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0.05, 0.1, 0.15, 0.2) are prepared by solid state reaction of stoichiometric mixtures of BaCO3, ZrO2, CeO2, Yb2O3, and Y2O3 (ball milling in EtOH for 48 h, calcination in air at 1100°C, 20 h). BaZr0.1Ce0.7Y0.1Yb0.1O3-δ exhibits very high ionic conductivity below 750°C and resists deactivation by carbon buildup from hydrocarbon fuels and H2S poisoning. It is an attractive electrolyte or electrode component for solid oxide fuel cells of high power output at lower temperatures. The material may also be used as a catalyst for reforming of hydrocarbon fuels and for removal of fuel gas contaminants such as sulfur. -(YANG, L.; WANG, S.; BLINN, K.; LIU, M.; LIU, Z.; CHENG, Z.; LIU*, M.;

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