Electrical and Electrochemical Behavior of Carbon Paste Electrodes Modified with Ionic Liquids Based in N-Octylpyridinium Bis(Trifluoromethylsulfonyl)Imide. A Theoretical and Experimental Study

Simple item page
dc.contributor.authorBaez, Carla
dc.contributor.authorNavarro, Freddy
dc.contributor.authorFuenzalida, Francesca
dc.contributor.authorAguirre, Maria J.
dc.contributor.authorCarmen Arevalo, M.
dc.contributor.authorAfonso, Maria
dc.contributor.authorGarcia, Camilo
dc.contributor.authorRamirez, Galo
dc.contributor.authorAntonio Palenzuela, J.
dc.date2019
dc.date.accessioned2021-04-30T17:05:09Z
dc.date.available2021-04-30T17:05:09Z
dc.description.abstractIn this work, we studied carbon paste electrodes (CPEs) with two kinds of binders: mineral oil or ionic liquids (IL) derived from N-substituted octyl pyridinium bis(trifluoromethylsulfonyl)imide with the substituents H-, CH3-, CN- and CF3-. The work aims to study this series of IL and determine a possible effect of the substituent of the cation in the behavior of the IL as a binder of graphite for obtaining IL-CPEs. The electrochemical response and the electrical behavior were measured by cyclic voltammetry and electrochemical impedance spectroscopy, respectively. Surprisingly, the substituent does not affect the cyclic voltammetry response because in all the cases, high resistance and high capacitive currents were obtained. The best response in terms of conductivity is obtained by CPE. In the case of impedance measurements, the substituent does not cause differences, and in all the cases, the IL-CPEs show nearly the same responses. CPE shows lower capacitance and higher resistance for diffusion compared to the IL-CPEs due to his lower porosity. The high resistance showed by the IL-CPEs by cyclic voltammetry can be attributed to poorly intermolecular forces among graphite, water, electrolyte, and ILs as demonstrated by theoretical calculations.
dc.identifier.citationMOLECULES,Vol.24,,2019
dc.identifier.doi10.3390/molecules24183382
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/4000
dc.language.isoen
dc.publisherMDPI
dc.sourceMOLECULES
dc.subject.englishionic-liquid carbon paste electrodes
dc.subject.englishN-octyl pyridinium bis(trifluoromethylsulfonyl)imide
dc.subject.englishintramolecular forces of ionic liquid
dc.titleElectrical and Electrochemical Behavior of Carbon Paste Electrodes Modified with Ionic Liquids Based in N-Octylpyridinium Bis(Trifluoromethylsulfonyl)Imide. A Theoretical and Experimental Study
dc.typeArticle
uct.catalogadorWOS
uct.indizacionSCI
Files
Collections
MigraciĆ³n Web of Science