Praseodymium–Cerium Oxide-Infiltrated Perovskite\nCathode with Superior Electrochemical Performance for Solid Oxide\nFuel Cells

This study presents a high-performance\nsolid oxide fuel cell employing\na perovskite cathode, strontium iron molybdenum oxide [Sr<sub>2</sub>Fe<sub>1.5</sub>Mo<sub>0.5</sub>O<sub>6−δ</sub> (SFM)],\ninfiltrated with praseodymium–cerium oxide [Pr<sub>0.2</sub>Ce<sub>0.8</sub>O<sub>2−δ</sub> (PCO)], a fluorite.\nThis infiltration notably enhances the oxygen reduction reaction kinetics\nand long-term stability. Evidence of enhanced stability is seen through\nminimized impedance degradation over 50 h. Furthermore, PCO infiltration\nimproves the cathode’s resistance to chromium poisoning by\nsuppressing strontium degradation. Compared to the bare SFM cathode,\nthe PCO-infiltrated SFM composite cathode doubles the cell’s\npower density at 800 °C.