in the bulk and on the material's surface. Since high Mn-content catalysts showed similar physicochemical properties and catalytic activity, Mn 4 Mg 2 -O is selected as the optimal composition of these materials. Furthermore, its aging test is compared to that of noble metalbased commercial catalysts (Pd/γ-Al 2 O 3 ).

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Mn X Mg 6-x Al 2 -O Catalystsmentioning

confidence: 99%

Optimization of Mn‐Mg‐Al Mixed Oxides Composition on their Activity towards the Total Oxidation of Aromatic and Oxygenated VOCs

et al. 2023

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“…Likewise, the same authors worked on the UAS of another LDH composition (Mg-Al) under the same conditions [51]. Those materials were used as catalysts for total oxidation of toluene and CO. An increment of 51% in specific surface area of hydrotalcite precursors was observed.…”

Section: Total Oxidation Of Volatile Organic Compoundsmentioning

confidence: 99%

Review on the contribution of ultrasounds in layered double hydroxides synthesis and in their performances

Kalawoun,

Obeid,

Ciotonea

et al. 2023

Comptes Rendus. Chimie

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Layered double hydroxides (LDHs) are promising because of some of their several interesting characteristics. LDHs can be synthesized using different preparation methods. The application of ultrasounds (US) in the preparation method leads to reduced synthesis times and better dispersion of particles characterized by small size and narrower particle size distribution. Consequently, the specific surface area is higher in US-prepared samples compared to materials prepared by classical methods. These modified characteristics are responsible for improving the performances of LDHs used as catalyst precursors, adsorbents of dyes and heavy metals, fire suppressants, and other applications.

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“…The synthesis method has a dramatic influence on the catalytic behaviors of mixed metal oxide catalysts. [281][282][283] For example, Castano et al 284 synthesized Co-Mn mixed oxide catalysts via the auto-combustion and co-precipitation methods and explored their catalytic performance for toluene and 2-propanol oxidation. An enhancement in activity was observed for the Co-Mn catalyst obtained with the coprecipitation method, which was assigned to the cooperation effect between Co and Mn oxides, resulting in the joint participation of the O ads and the O latt species.…”

Section: Mixed Metal Oxide Catalystsmentioning

confidence: 99%

Recent progress on catalysts for catalytic oxidation of volatile organic compounds: a review

Liu

Shi

et al. 2022

Catal. Sci. Technol.

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Mixed Oxides Issued from Hydrotalcite Precursors for Toluene and CO Total Oxidation: Comparison of Preparation Method

Cited by 6 publications

References 0 publications

Optimization of Mn‐Mg‐Al Mixed Oxides Composition on their Activity towards the Total Oxidation of Aromatic and Oxygenated VOCs

Optimization of Mn‐Mg‐Al Mixed Oxides Composition on their Activity towards the Total Oxidation of Aromatic and Oxygenated VOCs

Review on the contribution of ultrasounds in layered double hydroxides synthesis and in their performances

Recent progress on catalysts for catalytic oxidation of volatile organic compounds: a review

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