“…Pt-based and Ru-based catalysts based on precious metals are the best catalysts for catalytic activity, but their limited resources, expensive nature, and poor corrosion resistance inevitably restrict the commercialization of Zn-air batteries. 7−9 Non-noble metal alloy materials (such as NiCo, 10−12 FeCo, 13,14 NiFe, 15,16 and CoCu 17 ) have become promising cost-effective alternative oxygen electrocatalysts due to their high electron mobility, high catalytic selectivity, and activity in OER. 18,19 Although the abundant valence-state changes are facilitated by the lattice strain differences on the two different metals in the alloy catalyst, 20,21 the regulation ability is limited and even uncontrollable due to the natural feature of the surface oxidation.…”