Structural Regulation Strategies of Atomic Cobalt Catalysts for Oxygen Electrocatalysis

Abstract Oxygen electrocatalysis is a core reaction in renewable energy devices, greatly promoting the transformation and upgrading of the energy structure. Nonetheless, the performance of energy conversion devices is hindered by the large overpotential and slow kinetics of oxygen electrocatalytic reactions. Recently, single‐atom catalysts (SACs) have emerged as promising contenders in the field of oxygen electrocatalysis because of their exceptional metal atom utilization, distinctive coordination environment, and adjustable electronic properties. This review presents the latest advancements in the design of Co‐based SACs for oxygen electrocatalysis. First, the OER and ORR mechanisms are introduced. Subsequently, the strategies for regulating the electronic structure of Co‐based SACs are summarized in three aspects, including coordination environment, metal centers, and support carriers. A particular emphasis is given to the relationship between the structure and properties of catalysts. Afterward, the latest applications of Co‐based SACs in energy conversion devices are explored. Ultimately, the challenges and prospects for Co‐based SACs are prospected.