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Abstract Carbon‐based electrocatalysts with both high activity and high stability are desirable for use in Zn–air batteries. However, the carbon corrosion reaction (CCR) is a critical obstacle in rechargeable Zn–air batteries. In this study, a cost‐effective carbon‐based novel material is reported with a high catalytic effect and good durability for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), prepared via a simple graphitization process. In situ growth of graphene is utilized in a 3D‐metal‐coordinated hydrogel by introducing a catalytic lattice of transition metal alloys. Due to the direct growth of few‐layer graphene on the metal alloy decorated 3d‐carbon network, greatly reduced CCR is observed in a repetitive OER test. As a result, an efficient bifunctional electrocatalytic performance is achieved with a low Δ E value of 0.63 V and good electrochemical durability for 83 h at a current density of 10 mA cm −2 in an alkaline media. Moreover, graphene‐encapsulated transition metal alloys on the nitrogen‐doped carbon supporter exhibit an excellent catalytic effect and good durability in a Zn–air battery system. This study suggests a straightforward way to overcome the CCR of carbon‐based materials for an electrochemical catalyst with wide application in energy conversion and energy storage devices.
Ha et al. (Thu,) studied this question.