Ultrathin nickel sulfide nanosheets for sulfur ion electrooxidation assisted acetonitrile electroreduction  

作　　者：Xiao-Hui Wang Ze-Nong Zhang Na Li Xuan Ai Xue Xiao Yu Chen Shu-Ni Li 

机构地区：[1]Key Laboratory of Macromolecular Science of Shaanxi Province,School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi’an 710062,China [2]School of Materials Science and Engineering,Shaanxi Normal University,Xi’an 710062,China

出　　处：《Science China Chemistry》2025年第3期951-960,共10页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China (22309108);the Science and Technology Innovation Team of Shaanxi Province (2023-CX-TD-27);the Fundamental Research Funds for the Central Universities (GK202202001);Sanqin Scholars Innovation Teams in Shaanxi Province,China。

摘　　要：Electrochemical reduction of acetonitrile(ACN)to ethylamine(ETA)is a new strategy for producing high-value chemicals.Herein,the ultrathin nickel sulfide nanosheets(Ni_(x)S_(y)NSs)anchored on nickel foam(NF)nanohybrid(Ni_(x)S_(y)NSs/NF)were designed as an efficient bifunctional electrocatalyst for the waste conversion.Owing to the introduction of the S element,the ultrathin nanosheet structure,and the three-dimensional architecture,Ni_(x)S_(y)NSs/NF simultaneously reveals excellent electrocatalytic activity for both electrochemical ACN reduction reaction(EACNRR)at the cathode and electrochemical sulfur ion(S^(2-))oxidation reaction(ESOR)at the anode.For the EACNRR,Ni_(x)S_(y)NSs/NF exhibits a Faradaic efficiency of 95.5%and the ETA yield of 923.1 mmol h^(-1)g^(-1)at-0.05 V potential.For the ESOR,the S^(2-)ion is oxidized to the value-added S_8 product,in which the oxidation potential is only 0.16 V at 50 mA cm^(-2).Consequently,the assembled Ni_(x)S_(y)NS s/NF||Ni_(x)S_(y)NSs/NF electrolytic cell is successfully established for the ESOR-assisted EACNRR system that only needs a cell voltage of 0.32 V to reach the 50 mA cm^(-2)current density.This work provides an effective and energy-saving strategy for the co-production of value-added chemicals from pollutants.

关 键 词：ELECTROSYNTHESIS hydrogenation two-dimensional nanomaterials acetonitrile reduction reaction sulfur ion oxidation reaction 

分 类 号：TQ226.31[化学工程—有机化工] O643.36[理学—物理化学]