Highly active and durable electrocatalysts are of great significance to accelerate the sluggish oxygen evolution and oxygen reduction reaction (OER and ORR) which are indispensable processes in practical devices such as metal–air batteries. Herein, the authors integrate morphological design with compositional manipulation, and successfully achieve well‐defined CoNiFe sulfide mesoporous nanospheres (CoNiFe‐S MNs). The as‐prepared CoNiFe‐S MNs exhibit superior OER and ORR catalytic activity, delivering a low overpotential of only 199 mV at a current density of 10 mA cm⁻² in 1 m KOH solution and a half‐wave potential of 0.78 V in 0.1 m KOH solution toward OER and ORR, respectively. The CoNiFe‐S MNs involved Zn–air battery exhibits remarkable charge–discharge performance (voltage gap of 0.76 V at 2 mA cm⁻²) and high power density (over 140 mW cm⁻³). Extended‐time durability tests validate the structural recoverability of the mesoporous morphology, and the remarkable performance can be attributed to the intrinsic synergistic effect of heterometallic ions. It is believed that the method could pave the way for the design of novel electrocatalysts for Zn–air batteries.

中文翻译：

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三金属硫化物介孔纳米球是可充电锌空气电池的优良电催化剂

高活性和持久性的电催化剂对于加速缓慢的氧气释放和氧气还原反应（OER和ORR）具有重要意义，这是金属-空气电池等实际设备中必不可少的过程。本文中，作者将形态学设计与成分操纵相结合，并成功实现了定义明确的CoNiFe硫化物介孔纳米球（CoNiFe‐S MNs）。所制备的CoNiFe-S MN具有优异的OER和ORR催化活性，在1 m KOH溶液中的电流密度为10 mA cm ^-2时，仅提供1​​99 mV的低过电势，而在0.1 m的溶液中具有0.78 V的半波电势米分别面向OER和ORR的KOH解决方案。含锌空气电池的CoNiFe-S MN具有出色的充放电性能（在2 mA cm ^-2时的电压间隙为0.76 V ）和高功率密度（超过140 mW cm ^-3）。长时间的耐用性测试验证了介孔形态的结构可恢复性，并且卓越的性能可以归因于杂金属离子的内在协同效应。人们认为，该方法可以为锌-空气电池的新型电催化剂的设计铺平道路。