Coking resistant Ni–La0.8Sr0.2FeO3 composite anode improves the stability of syngas-fueled SOFC

An improved SOFC anode with excellent stability against carbon deposition syngas as fuel is reported. The material Ni–La0.8Sr0.2FeO3 (LSF) composite synthesized by anhydrous impregnation. After reduction in wet H2 (3% H2O), the partially decomposes to SrLaFeO4 and exsolved Fe. Fe forms Ni–Fe alloy impregnated Ni. particle size of about 20–50 nm. nanoparticles disperse on surface La0.8Sr0.2FeO3 oxides. increase Ni content promotes exsolution increases reaction sites alloy. With content, electrical conductivity catalytic activity are enhanced, which improves electrochemical performance single cell. cell 10 mol.% Ni-LSF achieves a maximum power density 550 mW cm−2 at 700 °C fueled syngas. strong interaction nano-sized LaxSryFeOz (La0.8Sr0.2FeO3 or SrLaFeO4) oxide substrate efficiently suppresses high graphitization degree. Besides, phase can accommodate interstitial oxygen facilitates removal deposited carbon.