Electrochemical reconstruction-generated electrolyte-preferred Cu(OH)2 active phase cooperating with highly redox-active Mo/Ce for electrocatalytic ammonia synthesis.

An electrochemical reconstruction strategy was employed to construct an electrolyte-preferred Cu(OH)2 active phase under alkaline conditions, synergizing with highly redox-active Ce and Mo embedded into a carbon matrix to enable efficient electrocatalytic reduction of nitrate to ammonia with near-unity *H utilization, achieving a yield of 26.5 mg h-1 mgcat-1 and faradaic efficiency of 95.1%.