Dual-Atom Catalysts for Metal-Air Batteries

Metal-air batteries have been extensively considered owing to their advantages like low cost, high energy density, and high safety. Recently, Zn-air batteries have attracted growing attention because of their lower toxicity, low manufacturing cost, safety, and environmental benignity, in addition to high energy density. Single-atom catalysts, as suitable alternatives to Pt-based catalysts, have been suggested as oxygen electrocatalysts for Zn-air batteries owing to the many benefits like great catalytic performance, electronic properties, 100% atom utilization, and good reusability. On the other side, recently, dual-atom catalysts have emerged as powerful candidates for Zn–air batteries. Compared to single-atom catalysts, dual-atom catalysts have higher metal loading, flexible active sites, and better catalytic performance, so, more opportunities for electrocatalysis. An increasing number of reports have been published lately on the Zn–air batteries over dual-atom catalysts. In this chapter, a comprehensive survey of recent research progress about metal–air batteries is provided.