化学
电化学
氨
等离子体
氨生产
无机化学
物理化学
电极
有机化学
量子力学
物理
作者
Xiaoli Ge,Chengyi Zhang,Mayuresh Janpandit,S. Prakash,Pratahdeep Gogoi,Daoyang Zhang,Timothy R. Cook,Geoffrey I. N. Waterhouse,Longwei Yin,Ziyun Wang,Yuguang Li
摘要
Electrochemical activation of dinitrogen (N2) is notoriously challenging, typically yielding very low ammonia (NH3) production rates. In this study, we present a continuous flow plasma-electrochemical reactor system for the direct conversion of nitrogen from air into ammonia. In our system, nitrogen molecules are first converted into a mixture of NOx species in the plasma reactor, which are then fed into an electrochemical reactor. To selectively convert the generated NOx species into NH3, we employed a graph theory approach combined with first-principles calculations to comprehensively enumerate all possible pathways from N2-to-NH3, pinpointing key intermediates (NH2* and NO*). A series of bimetallic catalysts was then designed to target the optimal adsorption and conversion of the limiting intermediate in the NOx-to-NH3 pathway. Using an optimized CuPd foam catalyst, we demonstrated an ammonia production rate of 81.2 mg h–1 cm–2 with stability over 1000 h at an applied current of 2 A.
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