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Elektrohemijske karakteristike ugljeničnih nanocevi i ugljenika XC-72R i njihova primena u sintezi Pt katalizatora

dc.creatorObradović, Maja
dc.date.accessioned2019-01-30T17:23:24Z
dc.date.available2019-01-30T17:23:24Z
dc.date.issued2010
dc.identifier.issn0352-5139
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/677
dc.description.abstractThe results of an investigation of two samples of commercial multi-walled carbon nanotubes and a sample of carbon black, in the raw and activated state, were presented in the lecture. The activation of the carbon materials led to the formation of an abundance of oxygen-containing functional groups on the surface, an increased electrochemically active surface area, an enhanced charge storage ability and a promotion of the electron-transfer kinetics. It was presented that the morphology of the carbon nanotubes is important for the electrochemical properties, because nanotubes with a higher proportion of edge and defect sites showed faster electron transfer and pseudocapacitive redox kinetics. Modification of oxidized nanotubes by ethylenediamine and wrapping by poly(diallyldimethylammonium chloride) led to a decrease in the electrochemically active surface area and to reduced electrontransfer kinetics. Pt nanoparticles prepared by the microwave-assisted polyol method were deposited at the investigated carbon materials. A much higher efficiency of Pt deposition was observed on the modified CNTs than on the activated CNTs. The activity of the synthesized catalyst toward electrochemical oxygen reduction was almost the same as the activity of the commercial Pt/XC-72 catalyst.en
dc.description.abstractU okviru predavanja su prikazani rezultati ispitivanja dve vrste komercijalnih višeslojnih ugljeničnih nanocevi i uzorka ugljeničnog praha razvijene površine pre i nakon aktivacije hemijskom oksidacijom. Oksidacija uzoraka dovodi do izraženog formiranja kiseoničnih grupa na površini ugljeničnih materijala, povećanja elektrohemijski aktivne površine kao i do ubrzanja prenosa naelektrisanja. Pokazano je da morfologija ugljeničnih nanocevi ima značajan uticaj na njihove elektrohemijske karakteristike. Uzorak sa većim udelom ivica i defekata pokazao je bržu kinetiku prenosa naelektrisanja i veću pseudokapacitivnost. Modifikovanje oksidovanih nanocevi etilendiaminom i polimerom poli(dialildimetilamonijum-hloridom) dovodi do smanjenja aktivne površine i do sporijeg prenosa naelektrisanja. Nanočestice platine, sintetisane u rastvoru etilenglikola u mikrotalasnoj pećnici, nanete su na ispitivane ugljenične materijale. Količina nanete Pt je mnogo veća na modifikovanim nego na oksidovanim nanocevima. Aktivnost sintetisanih uzoraka za elektrohemijsku redukciju kiseonika je upoređena sa aktivnošću komercijalnog katalizatora Pt/XC-72 za istu reakciju i pokazalo se da su njihove specifične aktivnosti približno jednake.sr
dc.publisherSerbian Chemical Society
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/142048/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/142056/RS//
dc.rightsopenAccess
dc.sourceJournal of the Serbian Chemical Society
dc.subjectcarbon nanotubesen
dc.subjectmorphologyen
dc.subjectelectrochemical propertiesen
dc.subjectPt nanoparticlesen
dc.subjectelectrocatalyst for oxygen reductionen
dc.titleThe electrochemical properties of carbon nanotubes and carbon XC-72R and their application as Pt supportsen
dc.titleElektrohemijske karakteristike ugljeničnih nanocevi i ugljenika XC-72R i njihova primena u sintezi Pt katalizatorasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractОбрадовић, Маја;
dc.citation.volume75
dc.citation.issue10
dc.citation.spage1435
dc.citation.epage1439
dc.citation.other75(10): 1435-1439
dc.citation.rankM23
dc.identifier.doi10.2298/JSC100520081O
dc.identifier.rcubConv_2570
dc.identifier.fulltexthttp://cer.ihtm.bg.ac.rs//bitstream/id/9301/675.pdf
dc.identifier.scopus2-s2.0-78449305167
dc.identifier.wos000283895200012
dc.type.versionpublishedVersion


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