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Elektrohemijska oksidacija metanola na katalizatoru Pt/(RuxSn1-x)O2

dc.creatorKrstajić, Mila N.
dc.creatorObradović, Maja
dc.creatorBabić, Biljana M.
dc.creatorRadmilović, Velimir R.
dc.creatorLačnjevac, Uroš
dc.creatorKrstajić, Nedeljko V.
dc.creatorGojković, Snežana Lj.
dc.date.accessioned2019-01-30T17:35:16Z
dc.date.available2019-01-30T17:35:16Z
dc.date.issued2013
dc.identifier.issn0352-5139
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/1232
dc.description.abstractRu-doped SnO2 powder, (RuxSn1-x)O2, with a Sn:Ru atomic ratio of 9:1 was synthesized and used as a support for Pt nanoparticles (30 mass % loading). The (RuxSn1-x)O2 support and the Pt/(RuxSn1-x)O2 catalyst were characterized by X-ray diffraction measurements, energy dispersive X-ray spectroscopy and transmission electron microscopy (TEM). The (RuxSn1-x)O2 was found to be a two-phase material consisting of probably a solid solution of RuO2 in SnO2 and pure RuO2. The average Pt particle size determined by TEM was 5.3 nm. Cyclic voltammetry of Pt/(RuxSn1-x)O2 indicated good conductivity of the support and displayed the usual features of Pt. The results of the electrochemical oxidation of COads and methanol on Pt/(RuxSn1-x)O2 were compared with those on commercial Pt/C and PtRu/C catalysts. Oxidation of COads on Pt/(RuxSn1-x)O2 starts at lower positive potentials than on PtRu/C and Pt/C. Potentiodynamic polarization curves and chronoamperometric curves of methanol oxidation indicated higher initial activity of the Pt/(RuxSn1-x)O2 catalyst compared to PtRu/C, but also a greater loss in current density over time. A potentiodynamic stability test of the catalysts revealed that deactivation of Pt/(RuxSn1-x)O2 and Pt/C was primarily caused by poisoning of the Pt surface by residues of methanol oxidation, which mostly occurred during the first potential cycle. In the case of PtRu/C, the poisoning of the surface was minor and deactivation was caused by surface area loss of the PtRu.en
dc.description.abstractSintetizovan je prah SnO2 dopovan rutenijumom, (RuxSn1-x)O2, sa atomskim odnosom Sn:Ru od 9:1, i korišćen kao nosač nanočestica platine. Udeo Pt u dobijenom katalizatoru, Pt/(RuxSn1-x)O2, bio je 30 mas. %. Nosač i katalizator su karakterisani difrakcijom X-zraka, energetski disperzivnom spektroskopijom X-zraka i transmisionom elektronskom mikroskopijom (TEM). Pokazano je da je (RuxSn1-x)O2 dvofazni materijal koji verovatno sadrži čvrst rastvor RuO2 u SnO2 i čist RuO2. Prosečna veličina zrna Pt, određena TEM analizom, iznosi 5,3 nm. Ciklična voltametrija Pt/(RuxSn1-x)O2 ukazala je na dobru provodnost nosača katalizatora i na uobičajene karakteristike Pt. Upoređeni su rezultati elektrohemijske oksidacije COads na Pt/(RuxSn1-x)O2, Pt/C i PtRu/C. Oksidacija COads na Pt/(RuxSn1-x)O2 počinje na negativnijim potencijalima u odnosu na PtRu/C i Pt/C. Potenciodinamičke polarizacione krive i hronoamperometrijske krive za oksidaciju metanola ukazuju na veću početnu aktivnost katalizatora Pt/(RuxSn1-x)O2 u odnosu na PtRu/C, ali i na veće smanjenje gustine struje tokom vremena. Test potenciodinamičke stabilnosti katalizatora je ukazao da je smanjenje aktivnosti Pt/(RuxSn1-x)O2 i Pt/C prvenstveno prouzrokovano trovanjem površine Pt proizvodima nepotpune oksidacije metanola, koje se uglavnom odigrava tokom prvog ciklusa. Kod PtRu/C trovanje površine je minimalno, a smanjenje aktivnosti je prouzrokovano smanjenjem elektrohemijski aktivne površine PtRu.sr
dc.publisherSerbian Chemical Society
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172054/RS//
dc.rightsopenAccess
dc.sourceJournal of the Serbian Chemical Society
dc.subjectmethanol oxidationen
dc.subjectCO oxidationen
dc.subjectplatinumen
dc.subjectRu-doped SnO2en
dc.subjectelectrocatalysisen
dc.subjectfuel cellen
dc.titleElectrochemical oxidation of methanol on Pt/(RuxSn1-x)O2 nanocatalysten
dc.titleElektrohemijska oksidacija metanola na katalizatoru Pt/(RuxSn1-x)O2sr
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractОбрадовић, Маја; Гојковиц, Снезана Љ.; Крстајић, Недељко В.; Крстајић, Мила Н.; Лацњевац, Урос Ц.; Бабиц, Биљана М.; Радмиловиц, Велимир Р.;
dc.citation.volume78
dc.citation.issue11
dc.citation.spage1703
dc.citation.epage1716
dc.citation.other78(11): 1703-1716
dc.citation.rankM23
dc.identifier.doi10.2298/JSC130718091K
dc.identifier.rcubConv_3089
dc.identifier.fulltexthttp://cer.ihtm.bg.ac.rs//bitstream/id/7745/1230.pdf
dc.identifier.scopus2-s2.0-84888124242
dc.identifier.wos000329265400007
dc.type.versionpublishedVersion


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