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Issue 12, 2003
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Structural changes of Ce–Pr–O oxides in hydrogen: a study by in situ X-ray diffraction and Raman spectroscopy

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Abstract

Ce–Pr–O mixed oxides prepared by coprecipitation and calcined at 1173 K reveal a non stoichiometric structure with oxygen vacancies in the bulk. In situ XRD and Raman spectroscopy were used to investigate these properties simultaneously and identified a thermal expansion coefficient twice as high as that of pure ceria at room temperature and the presence of a Raman band at 560 cm−1, characteristic of the oxygen vacancies. These results confirm that praseodymium atoms are able to induce oxygen mobility in the bulk at 298 K. This is due to a structure containing a high number of anionic vacancies pre-existing at ambient temperature.

Graphical abstract: Structural changes of Ce–Pr–O oxides in hydrogen: a study by in situ X-ray diffraction and Raman spectroscopy

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Publication details

The article was received on 12 Jun 2003, accepted on 11 Sep 2003 and first published on 02 Oct 2003


Article type: Paper
DOI: 10.1039/B306726B
Citation: J. Mater. Chem., 2003,13, 3017-3020
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    Structural changes of Ce–Pr–O oxides in hydrogen: a study by in situ X-ray diffraction and Raman spectroscopy

    S. Rossignol, F. Gérard, D. Mesnard, C. Kappenstein and D. Duprez, J. Mater. Chem., 2003, 13, 3017
    DOI: 10.1039/B306726B

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