The interface between Au(111) and an ionic liquid
The interface between Au(111) and an ionic liquid
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DOI：
10.1016/j.electacta.2009.08.031
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发表时间：
2010-08-30
影响因子：
6.6
通讯作者：
Kolb, D. M.
中科院分区：
文献类型：
--
作者：
Gnahm, M.;Pajkossy, T.;Kolb, D. M.
The electrochemical interface between Au(1 1 1) and 1-butyl-3-methyl-imidazolium hexafluorophosphate has been studied by cyclic voltammetry and electrochemical impedance spectroscopy in a potential range, which might be considered to be the double-layer charging region for Au(1 1 1) is such an environment. The corresponding equivalent circuit is given by a capacity in parallel to a constant phase element (CPE). The high-frequency value of the capacity - that is. the double-layer capacitance - is about 6-7 mu F/cm(2) over the whole potential range under study, whereas the CPE peaks at a potential, which coincides with the potential of zero total charge (pztc), as determined by immersion experiments. This latter element expresses the kinetics of the re-structuring of the interfacial region. In situ STM measurements reveal marked structural differences positive and negative of the pztc. (C) 2010 Elsevier Ltd. All rights reserved.
