Electrochemical Investigation of 1-Ethyl-3-methylimidazolium Bromide and Tetrafluoroborate Mixture at Bi(111) Electrode Interface

被引：22

作者：

Siimenson, Carolin ^{[1
]}

Lembinen, Meeri ^{[2
]}

Oll, Ove ^{[1
]}

Lall, Laura ^{[1
]}

Tarkanovskaja, Marta ^{[2
]}

Ivanistsev, Vladislav ^{[1
]}

Siinor, Liis ^{[1
]}

Thomberg, Thomas ^{[1
]}

Lust, Karmen ^{[1
]}

Lust, Enn ^{[1
]}

机构：

[1] Univ Tartu, Inst Chem, EE-50411 Tartu, Estonia

[2] Univ Tartu, Inst Phys, EE-50411 Tartu, Estonia

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2016年 / 163卷 / 09期

关键词：

ELECTRICAL DOUBLE-LAYER; TEMPERATURE IONIC LIQUID; CORROSION INHIBITION; HALIDE ADSORPTION; IODIDE-IONS; ACETONITRILE; CAPACITANCE; BISMUTH; ANIONS; KINETICS;

D O I：

10.1149/2.0111609jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical characterization of the interface between Bi(111) surface and ionic liquid mixtures of 1-ethyl-3-methylimidazolium tetrafluoroborate with 1-ethyl-3-methylimidazolium bromide (EMImBF(4) + x% EMImBr) has been evaluated by using the electrochemical impedance spectroscopy, cyclic voltammetry methods and density functional theory calculations. Dependence of the experimental data on the bromide concentration and on the electrode potential has been analyzed. Comparison of adsorption data with Bi(111) vertical bar EMImBF(4) + x% EMImI interface shows that adsorption activity of halide ions from EMImBF(4) follows a similar trend as from the aqueous and organic electrolyte solutions. The adsorption activity of anions increases in order Cl- < Br- < I-, despite the fact that the solvation properties of relevant media are significantly different. We discuss this trend in the light of a possible application of the RTIL mixtures as an electrolyte for electrochemical energy storage devices like supercapacitors. (C) The Author(s) 2016. Published by ECS. All rights reserved.

引用

页码：H723 / H730

页数：8

共 58 条

[51] Influence of anion composition and size on the double layer capacitance for Bi(111)/room temperature ionic liquid interface [J].