Extent of the participation of lattice oxygen from γ-MnO2 in VOCs total oxidation: Influence of the VOCs nature

Cellier, Caroline; Ruaux, Valérie; Lahousse, C.; Grange, Paul; Gaigneaux, Éric M.

doi:10.1016/j.cattod.2006.05.033

Cited by 78 publications

(39 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nanostructured mixed valence oxides (such as Mn 3 O 4 ) were shown to effectively catalyze the oxidation of formaldehyde at room temperature [16]. In most of the cases mentioned here, low temperature oxidation of formaldehyde likely takes place via a Mars-van Krevelen (MvK) mechanism, as is usually described for high temperature catalysis, in 4 which lattice oxygen atoms from the catalyst participate in the initial step of the reaction, and are subsequently replenished by reduction of atmospheric O 2 MnO [17][18]:…”

Section: C) Such Enhanced Catalyticmentioning

confidence: 89%

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Sidheswaran

Destaillats

Sullivan

et al. 2011

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

Manganese oxide-based catalysts have been synthesized and tested for the abatement of formaldehyde, an ubiquitous indoor pollutant which is not effectively eliminated by most air cleaning technologies. Catalysts were prepared by co-precipitation of MnSO 4 and NaMnO 4 followed by curing at 100, 200 and 400 0 C. Characterization was performed using X-ray diffractometry (XRD), porosimetry, scanning electron microscopy (SEM), and inductively coupled plasma -mass spectrometry (ICP-MS). Diffractograms Research Highlights:). Due to the relatively low costs of synthesis and deployment of these catalysts, this technology is promising for maintaining low indoor formaldehyde levels, enabling energy-saving reductions of building ventilation rates.Synthesis of manganese oxide-based catalysts to remove indoor formaldehyde; High surface area and porosity; Small crystal size; Complete mineralization of formaldehyde;High activity maintained after processing up to 400 m 3 of formaldehyde-laden air.

show abstract

Section: C) Such Enhanced Catalyticmentioning

confidence: 89%

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Sidheswaran

Destaillats

Sullivan

et al. 2011

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

show abstract

“…Therefore, it is probable that the catalytic activity may be related to the structure and the manganese species on the catalyst surface (and consequently with the AOS). This assumption seems reasonable because it has been suggested that the oxidation of organic molecules with manganese oxide catalysts at low temperatures may involve a Mars and van Krevelen (MVK) mechanism which includes a redox cycle on the catalyst surface with the participation of the lattice oxygen from the oxide [25,29,30]. Following the MVK concept, it could thus be predicted that oxides with the highest oxidation state would have the highest oxidation activities, because they have more oxygen atoms that can be used for the VOC oxidation.…”

Section: Screening Testsmentioning

confidence: 98%

Synthesis and Characterization of Manganese Oxide Catalysts for the Total Oxidation of Ethyl Acetate

et al. 2009

View full text Add to dashboard Cite

Manganese oxide catalysts were synthesized by direct reaction between manganese acetate and permanganate ions, under acidic and reflux conditions. Parameters such as pH (2.0-4.5) and template cation (Na ? , K ? and Cs ? ) were studied. A pure cryptomelane-type manganese oxide was synthesized under specific conditions, and it was found that the template cation plays an important role on the formation of this kind of structure. Cryptomelane was found to be a very active oxidation catalyst, converting ethyl acetate into CO 2 at low temperatures (220°C). This catalyst is very stable at least during 90 h of reaction and its performance is not significantly affected by the presence of water vapour or CO 2 in the feed stream. The catalyst performance can be improved by the presence of small amounts of Mn 3 O 4 .

show abstract

“…At high temperature, oxidation of hydrocarbon over transition metal oxide is often assumed to involve the participation of lattice oxygen (26)(27)(28)(29). We suggest that above 300°C, the promotion effect of gold is due to substitutional Au 3+ reducing the Ce-O bond strength and hence increasing the rate of butane oxidation.…”

Section: The Importance Of Cationic Gold Inmentioning

confidence: 99%

Effect of the oxidation state of gold on the complete oxidation of isobutane on Au/CeO2 catalysts

Yinga

Wang

et al. 2010

Gold Bull

View full text Add to dashboard Cite

. Au/CeO 2 catalysts showed low-temperature isobutane oxidation activity with maximum conversion at 150-180°C. Ex-situ XPS results demonstrated that the low temperature isobutane oxidation activity was closely related to the content of Au + which we interpreted as surface gold oxide formed under reaction conditions. Isobutane oxidation activity associated with ceria at temperature above 300°C was enhanced by substitutional Au 3+ .

show abstract

Extent of the participation of lattice oxygen from γ-MnO2 in VOCs total oxidation: Influence of the VOCs nature

Cited by 78 publications

References 11 publications

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Quantitative room-temperature mineralization of airborne formaldehyde using manganese oxide catalysts

Synthesis and Characterization of Manganese Oxide Catalysts for the Total Oxidation of Ethyl Acetate

Effect of the oxidation state of gold on the complete oxidation of isobutane on Au/CeO2 catalysts

Contact Info

Product

Resources

About