A Nano-Architectured Metal-Oxide/Perovskite Hybrid Material as Electrocatalyst for the Oxygen Reduction Reaction in Aluminum-Air Batteries

A nanoarchitectured La2O2CO3-La0.7Sr0.3MnO3 hybrid catalyst is prepared by a facile hydrothermal method. The La2O2CO3 nanorods are well distributed on the regular hexagonal La0.7Sr0.3MnO3 nanosheet. The La2O2CO3-La0.7Sr0.3MnO3 catalyst has better catalytic activity to oxygen reduction reaction than that of La2O2CO3 or La0.7Sr0.3MnO3. The reaction kinetics result shows that La2O2CO3-La0.7Sr0.3MnO3 sample follows a four-electron transferred process during the oxygen reduction reaction. Furthermore, the stability of La2O2CO3-La0.7Sr0.3MnO3 is higher than that of Pt/C. By using La2O2CO3-La0.7Sr0.3MnO3 as the cathode catalysts for aluminumair battery, the power densities can reach 223.8 mW cm(2). The high catalytic performance of the La2O2CO3-La0.7Sr0.3MnO3 can be attributed to the strong interaction between the La2O2CO3 material and La0.7Sr0.3MnO3 material.