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ECS Meeting Abstracts, 12(MA2009-02), p. 1224-1224, 2009

DOI: 10.1149/ma2009-02/12/1224

The Electrochemical Society, ECS Transactions, 2(25), p. 1573-1582, 2009

DOI: 10.1149/1.3205693

The Electrochemical Society, Journal of The Electrochemical Society, 10(157), p. B1499

DOI: 10.1149/1.3474223

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Redox Properties of Ordered Macroporous Ce–Zr Mixed Oxides

Journal article published in 2009 by Dino Tonti ORCID, Maria Jose Torralvo, Eduardo Enciso, Lidia Martinez ORCID, Elisa Roman, Jesus Sanz
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

In this contribution finely textured three-dimensionally ordered macroporous (3DOM) mixed oxides of composition Zr0.6Ce0.4O2 were prepared by the inverse opal technique. By using thermal analysis and photoelectron spectroscopy the oxygen storage and the redox response to different environments has been investigated. Multiple high temperature oxidation-reduction cycles decrease the initial high sensitivity of the surface oxidation state of Ce to the environment. This has been ascribed to the development of Ce(III) phases. Finally, we present a simple analysis of XPS data that allow the detection of surface inhomogeneities on Ce-containing oxides. We show that phase segregation can produce chemically heterogeneous surfaces.