Electrochemically superior ammonia production from electroplating wastewater over oxygen-incorporated antiperovskite

The electrochemical reduction of nitrates from real electroplating wastewater to ammonia offers an appealing solution for environmental sustainability and waste recycling. However, the slow charge transfer between the catalyst and adsorbent limits their catalytic performance. Herein, a typical oxygen-incorporated Cu_0.5NFe_3.5 antiperovskite was synthesized successfully using the magneto-thermal stimulation strategy, achieving an impressive ammonia yield rate of 1.34mmol h⁻¹ cm⁻² and a high Faradaic efficiency of 95.5 % at −0.6 V vs. RHE. Furthermore, we developed a membraneless flow electrolyzer paired with an ammonia recovery device that synchronizes nitrate reduction and ammonia recovery for treating real electroplating wastewater. This work presents a viable approach for developing high-performance oxygen-incorporated antiperovskites suitable for treating real electroplating wastewater.