Published on Web 11/09/2006
Enhanced Oxide Ion Conductivity in Stabilized δ-Bi2O3 Rita Punn,† Antonio M. Feteira,‡ Derek C. Sinclair,‡ and Colin Greaves*,† School of Chemistry, The UniVersity of Birmingham, Edgbaston, Birmingham, UK, B15 2TT, and Department of Engineering Materials, The UniVersity of Sheffield, Sheffield, UK, S1 3JD Received August 16, 2006; E-mail:
[email protected] Bismuth oxides have important potential for ceramic oxygen generators (e.g., for portable oxygen supplies) because of their potential to exhibit at low temperatures (300-500 °C) both high oxide ion conductivity and electrocatalytic activity for the interconversion of molecular O2 and O2- ions.1 Here we report conductivity and structural data on some new materials that are related to cubic δ-Bi2O3 but have low-temperature (
