Interfacial Co-O-Cu bonds prompt electrochemical nitrate reduction to ammonia in neutral electrolyte.

In this work, the formed interfacial Co-O-Cu bonds in Co-doped Cu(OH) 2 (Co 2 -Cu(OH) 2 ) sufficiently expose active sites and improve the reaction kinetics. As a result, the optimal Co 2 -Cu(OH) 2 provides an amazing faradaic efficiency (91.6%), high selectivity (93.2%) and robust stability toward the NO 3 RR.