The double perovskite Sr₂Ni_0.4Co_1.6O₆ was prepared, and a set of α-MnO₂/Sr₂Ni_0.4Co_1.6O₆ hybrids with different α-MnO₂ loadings were fabricated. The electrochemical experiments illustrate that the hybrid catalyst (40 wt% of α-MnO₂) exhibited the highest activity, and the current density for the oxygen reduction reaction and oxygen evolution reaction were 0.2389 A cm⁻² (− 0.6 V vs. Hg/HgO) and 0.3951 A cm⁻² (1 V vs. Hg/HgO), respectively. The synergistic effect between α-MnO₂ and Sr₂Ni_0.4Co_1.6O₆ was responsible for the improved catalytic activity.

Graphic Abstract

中文翻译：

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α-MnO2/Sr2Ni0.4Co1.6O6杂化双功能氧反应电催化剂的制备及催化性能

制备了双钙钛矿Sr ₂ Ni _0.4 Co _1.6 O _{6 ，}并制备了一组不同α-MnO ₂负载量的α-MnO ₂ /Sr ₂ Ni _0.4 Co _1.6 O ₆杂化物。电化学实验表明混合催化剂（40 wt% α-MnO ₂）表现出最高的活性，氧还原反应和氧析出反应的电流密度为0.2389 A cm ^-2 (- 0.6 V vs. Hg/ HgO) 和 0.3951 A cm ^-2 (1 V vs. Hg/HgO)。α-MnO ₂之间的协同作用Sr ₂ Ni _0.4 Co _1.6 O ₆是提高催化活性的原因。

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