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Strong enhancement of migrational contribution to the transport by charged gel microlayers anchored on electrode surface

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dc.abstract.enThe influence of the presence of positively charged gel layers deposited on the electrode surface on reduction and oxidation of ionic substances in the absence of deliberately added supporting electrolyte was examined. The gel layers based on crosslinked copolymer of N-isopropylacrylamide (NIPA) and N-(3-aminopropyl)methacrylamide hydrochloride were used. The polymer net was positively charged in a wide pH range. Differently charged ferrocene derivatives, ferrocenyltrimethylammonium cation (FcN+), sodium salt of ferrocenylmethyl-3-mercapto-1-propanesulfonic acid (FcS−) and 1,1’-ferrocenedimethanol (Fc(MeOH)2), were used as the electroactive probes. It appeared that the depression of the oxidation current of cations was much stronger compared to bare electrodes; the depression factor equaled circa 2. The increase in oxidation current of anions was also strongly enhanced compared to bare electrodes; it amounted to 1.7 times. Addition of excess supporting electrolyte to the solution led to cancelling of major current changes. It meant that sufficiently concentrated supporting electrolyte eliminated not only regular migrational contribution but also strongly influenced the electrostatic-interactions between charged probes and charged polymer network.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorStojek, Zbigniew
dc.contributor.authorKaniewska, Klaudia
dc.contributor.authorKarbarz, Marcin
dc.date.accessioned2024-01-26T08:20:50Z
dc.date.available2024-01-26T08:20:50Z
dc.date.copyright2021-06-23
dc.date.issued2021
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.versionFINAL_PUBLISHED
dc.description.volume390
dc.identifier.doi10.1016/J.ELECTACTA.2021.138807
dc.identifier.issn0013-4686
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/120854
dc.identifier.weblinkhttps://doi.org/10.1016/j.electacta.2021.138807
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofElectrochimica Acta
dc.relation.pages138807
dc.rightsCC-BY-NC-ND
dc.sciencecloudnosend
dc.subject.enVoltammetry
dc.subject.enMigration
dc.subject.enMicroelectrode
dc.subject.enModified electrode
dc.subject.enThin hydrogel layer
dc.titleStrong enhancement of migrational contribution to the transport by charged gel microlayers anchored on electrode surface
dc.typeJournalArticle
dspace.entity.typePublication