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CellsF 3000 Enhanced Sulfur and Coking Tolerance of a Mixed Ion Conductor for SOFCs:

BaZr0.1Ce0.7Y0.2-xYbxO3-δ. — The title anode materials for solid oxide fuel cells (x = 0, 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 poi-soning. 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.; Sci. (Washington, D. C., USA) 326 (2009) 5949, 126-129; Ga. Inst. Technol., Sch. Mater. Sci. Eng., Atlanta, GA 30332, USA; Eng.) — W. Pewestorf

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ChemInform 2009, 40, issue 50 © 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim