Electrosynthesis of hydroxylamine from nitrate reduction in water

作     者：Xianen Lan Chuanqi Cheng Chengying Guo Minghao Guo Tieliang Li Yongmeng Wu Yifu Yu Bin Zhang Xianen Lan;Chuanqi Cheng;Chengying Guo;Minghao Guo;Tieliang Li;Yongmeng Wu;Yifu Yu;Bin Zhang

作者机构：Institute of Molecular PlusDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Institute of New Energy MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical TransformationsTianjin 300192China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2023年第66卷第6期

页      面：1758-1762页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(22271213(B.Z.)and 22071173(Y.Y.)) the Haihe Laboratory of Sustainable Chemical Transformations the National Postdoctoral Science Foundation of China(2022M722357(Y.W.)) 

主　　题：electrosynthesis hydroxylamine nitrate reduction amorphous Mn reaction pathway 

摘      要：Hydroxylamine(NH_(2)OH),a vital but unstable industrial feedstock,is presently prepared under harsh conditions that cause environmental and energy ***,we report an electrochemical method to prepare oximes,which serve as precursors for NH_(2)OH after facile *** carbon-supported amorphous Mn electrocatalyst delivers a current density of~100 mA cm^(-2) with a Faradaic efficiency of 40.92%and a yield rate of 0.251 mmol cm^(-2)h^(-1) for formaldoxime(CH_(2)NOH)generation by using nitrate and formaldehyde as *** can be easily released to produce NH_(2)OH via ***,this method exhibits an economic advantage over conventional manufacturing based on techno-economic analysis.A series of control experiments,in situ characterizations,and theoretical simulations unveil the reaction mechanism via the spontaneous reaction between an aldehyde and*NH_(2)OH intermediate derived from nitrate *** high activity of Mn originates from its inhibitory effects on the further reduction of key*NH_(2)OH *** strategy opens a sustainable and green way for NH_(2)OH synthesis under mild conditions using renewable energy.