FT-IR and EPR spectroscopic analysis of La1−xCexCoO3 perovskite-like catalysts for NO reduction by CO

Forni, L.; Oliva, Cesare; Barzetti, Tommy; Selli, Elena; Ezerets, A.M.; Вишняков, А.В.

doi:10.1016/s0926-3373(96)00089-6

Cited by 47 publications

(23 citation statements)

References 41 publications

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“…NO dissociatively adsorbs on a surface oxygen vacancy (□) (Equation (11)). The recombination of two adsorbed nitrogen species leads to the formation of N 2 (Equation (12)) while parallel pathways produce undesired N 2 O (Equation (13)) and isocyanate species (Equation (14)) [57]. The oxygen vacancy is restored by the reducing species in the gas phase (e.g., CO (Equation (15))).…”

Section: Reaction Mechanismsmentioning

confidence: 99%

Structured Perovskite-Based Catalysts and Their Application as Three-Way Catalytic Converters—A Review

et al. 2014

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Automotive Three-Way Catalysts (TWC) were introduced more than 40 years ago. Despite that, the development of a sustainable TWC still remains a critical research topic owing to the increasingly stringent emission regulations together with the price and scarcity of precious metals. Among other material classes, perovskite-type oxides are known to be valuable alternatives to conventionally used TWC compositions and have demonstrated to be suitable for a wide range of automotive applications, ranging from TWC to Diesel Oxidation Catalysts (DOC), from NO x Storage Reduction catalysts (NSR) to soot combustion catalysts. The interest in these catalysts has been revitalized in the past ten years by the introduction of the concept of catalyst regenerability of perovskite-based TWC, which is in principle well applicable to other catalytic processes as well, and by the possibility to reduce the amounts of critical elements, such as precious metals without seriously lowering the catalytic performance. The aim of this review is to show that perovskite-type oxides have the potential to fulfil the requirements (high activity, stability, and possibility to be included into structured catalysts) for implementation in TWC.

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Section: Reaction Mechanismsmentioning

confidence: 99%

Structured Perovskite-Based Catalysts and Their Application as Three-Way Catalytic Converters—A Review

et al. 2014

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“…Many studies on perovskite catalysts have been reported [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: History Of Perovskite Catalystmentioning

confidence: 99%

LaFePdO3 perovskite automotive catalyst having a self-regenerative function

Tanaka¹,

Tan²,

Uenishi³

et al. 2006

Journal of Alloys and Compounds

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“…In this manner, one can eliminate the costly steps of purchasing, transporting and storing the reductant. The vast majority of the catalysts reported for the NO + CO reaction are supported platinum group metals (Pt, Pd, Rh, Ir) [3][4][5], perovskite type oxides [6,7], and supported copper oxide [8]. Most of the reported catalysts require a high working temperature (773-873 K) to get reasonably high NO conversions.…”

Section: Introductionmentioning

confidence: 99%

Selective Reduction of NO with CO Over Titania Supported Transition Metal Oxide Catalysts

Sreekanth

Smirniotis

2007

Catal Lett

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A series of transition metal oxides promoted titania catalysts (MO x /TiO 2 ; M = Cr, Mn, Fe, Ni, Cu) were prepared by wet impregnation method using dilute solutions of metal nitrate precursors. The catalytic activity of these materials was evaluated for the selective catalytic reduction (SCR) of NO with CO as reductant in the presence of excess oxygen (2 vol.%). Among various promoted oxides, the MnO x /TiO 2 system showed very promising catalytic activity for NO + CO reaction, giving higher than 90% NO conversion over a wide temperature window and at high space velocity (GHSV) of 50,000 h -1 . It is remarkable to note that the catalytic activity increased with oxygen, up to 4 vol.%, under these conditions leading primarily to nitrogen. Our TPR studies revealed the presence of mixed oxidation states of manganese on the catalyst surface. Characterization results indicated that the surface manganese oxide phase and the redox properties of the catalyst play an important role in final catalytic activity.

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FT-IR and EPR spectroscopic analysis of La1−xCexCoO3 perovskite-like catalysts for NO reduction by CO

Cited by 47 publications

References 41 publications

Structured Perovskite-Based Catalysts and Their Application as Three-Way Catalytic Converters—A Review

Structured Perovskite-Based Catalysts and Their Application as Three-Way Catalytic Converters—A Review

LaFePdO3 perovskite automotive catalyst having a self-regenerative function

Selective Reduction of NO with CO Over Titania Supported Transition Metal Oxide Catalysts

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