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

Christophe TG Petit, Rong Lan, Peter I Cowin, John TS Irvine, Shanwen Tao

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    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.
    Original languageEnglish
    Pages (from-to)525-531
    Number of pages7
    JournalJournal of Materials Chemistry
    Volume21
    Issue number2
    Early online date27 Oct 2010
    DOIs
    Publication statusPublished - 2011

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    Cerium
    Vanadates
    Solid state reactions
    Perovskite
    Oxides
    Diffraction patterns
    Powders
    X ray diffraction
    Air
    Oxidation-Reduction
    Hot Temperature

    Cite this

    Novel redox reversible oxide, Sr-doped cerium orthovanadate to metavanadate. / Petit, Christophe TG ; Lan, Rong; Cowin, Peter I; Irvine, John TS; Tao, Shanwen .

    In: Journal of Materials Chemistry, Vol. 21, No. 2, 2011, p. 525-531.

    Research output: Contribution to journalArticle

    Petit, Christophe TG ; Lan, Rong ; Cowin, Peter I ; Irvine, John TS ; Tao, Shanwen . / Novel redox reversible oxide, Sr-doped cerium orthovanadate to metavanadate. In: Journal of Materials Chemistry. 2011 ; Vol. 21, No. 2. pp. 525-531.
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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) {\AA} 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.",
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    AU - Tao, Shanwen

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    N2 - 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.

    AB - 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.

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