Confining ultrasmall bimetallic alloys in porous N–carbon for use as scalable and sustainable electrocatalysts for rechargeable Zn–air batteries

Ultrasmall bimetallic alloy nanoparticles are generated <italic>via</italic> a micro–mesopore confinement synthesis strategy in nanoporous N–carbon. The prepared catalysts show excellent bifunctional performance in both ORR and OER, and outstanding energy conversion efficiency in Zn–air batteries.