Influence of preparation methods of LaCoO3 on the catalytic performances in the decomposition of N2O

Dacquin, Jean‐Philippe; Lancelot, Christine; Dujardin, Christophe; Costa, Patrick Da; Djéga‐Mariadassou, Gérald; Beaunier, Patricia; Kaliaguine, Serge; Vaudreuil, Sébastien; Royer, Sébastien; Granger, Pascal

doi:10.1016/j.apcatb.2009.06.032

Cited by 86 publications

(62 citation statements)

References 30 publications

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“…It seems obvious that NO inhibits the conversion of N 2 O at low temperature on LaCoO 3 . This behavior seems in correct agreement with previous observations relating this effect to a significant production of NO 2 in this temperature range with subsequent stabilization of strongly chemisorbed nitrate species [16]. On the other hand, the rate of N 2 O conversion taking place on LaCoO 3 at higher temperature is insensitive to change in NO concentration from 0.5 to 5 vol% except above the light-off temperature since a slight improvement is discernible.…”

Section: In the Presence Of 5 Vol% Nosupporting

confidence: 89%

“…Hence, it is possible to tune the bulk and surface properties of perovskite by incorporation of appropriate promoters according to the selected applications. Our previous investigations showed the potential interest of LaCoO 3 in the catalytic decomposition of N 2 O from nitric acid plants [16]. It was suggested that oxygen mobility governs the catalytic properties with in situ formation of anionic vacancies at high temperature which can be potentially active for further adsorption and decomposition of N 2 O.…”

Section: Introductionmentioning

confidence: 99%

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Surface reconstructions of LaCo1−xFexO3 at high temperature during N2O decomposition in realistic exhaust gas composition: Impact on the catalytic properties

Cordier

Berrier

et al. 2013

Applied Catalysis B: Environmental

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Section: In the Presence Of 5 Vol% Nosupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Surface reconstructions of LaCo1−xFexO3 at high temperature during N2O decomposition in realistic exhaust gas composition: Impact on the catalytic properties

Cordier

Berrier

et al. 2013

Applied Catalysis B: Environmental

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“…Up to now, many catalytic systems such as noble metals [5,6,7], metal oxides [8,9,10], ion-exchanged zeolites, calcined hydrotalcites [ [11,12,13], mesoporous silicas [14,15] were investigated for the low temperature deN 2 O reaction. One of the simple promising generic systems exhibiting high catalytic activity in this reaction is cobalt spinel [16,17,18,19,20], which can be additionally modified by structural [21,22,23,24] and surface donation [24,25,26,27,28] …”

Section: Introductionmentioning

confidence: 99%

Strong dispersion effect of cobalt spinel active phase spread over ceria for catalytic N2O decomposition: The role of the interface periphery

Grzybek

Stelmachowski

Gudyka

et al. 2016

Applied Catalysis B: Environmental

103

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dispersion effect of cobalt spinel active phase spread over ceria for catalytic N2O decomposition: the role of the interface periphery, Applied Catalysis B, Environmental http://dx.doi.org/10. 1016/j.apcatb.2015.07.027 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. The catalytic tests in deN 2 O reaction revealed that the 10 wt.% of cobalt spinel in supported system is able to reproduce the activity of bare Co 3 O 4 catalyst. However, it was found that the catalyst with the lowest content of Co 3 O 4 equal to 1 wt.% exhibits the highest apparent reaction rate per mass of the spinel active phase. The observed activity was explained basing on the transmission electron microscopy analysis in terms of the dispersion of spinel phase over ceria support. A simple model that accounts for the observed strong dispersion effect is proposed. It consists in a two-step mechanism, where N 2 O is dissociated on the spinel nanograins and the resultant oxygen species are preferentially recombined at the Co 3 O 4 /CeO 2 interface periphery.

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“…33 34 In particular, single, mixed, or supported metal oxides have attracted much attention due to their low cost compared with precious metal catalysts. [35][36][37][38][39][40][41][42][43] However, the catalytic efficiency still needs to be improved, and to the best of our knowledge, catalytic decomposition of N 2 O on ordered crystalline mesoporous metal oxides has not been reported. Herein, we first screened the catalytic activities of a series of mesoporous metal oxides developed previously, 31 and then focused in more detail on the influence of preparation details of the most active Co 3 O 4 catalyst on the catalytic activity in N 2 O decomposition.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Decomposition of N<SUB>2</SUB>O on Ordered Crystalline Metal Oxides

Ren²,

Lu³

et al. 2013

j. nanosci. nanotech.

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The synthesis of mesoporous metal oxides using mesoporous silicas or carbons as hard templates has attracted growing interest recently, but the catalytic application of mesoporous metal oxides has not been studied sufficiently. In addition, few publications have compared the catalytic performance of a series of mesoporous metal oxides in the same reaction, and little is known about the influence of preparation details of mesoporous metal oxides on catalytic activity. Herein, ordered crystalline mesoporous metal oxides (i.e., CeO2, Co3O4, Cr2O3, CuO, alpha-Fe2O3, beta-MnO2, Mn2O3, Mn3O4, NiO) prepared using mesoporous SiO2 (KIT-6) as a hard template were tested in the decomposition of N2O, an environmental pollutant, and the catalytic performance was compared with that of commercial metal oxides with low surface areas. In particular, mesoporous Co3O4, beta-MnO2, and NiO showed high N2O conversions at 350 degrees C. The influence of preparation parameters of mesoporous Co3O4 on catalytic activity was then studied in more detail. Mesoporous Co3O4 samples with different pore sizes and wall thicknesses were prepared using KIT-6 synthesized under different hydrothermal or calcination temperatures. Interestingly, the catalytic activities of different mesoporous Co3O4 samples were found to be influenced by these preparation details.

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Influence of preparation methods of LaCoO3 on the catalytic performances in the decomposition of N2O

Cited by 86 publications

References 30 publications

Surface reconstructions of LaCo1−xFexO3 at high temperature during N2O decomposition in realistic exhaust gas composition: Impact on the catalytic properties

Surface reconstructions of LaCo1−xFexO3 at high temperature during N2O decomposition in realistic exhaust gas composition: Impact on the catalytic properties

Strong dispersion effect of cobalt spinel active phase spread over ceria for catalytic N2O decomposition: The role of the interface periphery

Catalytic Decomposition of N<SUB>2</SUB>O on Ordered Crystalline Metal Oxides

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