Atomically Paired Cu–Co Dual Sites for Near-Unity Ammonia Selectivity in Nitrate Electroreduction

current densities for simultaneous ammonia and oxygen production. Operando studies confirm that atomic Cu-Co proximity effectively addresses the kinetic barriers in the ammonia formation pathway. Our results bridge molecular-level catalyst design with industrial-level electrocatalysis, demonstrating the viability of dual-active-site engineering for high-throughput ammonia electrosynthesis.