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dc.creatorGavrilov, Nemanja M.
dc.creatorMomčilović, Milan Z.
dc.creatorDobrota, Ana S.
dc.creatorStanković, Dalibor M.
dc.creatorJokić, Bojan M.
dc.creatorBabić, Biljana M.
dc.creatorSkorodumova, Natalia V.
dc.creatorMentus, Slavko V.
dc.creatorPašti, Igor A.
dc.date.accessioned2018-07-06T12:15:21Z
dc.date.available2018-07-06T12:15:21Z
dc.date.issued2018
dc.identifier.issn0257-8972 (print)
dc.identifier.urihttps://linkinghub.elsevier.com/retrieve/pii/S0257897218305838
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/7727
dc.description.abstractThe incorporation of trace amounts (<0.2%) of Co and Ni noticeably enhanced the catalytic activity of nitrogen-free ordered mesoporous carbon (OMC) towards oxygen reduction reaction (ORR). (Co,Ni)-doped OMCs were characterized by N2-adsorption measurements, X-ray powder diffraction, field emission scanning electron microscopy and Raman spectroscopy methods, and their ORR activity was estimated by voltammetry on rotating disk electrode in acidic and alkaline media. (Co,Ni)-doped OMCs show modest activities in acidic media, while the catalytic activity in alkaline media is rather high. The measured activities are compared to the Pt-based and Pt-free ORR catalysts reported in the literature. The number of electrons consumed per O2in metal-doped OMCs was found to vary between 2 and 4, which is advantageous in comparison to metal-free OMC. Also, the mass activities of metal-doped OMCs were found to be up to 2.5 times higher compared to that of metal-free OMC. We suggest that the ORR activity is governed by a balance between (i) textural properties, which determine the electrochemically accessible surface of the catalyst and which are influenced by the addition of a metal precursor, and (ii) novel active sites formed upon the introduction of metals into the carbon structure. In particular, our Density Functional Theory calculations suggest that Co and Ni atoms embedded into the single vacancies of graphene can activate the O2molecule and contribute to the decomposition of peroxide.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43009/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45014/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45016/RS//
dc.relationSwedish Research Council (2014-5993)
dc.relationSerbian Academy of Sciences and Arts (F-190)
dc.relationNATO (EAP·SFPP 984925) (“DURAPEM - Novel Materials for Durable Proton Exchange Membrane Fuel Cells”)
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/621375/EU//
dc.rightsrestrictedAccess
dc.sourceSurface and Coatings Technology
dc.subjectcobalten
dc.subjectelectrocatalystsen
dc.subjectmetal dopantsen
dc.subjectnickelen
dc.subjectordered mesoporous carbonen
dc.subjectoxygen reduction reactionen
dc.titleA study of ordered mesoporous carbon doped with Co and Ni as a catalyst of oxygen reduction reaction in both alkaline and acidic mediaen
dc.typearticleen
dc.rights.licenseARR
dcterms.abstractЈокић, Бојан; Бабић, Биљана; Скородумова, Наталиа В.; Ментус, Славко В.; Пашти, Игор A.; Момчиловић, Милан; Гаврилов, Немања; Доброта, Aна С.; Станковић, Далибор М.;
dc.rights.holder© 2018 Elsevier B.V.
dc.citation.volume349
dc.citation.spage511
dc.citation.epage521
dc.identifier.wos000441492600054
dc.identifier.doi10.1016/j.surfcoat.2018.06.008
dc.type.versionpublishedVersion
dc.identifier.scopus2-s2.0-85048745900


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