Electrochemical Characterization of Iodide Ions Adsorption Kinetics at Bi(111) Electrode from Three-Component Ionic Liquids Mixtures

ECS Electrochemistry Letters Pub Date : 2015-01-01 DOI:10.1149/2.0011512EEL

C. Siimenson, Liis Siinor, K. Lust, E. Lust

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引用次数: 12

Abstract

The electrochemical behavior of RTIL mixtures containing 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3methylimidazolium trifluoromethanesulfonate and 1-ethyl-3-methylimidazolium iodide were characterized by using cyclic voltammetry and electrochemical impedance spectroscopy methods. The capacitance values of the system at potentials more positive than −0.6 V (vs. Ag|AgCl| mixture of RTIL) strongly depend on the chemical nature of the anions in the mixture. Also the strong adsorption of I− at Bi(111) (well-known in aqueous and classical organic solvents) has been demonstrated in RTIL media. The capacitance values are noticeably higher for EMImOTF + EMImBF4 + 1 wt% EMImI than that for EMImOTF + 1 wt% EMImI. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0011512eel] All rights reserved.

查看原文本刊更多论文

三组分离子液体混合物在Bi(111)电极上吸附碘离子动力学的电化学表征

采用循环伏安法和电化学阻抗法表征了含1-乙基-3-甲基咪唑四氟硼酸盐、1-乙基-3-甲基咪唑三氟甲磺酸盐和1-乙基-3-甲基咪唑碘化物的RTIL混合物的电化学行为。当电位大于- 0.6 V时，系统的电容值(相对于RTIL的Ag|AgCl|混合物)强烈依赖于混合物中阴离子的化学性质。此外，在RTIL介质中也证明了I - at Bi(111)的强吸附(在水溶剂和经典有机溶剂中众所周知)。EMImOTF + EMImBF4 + 1 wt% EMImI的电容值明显高于EMImOTF + 1 wt% EMImI。©作者2015。由ECS出版。这是一篇基于知识共享署名4.0许可(CC BY, http://creativecommons.org/licenses/by/4.0/)的开放获取文章，该许可允许在任何媒体上不受限制地重复使用该作品，前提是正确引用原始作品。[DOI: 10.1149/2.0011512eel]版权所有

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ECS Electrochemistry Letters ELECTROCHEMISTRY-MATERIALS SCIENCE, MULTIDISCIPLINARY

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