Abstract
In recent years, Cu-CeO2/YSZ anode materials have been investigated as alternative anode materials for direct oxidation of variety of hydrocarbons for SOFC applications. However, the thermal stability of Cu-CeO2 anode at operating temperature greater than 700 °C is a major concern. The paper reports a use of Fe species as a textural promoter to prevent Cu sintering at high temperature. Cu-Fe/CeO2-YSZ anodes for molar ratio of Cu-Fe of 1:0 and 1:1 prepared by wet impregnation method in tape casted porous YSZ cermets. It was observed that addition of Fe in Cu-CeO2/YSZ anodes improved the performance of SOFC. Cu-Fe/CeO2-YSZ anodes having molar ratio of Cu-Fe of 1:1 showed power density of 180, 77 and 172 mW/cm2 in H2, CH4 and n-C4H10 fuels at 800 °C. Moreover, the performance of SOFC increases with the increase in temperature, Cu-Fe metal loading, and with addition of 1 wt% Pd in Cu-Fe/CeO2-YSZ anodes. The long term stability of Cu-Fe/CeO2-YSZ anodes for Cu-Fe molar ratio of 1:1 is presented while operating SOFC on H2, CH4 and n-C4H10 fuels at 800 °C
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