In-situ scalable fast fabrication of Cu-Cu_(2+1)O nanorods for highly efficient electrocatalytic reduction into ammonia under neutral medium  

作　　者：Sai Huang Ao Wang Xin-Yue Dong Jin-Kun Li Yan Meng Jun-Ling Song 

机构地区：[1]International Joint Research Center for Photoresponsive Molecules and Materials,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China

出　　处：《Journal of Materials Science & Technology》2023年第24期111-118,共8页材料科学技术（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21975106 and 21403232);MOE&SAFEA,111 Project(B13025)for financial support.

摘　　要：The development of a highly efficient and durable electrocatalyst for nitrate reduction reaction(NO_(3)RR)wastewater valorization to ammonia(NH_(3))is a promising strategy.However,it is challenging to design scalable low-cost electrocatalysts with high activity,high selectivity,and long-term stability by a facile and simple method.Herein,we construct this scalable Cu-based nanoarray with muti-oxidation states grown directly on nickel foam(NF)substrate(Cu_(2+1)O@Cu/NF)using a facile molten salt method combined in-situ electrochemical reduction.The as-prepared Cu_(2+1)O@Cu/NF nanoarrays reveal a high NH_(3) yield of 20.14 mg h^(−1) cm^(−2) at−0.95 V vs.a reversible hydrogen electrode(vs.RHE),Faradaic efficiency of 99.38%at−0.55 V vs.RHE in the neutral potassium phosphate(PBS)buffer solution with 50 mM NaNO_(3),which is ascribed to its electron redistribution with abundant oxygen vacancies and favorable charge/mass transfer.

关 键 词：Cu-Cu2+1O nanorods with multi-oxidation states High NH3 yield Molten salt method Neutral medium Nitrate electrochemical reduction Scalable fabrication 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]