Electrochemical behavior of silver in 1-ethyl-3-methylimidazolium tetrafluoroborate molten salt

被引:87
作者
Katayama, Y [1 ]
Dan, S [1 ]
Miura, T [1 ]
Kishi, T [1 ]
机构
[1] Keio Univ, Fac Sci & Technol, Dept Appl Chem, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan
关键词
D O I
10.1149/1.1341243
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A room-temperature molten salt, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) with adequate purity was obtained simply by the reaction of 1-ethyl-3-methylimidazolium chloride and tetrafluoroboric acid. Silver tetrafluoroborate dissolves up to similar to0.2 mol dm(-3) in EMIBF4 at room temperature. Electrochemical deposition and dissolution of silver on a platinum electrode were found possible in EMIBF4 containing AgBF4. The reduction of monovalent silver species is electrochemically irreversible, the rate constant being estimated to be 1 X 10(-5) cm s(-1). The diffusion coefficient of Ag(I) is calculated to be 6 x 10(-7) cm(2) s(-1), suggesting that Ag(I) exists as a substantially bare cation (Ag+) in EMIBF4. (C) 2001 The Electrochemical Society. All rights reserved.
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收藏
页码:C102 / C105
页数:4
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