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Preparation, characterization, and catalytic properties of NdSrCu1-xCoxO4-d and Sm 1.8Ce0.2Cu1-xCoxO4+d (x = 0, 0.2 and 0.4) for methane combustion

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Abstract.
Single-phase perovskite-like oxides NdSrCu1-xCoxO4-d and Sm 1.8Ce0.2Cu1-xCoxO4+d (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-d and Sm 1.8Ce0.2Cu1-xCoxO4+d catalysts possess T and T0 crystal structures, respectively.
There are Cu3+/Cu2+ ions and oxygen vacancies in the former and Cu2+/Cu+ ions and extra (overstoichiometric)
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-d and Sm 1.8Ce0.2Cu1-xCoxO4+d catalysts.

Keywords: Perovskite-like oxide catalysts, NdSrCu1-xCoxO4-d, Sm 1.8Ce0.2Cu1-xCoxO4+d, Methane combustion, Oxygen nonstoichiometry.

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Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Catalysis B: Environmental 89 (2009) 87–96

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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