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Oxygen storage capacity of CuMO2 (M = Al, Fe, Mn, Ga) with a delafossite-type structure

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Abstract.
Delafossite-type CuMO2 (M: trivalent cation) compounds were synthesized and found to exhibit oxygen
storage capacity under oxidation/reduction cycle. The oxygen storage capacity values of CuFeO2 and
CuMnO2 at lower temperature were larger than those of CuAlO2, CuGaO2- and CeO2-based materials. The
large OSC includes an oxygen uptake at low temperature attributed to formation of metallic Cu by
decomposition of the delafossite phase for CuFeO2 and CuMnO2. In the case of CuAlO2, which remained
without decomposition below 800 oC, the oxygen uptake increased with temperature up to 0.13 mol-O/
mol-CuMO2. The stability of the delafossite-type CuMO2 against oxidation/reduction cycle is affected by
M3+. In this study, it was found that the oxygen storage behavior of CuMO2 can be controlled by a
combination of Cu and M ions.

Keywords: Oxygen storage capacity, Delafossite, Oxidation/reduction cycle

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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) 183–188

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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