Designing composite material that contains high-active oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) species is an effective strategy for synthesizing bifunctional electrocatalysts for Zn–air batteries. In this work, we first reported the preparation of the Co₆Mo₆C₂–Co@NC nanorod composite by using the Mo-polydopamine@ZIF-67 composite as the precursor. Because of the highly active Co₆Mo₆C₂ for OER and the high-active Co for ORR, the Co₆Mo₆C₂–Co@NC exhibits superior OER activity, with a low overpotential of 268 mV at 10 mA cm⁻², and high ORR performance. When used as bifunctional electrocatalysts for the Zn–air battery, the battery exhibits a high open-circuit voltage of 1.38 V and a specific capacity of 760 mA/h/g, as well as very high stability of up to 300 h with no obvious increase in charge–discharge voltage gap.

设计包含高活性氧释放反应（OER）和氧还原反应（ORR）物质的复合材料是合成锌空气电池双功能电催化剂的有效策略。在这项工作中，我们首先报道了以Mo-polydopamine @ ZIF-67复合材料为前体制备Co ₆ Mo ₆ C ₂ -Co @ NC纳米棒复合材料的方法。由于高活性的钴₆沫₆ c ^ ₂为OER和高活性钴为ORR，将Co ₆沫₆ c ^ ₂ -Co @ NC在10mA厘米表现出优良的活性OER，具有低的超电势268毫伏^{- 2}和高ORR性能。当用作Zn-空气电池的双功能电催化剂时，该电池具有1.38 V的高开路电压和760 mA / h / g的比容量，以及高达300 h的非常高的稳定性，没有明显的变化。充放电电压间隙的增加。