离子液体[Bmim]BF_4中锌的电沉积研究  

Electrodeposition of Zinc in Ionic Liquid[Bmim]BF_4 System

作　　者：黄红艳[1] 李宁[1] 成旦红[1] 印仁和[1] 周尉[1] 

机构地区：[1]上海大学化学系,上海200444

出　　处：《复旦学报（自然科学版）》2014年第2期169-174,共6页Journal of Fudan University：Natural Science

基　　金：国家自然科学青年基金资助项目(21003088)

摘　　要：在l-丁基-3-甲基咪唑四氟硼酸盐[Bmim]BE_4离子液体中,以Zn(BF_4)_2为锌盐,研究了在铂基底上锌的电沉积.对锌盐浓度、温度对锌电沉积的影响进行了研究,并分析了锌的成核机理.根据Scharifkera和Hills模型处理得到的无因次曲线,发现锌在铂电极上的电结晶在初始短时间内按三维瞬时成核机理形成.随着时间增长,成核过程变成既不是瞬时成核也非连续成核的一种混合成核模式.温度升高与锌盐浓度增加都使得锌的还原电位正移,过电位减小.SEM结果表明,在锌盐浓度与温度较高时得到的镀层较致密且颗粒相对较大.The electrodeposition of zinc on a Pt electrode from zinc tetrafluoroborate Zn（BF4 ）2 in ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate （[Bmim~ BF4 ） is studied. The nucleation mechanism of zinc has been investigated. The effect of temperature and concentration on the electrochemical characteristics of Zn2＋/Zn redox is also investigated by using cyclic voltammetry. Increasing the zinc salt concentration and temperature results in that the reduction potential of zinc shifts positively. The SEM results show that the morphology of the obtained deposit is different at different temperature Zn deposit obtained at higher temperature is more dense compared with those obtained at room temperature.

关 键 词：离子液体 电沉积 锌 成核机理 形貌 

分 类 号：O647.1[理学—物理化学]