Study on structure and oxide ionic conductivity for new compound Ce6−xLnxMoO15−δ

A new compound Ce6-xLnxMoO15-delta has been synthesized by wet-chemistry method. Their crystal structure and oxide ionic conductivity were characterized by powder X-ray diffraction, Raman, IR spectrum and A.C. impedance technique. The XRD results showed that Ce6MoO15-delta, Ce5LnMoO15-delta have cubic symmetry with Fm3m space group. The refined lattice parameters showed that their lattice constants decrease with the decrease of the ionic radius of Ln3+. The electrochemical measurements showed that the ionic conductivity of resulting oxides Ce6-xLnxMoO15-delta have an enhance, which may be a kind of promising material for SOFCs.