Carbon-supported Pt-Co catalysts prepared by a modifled polyol process as cathodes for PEM fuel cells

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSantiago, Elisabete I.
dc.creatorVaranda, Laudemir C.
dc.creatorVillullas, H. Mercedes
dc.date2014-05-20T14:18:01Z
dc.date2016-10-25T17:40:18Z
dc.date2014-05-20T14:18:01Z
dc.date2016-10-25T17:40:18Z
dc.date2007-02-22
dc.date.accessioned2017-04-05T22:26:52Z
dc.date.available2017-04-05T22:26:52Z
dc.identifierJournal of Physical Chemistry C. Washington: Amer Chemical Soc, v. 111, n. 7, p. 3146-3151, 2007.
dc.identifier1932-7447
dc.identifierhttp://hdl.handle.net/11449/25419
dc.identifierhttp://acervodigital.unesp.br/handle/11449/25419
dc.identifier10.1021/jp0670081
dc.identifierWOS:000245005800043
dc.identifierhttp://dx.doi.org/10.1021/jp0670081
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/870308
dc.descriptionIn this work, carbon-supported Pt70Co30 nanoparticles were prepared by a polyol process using a long-chain diol as reducer (hexadecanediol) and oleic acid and oleylamine as stabilizers. Depending on the synthesis conditions, Pt70Co30/C nanocatalysts with very small particle size (1.9 +/- 0.2 nm) and narrow distribution homogeneously dispersed on the carbon support and having a high degree of alloying without the need of thermal treatments were obtained. The as-prepared catalyst presents an excellent performance as proton exchange membrane fuel cells (PEMFC) cathode material. In terms of mass activity (MA), the Pt70Co30/C electrocatalysts produced single fuel cell polarization response superior to that of commercial catalyst. To analyze alloying effects, the result of thermal treatment at low temperatures (200-400 degrees C) was also evaluated and an increase of average crystallite size and a lower degree of alloying, probably associated to cobalt oxidation, were evidenced.
dc.languageeng
dc.publisherAmer Chemical Soc
dc.relationJournal of Physical Chemistry C
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleCarbon-supported Pt-Co catalysts prepared by a modifled polyol process as cathodes for PEM fuel cells
dc.typeOtro


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