Ti foam-Ni-Sn/Bi电极制备及其电还原NO_(3)^(-)-N的性能  

Electrocatalytic reduction of NO_(3)^(-)-N by the prepared Ti foam-Ni-Sn/Bi cathode

作　　者：张海兵 刘云遏 黄志昊 沈蓉 ZHANG Haibing;LIU Yun’e;HUANG Zhihao;SHEN Rong(College of Chemical Engineering and Environment,China University of Petroleum-Beijing at Karamay,Karamay 834000,Xinjiang,China;China Zhenhua Oil Company,Ltd.,Beijing 100031,China)

机构地区：[1]中国石油大学(北京)克拉玛依校区工学院,新疆克拉玛依834000 [2]振华石油控股有限公司,北京100031

出　　处：《化工进展》2025年第2期1100-1109,共10页Chemical Industry and Engineering Progress

摘　　要：水体中硝酸盐氮(NO_(3)^(-)-N)的污染不仅会造成水生态环境的恶化,还对人类健康构成严重威胁,已引起世界广泛关注。本文通过在泡沫钛板(Ti foam)上化学镀Ni-电沉积镀Sn/Bi的方法制备出一种新型含有中间层的Ti foam-Ni-Sn/Bi电极。扫描电子显微镜、X射线衍射仪以及电极性能特性测试结果表明Ni以及Sn/Bi被分别成功沉积到了Ti基底和Ni中间层上,并具备较大的电化学活性面积和较多的活性位点。以制备的Ti foam-Ni-Sn/Bi电极为阴极、Ti/RuO_(2)-Ir_(2)O_(3)电极为阳极构建电还原体系,对水中NO_(3)^(-)-N进行电还原处理。实验结果表明,在初始NO_(3)^(-)-N浓度为150mg/L、电流密度为20m A/cm^(2)、pH为3、搅拌速率600r/min、板间距为3cm时,电还原6h后NO_(3)^(-)-N去除率达87.43%,氮气(N_(2))选择性为90.73%。因此,本方法制备的Ti foam-Ni-Sn/Bi电极在NO_(3)^(-)-N电还原过程中表现出较好的还原性能和较高的N_(2)选择性。The pollution of nitrate nitrogen(NO_(3)^(-)-N)in water has attracted wide attention in the world,which causes the deterioration of water ecological environment and poses a serious threat to human health.In this work,the Ti foam-Ni-Sn/Bi electrode was prepared by electroless Ni and electrodeposition plating Sn/Bi on titanium foam plate.The SEM,XRD and electrochemical tests indicated that Ni and Sn/Bi were successfully deposited on the Ti substrate and intermediate layer Ni,respectively,with a larger electrochemical active area and more active sites.The system of Ti foam-Ni-Sn/Bi electrode as cathode and Ti/RuO_(2)-Ir_(2)O_(3)electrode as anode was constructed and used for electrocatalytic reduction of the NO_(3)^(-)-N simulated water.The results indicated the degradation rate of nitrate nitrogen was 87.43%and the N_(2)selectivity was 90.73%,as the initial NO_(3)^(-)-N concentration was 150mg/L,electrocatalytic reduction time was 6h,the current density was 20mA/cm^(2),pH was 3,stirring rate was 600r/min,and the distance between electrodes was 3cm.The Ti foam-Ni-Sn/Bi cathode prepared in this work showed high electroreduction activity and N_(2)selectivity in electrocatalytic reduction of the NO_(3)^(-)-N.

关 键 词：Ti foam-Ni-Sn/Bi电极 硝酸盐氮 电还原 氮气选择性 

分 类 号：TQ15[化学工程—电化学工业] TQ09