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首页> 外文期刊>International Journal of Electrochemical Science >Electrocatalytic Activity of Co-based Perovskite Oxides for Oxygen Reduction and Evolution Reactions
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Electrocatalytic Activity of Co-based Perovskite Oxides for Oxygen Reduction and Evolution Reactions

机译：钴基钙钛矿氧化物对氧还原和析出反应的电催化活性

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摘要

Cathode of aqueous Li-air batter requires high electrocatalytic activities for oxygen reduction reactionand oxygen evolution reaction. Pure Co-based perovskite oxide (LaCoO3) was prepared by an auto- combustion method at a relatively low calcination temperature (640C), and La of La1SrxCoO3 waspartially substituted with Sr to enhance its electrocatalytic activities. La0.7Sr0.3CoO3 showed excellentcatalytic activity for the oxygen evolution reaction, and its activity for the oxygen reduction reactionwas increased with 5 wt% Pt loading. The electrochemical activity of perovskite was investigated bylinear sweep voltammetry and electrochemical impedance spectroscopy.
机译：水性锂空气电池的阴极对氧还原反应和析氧反应具有很高的电催化活性。通过自动燃烧法在较低的煅烧温度（640℃）下制备纯Co基钙钛矿氧化物（LaCoO3），La1SrxCoO3的La部分被Sr取代，以增强其电催化活性。 La0.7Sr0.3CoO3对氧气的放出反应具有极好的催化活性，并且随着5 wt％的Pt负载，其对氧气还原反应的活性增加。通过线性扫描伏安法和电化学阻抗谱研究了钙钛矿的电化学活性。

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