| Autor: |
Junsoo Han, Ho Lun Chan, Marlene G. Wartenberg, Helge H. Heinrich, John R. Scully |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Electrochemistry Communications, Vol 122, Iss , Pp 106900- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1388-2481 |
| DOI: |
10.1016/j.elecom.2020.106900 |
| Popis: |
The frequency-dependent impedance of a metal/oxide/room temperature ionic liquid (RTIL) interface was separated into oxide layer (Cox) and double layer (Cdl) capacitances using electrochemical impedance spectroscopy (EIS). A pre-formed oxide of known initial thickness on Fe-20 at.% Cr was investigated in 1-ethyl-3-methylimidazolium methanesulfonate ([Emim][MeSO3]) RTIL + aqueous mixtures. The oxide thickness was calculated from Cox using the complex capacitance representation and the power-law model. The result was additionally verified by cross-sectional analysis using transmission electron microscopy. The Cdl calculated from the constant-phase element (CPE) was distinguishable from Cox for Fe-20Cr, which enables monitoring of the interfaces of structural metals with oxide layers in RTILs containing water. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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Full Text from ScienceDirect