Single Ag Atoms Induce Ag‐N/O Bonds on WO3 for Ultrastable Acid Ammonia Synthesis

at -4 V and maintained the stability for over 30 h with FE > 90%. Experimental and theoretical analysis have demonstrated that the formation of Ag-N/O bonds enhanced nitrate adsorption and lowered the energy barrier for the rate-determining step of *NO→*NHO, thereby considerably improving the efficiency of ammonia synthesis and inhibiting HER at amperometric current densities. This work provides insights into acidic nitrate reduction for ammonia electrosynthesis, which develops corrosion-resistant electrocatalysts for energy conversion.