摘要
为了选择合适的离子液体体系来进行电沉积制备Ir层,并为离子液体中电沉积制备Ir层提供理论基础,需要研究离子液体的电化学性质以及IrCl3在离子液体体系中的溶解度。本文利用电导率仪测定BMIC等4种纯离子液体及其复合离子液体的电导率,利用循环伏安法(CV)测定离子液体的电化学窗口,利用紫外-可见分光(UV-Vis)光度计测定了IrCl3在离子液体中的溶解度。结果表明:纯离子液体的电导率随温度的升高而逐渐增大;纯离子液体的电化学窗口宽度随温度的升高而有所减小;IrCl3在纯离子液体中的溶解度与溶液温度及离子液体的离子作用能密切相关,在相同温度下IrCl3在纯离子液体中的溶解度顺序为BUPYBF4>BMIBF4>HMIBF4;复合离子液体的电化学窗口与其组成中电化学窗口宽度较窄的纯离子液体的电化学窗口一致,电导率值则处于两种纯离子液体之间;IrCl3在由相同阴离子组成的复合离子液体BUPYBF4+BMIBF4中的溶解度与纯BUPYBF4基本相同,而在由相同阳离子组成的复合离子液体BMIC+BMIBF4中的溶解度则有很大的提高。BMIC+BMIBF4的复合离子液体不仅保持了纯离子液体的电化学性质的优势,还克服了纯离子液体对于IrCl3溶解度偏低的缺点。与纯离子液体相比,BMIC+BMIBF4的复合离子液体体系更适合用于电沉积制备Ir层。
In order to choose a proper ionic liquid solution system to electrodeposit Ir layer and provide theoretical bases for electrode- positing Ir layer in ionic liquid, it is necessary to study the electrochemical properties and solubility of IrCl3 in ionic liquid. Electric conductivity of four different ionic liquids was studied using conductivity meter and electrochemical window, which was measured by cy- clic vohammetry （CV） method. The IrC13 solubility in ionic liquids was studied using ultraviolet-visible （UV-Vis） spectrophotometer. The results showed that as the temperature rose, the conductivity of ionic liquids increased and the electrochemical window of ionic liq- uid narrowed slightly; the solubility of Ire13 in ionic liquids was influenced by the ionic interaction energy and the temperature of ionic liquids. The order of solubility of the ionic liquids was BUPYBF4 〉 BMIBF4 〉 HMIBF4 at the same temperature; the electrochemical window of the composited ionic liquid by two different ionic liquids was the same with the narrower one, and the conductivity of the composited ionic liquid was between the two kind pure ionic liquids ; the solubility of IrC13 in the composited BMIBF4 ＋ BUPYBF4 ionic liquid changed little compared with that in the pure BUPYBF4, while that in the composited BMIBF4 ＋ BMIC ionic liquid increased much. The composited BMIBF4 ＋ BMIC ionic liquid showed similar electrochemical properties with the pure ionic liquid, but it could dissolve more lrC13 than the pure ionic liquid. So it was more helpful to the electrodeposition of Ir layer.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2015年第2期136-143,共8页
Chinese Journal of Rare Metals
基金
国家自然科学基金项目(51071014)
航空科学基金项目(2010ZE51055)资助
