Engineering CoO/Co 3 O 4 heterostructures coupled with adjacent Fe single atoms to boost tandem electrocatalytic nitrate reduction for high-efficiency ammonia production

The efficient tandem FeSA@CoO/Co 3 O 4 NC electrocatalyst couples dual active sites: FeSA sites reduce nitrate to nitrite, while CoO/Co 3 O 4 sites drives nitrite conversion, accelerating the eNO 3 RR kinetics and boosting performance.