Coordination Engineering of Single‐Atom Catalysts for the Oxygen Reduction Reaction: A Review

Future renewable energy supplies and a sustainable environment rely on many important catalytic processes. Single-atom catalysts (SACs) are attractive because of their maximum atom utilization efficiency, tunable electronic structures, and outstanding catalytic performance. Of particular note, transition-metal SACs exhibit excellent catalytic activity and selectivity for the oxygen reduction reaction (ORR)—an important half reaction in fuel...