The interface between HOPG and 1-butyl-3-methyl-imidazolium hexafluorophosphate.
The interface between HOPG and 1-butyl-3-methyl-imidazolium hexafluorophosphate.
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DOI：
10.1039/c5cp05406k
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发表时间：
2016-01
期刊：
影响因子：
--
通讯作者：
Claus Müller;K. Németh;S. Vesztergom;T. Pajkossy;T. Jacob
中科院分区：
文献类型：
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作者：
Claus Müller;K. Németh;S. Vesztergom;T. Pajkossy;T. Jacob
用循环伏安法、电化学阻抗谱、浸没电荷测量和原位扫描隧道显微镜研究了高定向热解石墨(HOPG)与1-丁基-3-甲基咪唑六氟磷酸盐(BMIPF6)的界面。并与在BMIPF6(Phys.化学。化学。物理，2011年，13,11627)。主要结果是两个系统的高频电容谱相似，但在低频率时，一些缓慢的界面过程导致Au(100)面上出现第二个电容弧，这是HOPG所没有的。缓慢的过程归因于Au表面结构的重排和离子液体附着层的形成--这些都可以用原位STM观察到。
The interface between highly oriented pyrolytic graphite (HOPG) and 1-butyl-3-metyl-imidazolium hexafluorophosphate (BMIPF6) has been studied using cyclic voltammetry, electrochemical impedance spectroscopy, immersion charge measurements and in situ scanning tunneling microscopy (in situ STM). The results are compared with those obtained with Au(100) in BMIPF6 (Phys. Chem. Chem. Phys., 2011, 13, 11627). The main result is that the high frequency capacitance spectra on the two systems are similar to each other, however at low frequencies some slow interfacial processes cause the appearance of a second capacitance arc on Au(100), which is absent for HOPG. The slow processes are attributed to the rearrangement of the Au surface structure and to the formation of ionic liquid adlayers--these are visualized by in situ STM.