Coupling isolated Ni single atoms with sub-10 nm Pd nanocrystals embedded in porous carbon frameworks to boost oxygen electrocatalysis for Zn–air batteries

Atomically dispersed Ni sites are coupled with sub-5 nm Pd nanocrystals embedded in carbon frameworks to form a bifunctional catalyst, which could serve as a highly efficient catalyst for the ORR, OER, and Zn–air batteries.