纳米笼
电合成
氨生产
硝酸盐
氨
化学
废水
材料科学
无机化学
纳米技术
环境科学
物理化学
环境工程
电化学
催化作用
有机化学
电极
作者
Sishuang Tang,Minghao Xie,Saerom Yu,Xun Zhan,Ruilin Wei,Maoyu Wang,Weixin Guan,Bowen Zhang,Jing Wang,Hua Zhou,Gengfeng Zheng,Yuanyue Liu,Jamie H. Warner,Guihua Yu
标识
DOI:10.1038/s41467-024-51112-3
摘要
Given the growing emphasis on energy efficiency, environmental sustainability, and agricultural demand, there's a pressing need for decentralized and scalable ammonia production. Converting nitrate ions electrochemically, which are commonly found in industrial wastewater and polluted groundwater, into ammonia offers a viable approach for both wastewater treatment and ammonia production yet limited by low producibility and scalability. Here we report a versatile and scalable solution-phase synthesis of high-entropy single-atom nanocages (HESA NCs) in which Fe and other five metals-Co, Cu, Zn, Cd, and In-are isolated via cyano-bridges and coordinated with C and N, respectively. Incorporating and isolating the five metals into the matrix of Fe resulted in Fe-C5 active sites with a minimized symmetry of lattice as well as facilitated water dissociation and thus hydrogenation process. As a result, the Fe-HESA NCs exhibited a high selectivity toward NH3 from the electrocatalytic reduction of nitrate with a Faradaic efficiency of 93.4% while maintaining a high yield rate of 81.4 mg h−1 mg−1. Converting nitrate from waste sources into ammonia provides an effective method for both wastewater treatment and ammonia production. Here the authors report a scalable solution-phase synthesis of high-entropy single-atom nanocage catalysts for efficient nitrate-to-ammonia conversion.
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