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Issue 2, 2011
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Novel redox reversible oxide, Sr-doped cerium orthovanadate to metavanadate

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Abstract

A-site substituted cerium metavanadates, Ce1−xSrxVO3, were synthesised by solid-state reactions from single-phase powders of the corresponding orthovanadates. All samples were found to exhibit an orthorhombic perovskite structure of space groupPnma (62) with a = 5.5181 (3), b = 7.7853 (2) and c = 5.5155 (4) Å for Ce0.85Sr0.15VO3. Conductivity measurements were performed in air and in dry 5% H2–Ar with conductivity values at 700 °C ranging from 0.1 to 2.5 S cm−1 with peaking at 6 S cm−1 in reduced atmosphere. X-Ray diffraction patterns and thermal analyses have shown that the reduction of Sr-doped CeVO3 from the equivalent orthovanadate is redox phase reversible without formation of parasitic phases while the undoped CeVO4 is not.

Graphical abstract: Novel redox reversible oxide, Sr-doped cerium orthovanadate to metavanadate

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Publication details

The article was received on 13 Aug 2010, accepted on 28 Sep 2010 and first published on 27 Oct 2010


Article type: Paper
DOI: 10.1039/C0JM02669G
Citation: J. Mater. Chem., 2011,21, 525-531
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    Novel redox reversible oxide, Sr-doped cerium orthovanadate to metavanadate

    C. T. G. Petit, R. Lan, P. I. Cowin, J. T. S. Irvine and S. Tao, J. Mater. Chem., 2011, 21, 525
    DOI: 10.1039/C0JM02669G

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