The strategy of introducing heteroatom sulfur (S) in the cobalt manganese spinel oxides (CoMn₂O₄) is employed to boost the bifunctional electrocatalyst. The optimized sample of S– CoMn₂O₄ shows overpotentials shifts of 60 mV at 10 mA cm⁻² for the oxygen evolution reaction (OER) and 40 mV for the oxygen reduction reaction (ORR). X-ray photoelectron spectroscopy results reveal that the S-doping can significantly increase highly active Mn⁴⁺, Co³⁺, and oxygen defects, while density functional calculation results suggest that metal-oxygen covalency of S–CoMn₂O₄ can enhance the shrinking energy difference of Co 3d-O 2p and Mn 3d-O 2p centers, which can explain the enhancement of OER/ORR activities. What's more, the S–CoMn₂O₄ based zinc-air battery displays excellent open voltage of 1.52 V, power density of 108.3 mW cm⁻², specific capacity of 808.2 mA h g⁻¹ at 10 mA cm⁻², and good cycling stability. This work shows that the doping of heteroatom in the spinel materials can provide a feasible pathway to obtain optimized bifunctional catalysis for power sources devices.

采用在钴锰尖晶石氧化物（CoMn ₂ O ₄）中引入杂原子硫（S）的策略来增强双功能电催化剂。经过优化的S–CoMn ₂ O ₄样品在10 mA cm ^-2的氧释放反应（OER）和40 mV的氧还原反应（ORR）表现出60 mV的过电势漂移。X射线光电子能谱结果表明，S掺杂可显着增加高活性Mn ⁴⁺，Co ³⁺和氧缺陷，而密度泛函计算结果表明S–CoMn ₂ O _4的金属-氧共价可以增强Co 3d-O 2p和Mn 3d-O 2p中心的收缩能差，这可以解释OER / ORR活性的增强。此外，基于S–CoMn ₂ O ₄的锌空气电池显示出色的1.52 V开路电压，108.3 mW cm ^-2的功率密度， 10 mA cm ^-2的比容量为808.2 mA h g ^-1以及良好的循环性能稳定。这项工作表明，尖晶石材料中杂原子的掺杂可以提供一种可行的途径来获得针对电源装置的最佳双功能催化。