Strengthening oxygen reduction activity based on the cooperation of pyridinic-N and graphitic-N for atomically dispersed Fe sites

Theoretical calculations predicted the combination of pyridinic-N and graphitic-N promotes electrocatalytic ORR activity of Fe SASs. Thus, a Fe–N 4 SAS-based catalyst was designed and showed excellent performance for ORR and an alkaline H 2 /O 2 fuel cell.