Designing durable and low-cost electrocatalysts for zinc-air batteries is critical, which plays an essential role in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this paper, the CoMn2O4/N-RGO bifunctional electrocatalyst was synthesized by a facile hydrothermal method. The electrocatalytic performance was tested toward ORR and OER under alkaline condition (0.1[Formula: see text]M KOH). The XRD, SEM and other characterization analyses were used to investigate the physicochemical properties of materials. The results showed that the electrochemical activity of CoMn2O4/N-RGO showed high power density (354[Formula: see text]mW[Formula: see text]cm[Formula: see text], small charge/discharge voltage drop (0.70[Formula: see text]V) and excellent stability cycle (200[Formula: see text]h), which are superior to the noble metal Pt/C+IrO2 electrocatalyst (the voltage drop: 0.60[Formula: see text]V at initial and 0.85[Formula: see text]V after 13[Formula: see text]h). This work provided a new method for developing the bifunctional material in zinc-air batteries.

中文翻译：

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CoMN2O4负载氮掺杂石墨烯的制备作为可充电锌空气电池的双功能电催化剂

为锌空气电池设计耐用且低成本的电催化剂至关重要，它在氧还原反应 (ORR) 和析氧反应 (OER) 中起着至关重要的作用。在本文中，CoMn2○4/N-RGO双功能电催化剂通过简便的水热法合成。在碱性条件下（0.1[公式：见正文]M KOH）测试了对ORR和OER的电催化性能。XRD、SEM等表征分析用于研究材料的物理化学性质。结果表明，CoMn 的电化学活性2○4/N-RGO表现出高功率密度（354[公式：见文]mW[公式：见文]cm[公式：见文]，充放电压降小（0.70[公式：见文]V）和优异的稳定性循环（200[公式：见正文]h），优于贵金属Pt/C+IrO2电催化剂（电压降：初始0.60[公式：见正文]V，13后为0.85[公式：见正文]V[公式：见正文]h）。这项工作为开发锌空气电池中的双功能材料提供了一种新方法。