Abstract
Potential-dependent structures of Pt(100)/ionic liquid 1-methyl-3-octylimidazolium hexafluorophosphate (OMIPF6) interface have been studied by electrochemical scanning tunneling microscopy (ECSTM). The cation OMI+ forms ordered structure on Pt(100) surface, which exists in a potential region of about 1.2 V. When the potential is more negative than -0.6 V, it can be seen that the ordered structure transforms to disordered structure. When the potential shifts positively to +0.6 V, the desorption of cations OMI+ occurs, which indicates that strong electrostatic repulsion is needed to overcome chemical interaction between OMIPF6 and Pt(100) surface, leading to the desorption. The above results demonstrate that owing to the longer alkyl chain OMI+ can interact strongly with Pt(100), which plays an important role in the structure of Pt(100)/ OMIPF6 interface.
Graphical Abstract
Keywords
Electrochemical interface, Ionic liquid, Pt(100), Ordered adsorption
Publication Date
2016-12-28
Online Available Date
2016-09-09
Revised Date
2016-09-06
Received Date
2016-06-29
Recommended Citation
Jin PENG, Mian-gang LI, Li-qiang XIE, Jia-wei YAN, Bing-wei MAO.
An STM study on the Structure of Pt(100)/Ionic Liquid OMIPF6 Interface[J]. Journal of Electrochemistry,
2016
,
22(6): 596-601.
DOI: 10.13208/j.electrochem.160565
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol22/iss6/8
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