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dc.creatorKrstajić-Pajić, Mila
dc.creatorStevanović, Sanja
dc.creatorRadmilović, Vuk
dc.creatorGavrilović-Wohlmuther, Aleksandra
dc.creatorZabinski, Piotr
dc.creatorElezović, Nevenka R.
dc.creatorRadmilović, Velimir R.
dc.creatorGojković, Snežana
dc.creatorJovanović, Vladislava M.
dc.date.accessioned2021-03-10T14:12:03Z
dc.date.available2021-03-10T14:12:03Z
dc.date.issued2019
dc.identifier.issn0926-3373
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/4330
dc.description.abstractLow loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.en
dc.publisherElsevier Science Bv, Amsterdam
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172060/RS//
dc.relationSerbian Academy of Sciences and Arts [F-141]
dc.relationCOST ActionEuropean Cooperation in Science and Technology (COST) [MP1407-STSM, COST-STSM-MP1407-35830]
dc.rightsopenAccess
dc.sourceApplied Catalysis B-Environmental
dc.subjectPtAu nanoparticlesen
dc.subjectMicroemulsion methoden
dc.subjectFormic acid electrooxidationen
dc.subjectMethanol electrooxidationen
dc.titleDispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion methoden
dc.typearticle
dc.rights.licenseARR
dc.citation.epage593
dc.citation.other243: 585-593
dc.citation.rankaM21
dc.citation.spage585
dc.citation.volume243
dc.identifier.doi10.1016/j.apcatb.2018.10.064
dc.identifier.fulltexthttp://TechnoRep.tmf.bg.ac.rs/bitstream/id/1964/4327.pdf
dc.identifier.rcubconv_5733
dc.identifier.scopus2-s2.0-85056487106
dc.identifier.wos000453616800060
dc.type.versionpublishedVersion


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