Abstract
A series of perovskite oxides La1-xSmxMn0.8Co0.2O3 (x = 0.2, 0.4, 0.6, 0.8) were prepared using the carbon microsphere template method, and the prepared samples have a loose porous structure with a large specific surface area. Among them, the sample La0.8Sm0.2Mn0.8Co0.2O3 with doping amount x = 0.2 has higher half-wave potential, onset potential and limiting current density, which has the highest electron transfer number during the oxygen reduction reaction and is more favorable for the 4 e- reaction to occur. In addition, it has the lowest overpotential and the smallest ΔE. It has excellent bifunctional catalytic activity and shows good application prospects.
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