Sulfur tolerant redox stable layered perovskite SrLaFeO4 − δ as anode for solid oxide fuel cells.

Redox stable K 2 NiF 4 type layered perovskite SrLaFeO 4 − δ (SLFO 4 − δ ) has been prepared and evaluated as anode for solid oxide fuel cell (SOFC). The SLFO 4 − δ shows linear thermal expansion behavior with TEC of 14.3 × 10 − 6 K − 1 . It also demonstrates excellent catalytic activity for various fuels. A scandia stabilized zirconia (ScSZ, 180 μm) electrolyte supported SOFC with the anode achieves maximum power densities (P max ) of 0.93, 0.76, 0.63, and 0.46 Wcm − 2 at 900–750 °C, respectively, in wet H 2 . P max s of cells supported by 250 μm ScSZ reach 0.57, 0.60 and 0.50 Wcm − 2 in H 2 , H 2 + 50 ppm H 2 S and propane, respectively, at 800 °C. Moreover, the cells show stable power output during ~ 100 h operation at 800 °C under 0.7 V in various fuels. The P max at 800 °C in wet H 2 even increases by ~ 11% in the subsequent two thermal cyclings, indicating that SLFO 4 − δ is a promising anode candidate for SOFC with good electro-catalytic activity, high stability and resistance to sulfur and coking. [ABSTRACT FROM AUTHOR]