Boosting the performance of La0.5Sr0.5Fe0.9Mo0.1O3-δ oxygen electrode via surface-decoration with Pr6O11 nano-catalysts

Cobalt-free La 0.5 Sr 0.5 Fe 0.9 Mo 0.1 O 3-δ (LSFM) oxide is particularly investigated as a durable and efficient oxygen electrode material for the reversible solid oxide cells (RSOCs) in this study. Pr 6 O 11 nano-catalysts are introduced into LSFM oxygen electrode as synergistic catalysts to enhance and optimize the electrode reactions. Results demonstrate an effectively promoted oxygen reduction and evolution reaction kinetics of the Pr 6 O 11 decorated LSFM electrode. Polarization resistances ( R p ) of LSFM electrode are dramatically reduced with the increasing Pr 6 O 11 nano-catalysts and the lowest R p of 0.039 Ω cm 2 is obtained at 800 °C, which is ∼97% lower than that of the LSFM electrode. The Pr 6 O 11 decorated LSFM oxygen electrode also displays a superior durability under cyclic anodic and cathodic polarizations. Furthermore, both the maximum power density and electrolytic current density of the Pr 6 O 11 decorated cell are more than 2 times that of the LSFM cell. Results make clear reliability of the Pr 6 O 11 decorated LSFM to be a promising oxygen electrode for RSOCs.