新型饱和砷钨杂多酸修饰电极的电化学性能研究  

Electrochemical properties research of novel arsentungstate modified electrode

作　　者：王大明[1] 贺欢[2] 李天娇[2] 齐斌[2] 王胜天[2] 

机构地区：[1]吉林省石油化工设计研究院,吉林长春130021 [2]东北师范大学化学学院,吉林长春130024

出　　处：《分子科学学报》2015年第1期47-52,共6页Journal of Molecular Science

基　　金：吉林省科技厅资助项目(20140204085GX)

摘　　要：将有序多孔阳极氧化铝（PAA）模板修饰到涂有饱和Dawson型K6[As2W18O62]·14H2O（As2W18）杂多酸的溶胶（Sol）玻碳电极（GCE）上,制备了新型的PAA/As2W18-Sol/GC修饰电极.采用SEM、XRD和循环伏安等测试技术对多孔PAA形貌、结构和修饰电极性能进行表征,考察了PAA对修饰电极电化学性质的影响,并用循环伏安法（CV）和电流-时间（i-t）曲线法探讨了修饰电极电化学行为.研究结果表明,有序多孔PAA模板不仅改善了As2W18-Sol/GCE的可逆性,使峰形变得更加尖锐,而且还提高了修饰电极的稳定性和灵敏度;该纳米多孔材料修饰电极对邻苯二酚有明显的催化还原作用,在1.0×10-6~0.01mol/L浓度范围内邻苯二酚浓度与催化电流呈线性关系,检测限达到1.0×10-8 mol/L,可用于实际样品测定.In this work, a novel modified electrode was prepared by the K6 [As2W18 O62] · 14H2O （As2W18） and sol doping technique with unique three-dimensional highly ordered PAA covering on modified electrode surface. The morphology of PAA, the crystalline form of As2W18. and electro- chemical properties were characterized by field emission scanning electron microscope（SEM）, X-Ray Diffraction（XRD） and Cyclic Voltammetry（CV） measurements respectively. The pH and concentra- tion of background electrolyte were optimized. The reversibility of the cyclic voltammograms was im- proved obviously due to the unique properties pore structures of highly ordered PAA compare with As2 W18-Sol/GCE. In addition, the electrochemical properties and the electrocatalysis capability of this modified electrode have studied by CV and i-t curve. The experimental results showed that this modi- fied electrode had better stability and better catalytic activity, selectivity and linear range to the （C6 H4 （OH）2）.

关 键 词：K6[As2W18O62]14H2O 阳极氧化铝 修饰电极 邻苯二酚 

分 类 号：O643[理学—物理化学]