Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

Structure, conductivity and redox reversibility of Ca-doped cerium metavanadate

Petit, Christophe T. G. and Lan, Rong and Cowin, Peter I. and Irvine, John T. S. and Tao, Shanwen (2011) Structure, conductivity and redox reversibility of Ca-doped cerium metavanadate. Journal of Materials Chemistry, 21 (24). pp. 8854-8861. ISSN 0959-9428

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

A-site substituted cerium metavanadates, Ce1-xCaxVO3, were synthesised by solid-state reactions from single-phase powders of the corresponding orthovanadates. All metavanadate samples were found to exhibit either an orthorhombic and/or monoclinic phase of space group Pnma (62) with a = 5.5067 (4), b = 7.7904 (5) and c = 5.4814(7) angstrom for Ce0.8Ca0.2VO3. X-Ray diffraction patterns and thermal analyses have shown that the reduction of Ca-doped CeVO3 from the equivalent orthovanadate is redox phase reversible without formation of parasitic phases at x = 0.2, 0.3. Conductivity measurements were performed in air and in dry 5% H-2-Ar with conductivity of Ce1-xCaxVO3 ranging from 1.5 to 13 S cm(-1) at 700 degrees C in a reducing atmosphere. Sample Ce0.7Ca0.3VO3 exhibits the highest conductivity in a reducing atmosphere in all the measured samples which could be a potential anode or as a part of composite anode for SOFCs. The conductivity of Ce0.7Ca0.3VO3 is higher than that for Ce0.85Sr0.15VO3 which could be related to the higher doping level.