“…[1][2][3] Among all the candidate batteries, the Zn-air battery (ZAB) is expected to be the next generation of global battery due to its unique semi-open system, signicant theoretical energy density, exible electrodes, environmental friendliness, and abundant resources. 4,5 However, the kinetics of the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) of ZABs in the process of charging and discharging is sluggish, resulting in high overpotential, low roundtrip efficiency, low cycle life, and energy conversion efficiency, which are the major bottlenecks for large-scale commercial applications of ZABs. [6][7][8] Noble metal Pt-based and Ru-and Irbased catalysts are considered to be effective catalysts for the ORR and OER, respectively.…”