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

Christophe T. G. Petit, Rong Lan, Peter I. Cowin, John T. S. 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 group Pnma (62) with a = 5.5181 (3), b = 7.7853 (2) and c = 5.5155 (4) angstrom for Ce0.85Sr0.15VO3. Conductivity measurements were performed in air and in dry 5% H-2-Ar with conductivity values at 700 degrees 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

Keywords

  • fuel cell anodes
  • magnetic properties
  • perovskites
  • CEVO4
  • CA
  • transport
  • vanadate
  • crystal
  • PR
  • ND

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