摘要：

采用电沉积方法在铂基体上制备了十二烷基磺酸根掺杂聚吡咯（PPy/DS-）薄膜。通过电化学石英晶体微天平技术探讨了膜的聚合机制，并结合循环伏安法和XPS能谱考察了PPy/DS-薄膜在碱金属和碱土金属溶液中的电化学行为和离子置入/置出机制。结果表明：PPy/DS-薄膜具有良好的电活性；膜电极在进行氧化还原扫描的同时伴随有阴/阳离子的交换，通过控制电位可单独实现阳（阴）离子的交换过程；电压范围为-1.05～0.14 V时，薄膜在CsNO₃溶液中循环扫描只伴随着Cs+的交换；PPy/DS-薄膜在碱金属溶液中的稳定性高于碱土金属溶液，尤其在CsNO3溶液中显示了良好的稳定性。

Abstract:

Polypyrrole films doped with dodecylsulfate （PPy/DS-）were synthesized on platinum substrates by electrochemical polymerization and the film-electrode systems were investigated as electrochemically switched ion exchange materials.Electrochemical quartz crystal microbalance （EQCM）technique was used to investigate the polymerization mechanism of the PPy/DS- film.Combined with Cyclic Voltammetry （CV）and X-ray photoelectron （XPS），the electrochemical behavior and ion loading/unloading mechanism of PPy/DS- film electrodes were also investigated in electrolytes of alkali-metals and alkaline-earth metals.Experimental results indicated that PPy/DS- film had good electroactivity.The oxidation and reduction process of PPy/DS- film were accompanied by cation exchange and anion exchange simultaneously，and cation or anion exchange could be performed singly by controlling scan potential.In CsNO3 solution，only Cs+ could be exchanged when the thin film was scanning between -1.05 V and 0.14 V.The cycle life in alkali-metals nitrates was better than that in alkaline-earth metals nitrates，especially in CsN