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dc.creatorBajuk-Bogdanovic, Danica
dc.creatorHolclajtner-Antunović, Ivanka
dc.creatorJovanović, Zoran
dc.creatorMravik, Željko
dc.creatorKrstić, Jugoslav
dc.creatorUskoković-Marković, Snežana
dc.creatorVujkovic, Milica
dc.date.accessioned2019-10-24T11:18:58Z
dc.date.available2019-10-24T11:18:58Z
dc.date.issued2019
dc.identifier.issn1433-0768
dc.identifier.urihttp://farfar.pharmacy.bg.ac.rs/handle/123456789/3455
dc.description.abstractThe synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interaction with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon.sr
dc.language.isosrsr
dc.publisherSpringersr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172043/RS//sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45006/RS//sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45014/RS//sr
dc.relationSlovenian Research Agency (Project P2-0091)sr
dc.rightsrestrictedAccesssr
dc.sourceJournal of Solid State Electrochemistrysr
dc.subjectHeteropoly acidsr
dc.subjectActivated carbonsr
dc.subjectOxygen functional groupssr
dc.subjectComposite materialssr
dc.subjectSupercapacitorsr
dc.titleTailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?sr
dc.typearticlesr
dc.rights.licenseARRsr
dcterms.abstractВујковиц, Милица; Бајук-Богдановиц, Даница; Холцлајтнер-Aнтуновић, Иванка; Јовановић, Зоран; Мравик, Жељко; Крстић, Југослав; Ускоковић-Марковић, Снежана;
dc.citation.volume23
dc.citation.issue9
dc.citation.spage2747
dc.citation.epage2758
dc.citation.rankM22~
dc.identifier.wos000484549900012
dc.identifier.doi10.1007/s10008-019-04369-4
dc.identifier.scopus2-s2.0-85071463941
dc.type.versionpublishedVersionsr


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