A Nano-Architectured Metal-Oxide/Perovskite Hybrid Material as Electrocatalyst for the Oxygen Reduction Reaction in Aluminum–Air Batteries
journal contribution
posted on 2018-11-28, 00:00 authored by Yejian Xue, Shanshan Yan, Heran Huang, Zhaoping LiuA nanoarchitectured
La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>–La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> hybrid catalyst is prepared
by a facile hydrothermal method. The La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> nanorods are well distributed on the regular hexagonal La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> nanosheet. The La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>–La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> catalyst has better catalytic activity to oxygen
reduction reaction than that of La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> or La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>. The reaction
kinetics result shows that La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>–La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> sample follows
a four-electron transferred process during the oxygen reduction reaction.
Furthermore, the stability of La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>–La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> is higher
than that of Pt/C. By using La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>–La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> as the cathode
catalysts for aluminum–air battery, the power densities can
reach 223.8 mW cm<sup>–2</sup>. The high catalytic performance
of the La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>–La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> can be attributed to the strong interaction
between the La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> material and
La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> material.
