Show simple item record

dc.contributor.authorTorresi, Roberto M
dc.contributor.authorLodovico, Lucas
dc.contributor.authorBenedetti, Tania M
dc.contributor.authorAlcantara, Maria R
dc.contributor.authorDebiemme-Chouvy, Catherine
dc.contributor.authorDeslouis, Claude
dc.date.accessioned2022-03-02T04:41:51Z
dc.date.available2022-03-02T04:41:51Z
dc.date.issued2013
dc.identifier.issn0013-4686en_US
dc.identifier.doi10.1016/j.electacta.2013.01.050en_US
dc.identifier.urihttp://hdl.handle.net/10072/412869
dc.description.abstractIn this work, the role of convective mass transport in two ionic liquids (ILs) that differ by the anions 1-butyl-2,3-dimethyl-imidazolium bis(trifluoromethanesulfonyl)imide ([BMMI][Tf2N]) and 1-butyl-2,3-dimethyl-imidazolium tetrafluorborate ([BMMI][BF4]) were studied in the presence of ferrocene (Fc) as a redox tracer. A rotating disk electrode (RDE) system was used, and the use of electrochemical (EIS) and electrohydrodynamic (EHD) impedance spectroscopies allowed for a deeper analysis of mass transport and charge transfer at the surface of the electrode. The two ILs showed a viscoelastic character that was observed using a parallel plate geometry viscometer with a high storage-to-loss modulus ratio in a frequency domain where the RDE response was characterized by significant elongational flow kinematics. As a general conclusion, the observed effects were interpreted as unbalanced contributions of the elongational flow close to the electrode surface, which induced an anisotropic diffusivity that increased along the flow lines, and the effect of Fc and Fc+ as structure breakers or strengtheners in the diffusion layer. Finally, from EIS analysis, it was established that increasing the overpotential in the anodic direction yielded an increased Schmidt number, which indicated a detrimental effect on the mass transport of Fc+, whose production rate was also increased under the same conditions. EIS showed that the anion had an effect on the reaction rate of Fc oxidation and on the double-layer capacitance value. © 2013 Elsevier Ltd. © 2013 Elsevier Ltd. All rights reserved.en_US
dc.languageEnglishen_US
dc.publisherElsevieren_US
dc.relation.ispartofpagefrom32en_US
dc.relation.ispartofpageto43en_US
dc.relation.ispartofjournalElectrochimica Actaen_US
dc.relation.ispartofvolume93en_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsPhysical Sciencesen_US
dc.subject.keywordsElectrochemistryen_US
dc.subject.keywordsIonic liquiden_US
dc.subject.keywordsViscosityen_US
dc.titleConvective mass transport in ionic liquids studied by electrochemical and electrohydrodynamic impedance spectroscopyen_US
dc.typeJournal articleen_US
dcterms.bibliographicCitationTorresi, RM; Lodovico, L; Benedetti, TM; Alcantara, MR; Debiemme-Chouvy, C; Deslouis, C, Convective mass transport in ionic liquids studied by electrochemical and electrohydrodynamic impedance spectroscopy, Electrochimica Acta, 2013, 93, pp. 32-43en_US
dc.date.updated2022-03-02T04:10:11Z
gro.hasfulltextNo Full Text
gro.griffith.authorBenedetti, Tania


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record