Outside Back Cover: In‐tandem Electrochemical Reduction of Nitrate to Ammonia on Ultrathin‐Sheet‐Assembled Iron–Nickel Alloy Nanoflowers

Nitrate electrocatalytic reduction to ammonia occurs with exceptional performance on ultrathin-sheet-assembled Fe80Ni20 nanoflowers, as described by Jason Lam et al. in their Research Article (e202500167). Mechanistic studies revealed that NO3 preferentially adsorbs and is reduced to NO2 on the Fe surface. Subsequently, NO2 is efficiently hydrogenated to NH3 on the Ni surface. This in-tandem mechanism between Fe and Ni significantly enhances the electrocatalytic reduction of NO3 to NH3.