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dc.creatorVukovic, Goran D.
dc.creatorObradović, Maja
dc.creatorMarinković, Aleksandar D.
dc.creatorRogan, Jelena R.
dc.creatorUskoković, Petar S.
dc.creatorRadmilović, Velimir R.
dc.creatorGojković, Snežana Lj.
dc.date.accessioned2019-01-30T17:26:02Z
dc.date.available2019-01-30T17:26:02Z
dc.date.issued2011
dc.identifier.issn0254-0584
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/801
dc.description.abstractMulti-walled carbon nanotubes (MWCNTs) were used as a support for Pt nanoparticles prepared by the microwave-assisted polyol method. The MWCNTs were pretreated by chemical oxidation (o-MWCNTs) followed by modification by ethylenediamine (eda-MWCNTs). Characterization of both oxidized and eda-modified materials by UV-spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy revealed that the modification by eda leads to (i) agglomeration of the MWCNTs, (ii) a decrease in the capacitance of the material and (iii) reduced rate of electron transfer between the MWCNTs and solution species. However, the Pt loading of Pt/o-MWCNTs was only 2 mass% while the loading of Pt/eda-MWCNTs was 20 mass%. Much higher efficiency of Pt deposition on eda-MWCNTs than on o-MWCNTs was ascribed to the shift in pH(pzc) value of the MWCNT surface from 2.43 to 5.91 upon modification by eda. Transmission electron microscopy revealed that the mean diameter of the Pt particles in Pt/eda-MWCNTs is 2.5 +/- 0.5 nm and that their distribution on the support is homogenous with no evidence of pronounced particle agglomeration. Cyclic voltammetry of a Pt/eda-MWCNT thin film indicated a clean Pt surface with well-resolved peaks characteristic of polycrystalline Pt. Its electrocatalytic activity for oxygen reduction was examined and the results corresponded to the commercial Pt nanocatalyst. This study shows that modification of o-MWCNTs by eda helps to achieve homogenous distribution of small Pt nanoparticles and does not impede its electrocatalytic activity.en
dc.publisherElsevier Science Sa, Lausanne
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172054/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS//
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/245916/EU//
dc.relationU.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering - DE-AC02-05CH11231
dc.rightsrestrictedAccess
dc.sourceMaterials Chemistry and Physics
dc.subjectNanostructuresen
dc.subjectElectrochemical propertiesen
dc.subjectDTAen
dc.subjectTEMen
dc.titleEthylenediamine-modified multiwall carbon nanotubes as a Pt catalyst supporten
dc.typearticle
dc.rights.licenseARR
dcterms.abstractГојковиц, Снезана Љ.; Ускоковић, Петар С.; Радмиловиц, Велимир Р.; Роган, Јелена Р.; Обрадовић, Маја; Вуковиц, Горан Д.; Маринковиц, Aлександар Д.;
dc.citation.volume130
dc.citation.issue1-2
dc.citation.spage657
dc.citation.epage664
dc.citation.other130(1-2): 657-664
dc.citation.rankM21
dc.identifier.doi10.1016/j.matchemphys.2011.07.046
dc.identifier.scopus2-s2.0-80052575240
dc.identifier.wos000295601700104
dc.type.versionpublishedVersion


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