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Preparation, characterization, and catalytic properties of NdSrCu1−xCoxO4−δ and Sm1.8Ce0.2Cu1−xCoxO4+δ (x = 0, 0.2 and 0.4) for methane combustion

Paper ID Volume ID Publish Year Pages File Format Full-Text
47837 46483 2009 10 PDF Available
Title
Preparation, characterization, and catalytic properties of NdSrCu1−xCoxO4−δ and Sm1.8Ce0.2Cu1−xCoxO4+δ (x = 0, 0.2 and 0.4) for methane combustion
Abstract

Single-phase perovskite-like oxides NdSrCu1−xCoxO4−δ and Sm1.8Ce0.2Cu1−xCoxO4+δ (x = 0, 0.2, and 0.4) were prepared using the citric acid complexing method coupled with ultrasonic treatment. We characterized the materials by a number of analytical techniques. It was found that the NdSrCu1−xCoxO4−δ and Sm1.8Ce0.2Cu1−xCoxO4+δ catalysts possess T and T′ crystal structures, respectively. There are Cu3+/Cu2+ ions and oxygen vacancies in the former and Cu2+/Cu+ ions and extra (over-stoichiometric) oxygen in the latter. We examined the catalytic activity of the materials for methane combustion. Methane conversion increased with a rise in the amount of nonstoichiometric oxygen over the two series of catalysts. It is concluded that oxygen nonstoichiometry and Cu3+/Cu2+ or Cu2+/Cu+ redox couples facilitate the oxidation of methane over the NdSrCu1−xCoxO4−δ and Sm1.8Ce0.2Cu1−xCoxO4+δ catalysts.

Keywords
Perovskite-like oxide catalysts; NdSrCu1−xCoxO4−δ; Sm1.8Ce0.2Cu1−xCoxO4+δ; Methane combustion; Oxygen nonstoichiometry
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Preparation, characterization, and catalytic properties of NdSrCu1−xCoxO4−δ and Sm1.8Ce0.2Cu1−xCoxO4+δ (x = 0, 0.2 and 0.4) for methane combustion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 89, Issues 1–2, 3 July 2009, Pages 87–96
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us