Electrocatalysis of oxidation of hydrogen on platinum ordered intermetallic phases: Kinetic and mechanistic studies

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:26:46Z
dc.date.accessioned2022-10-05T13:20:34Z
dc.date.available2014-05-20T13:26:46Z
dc.date.available2022-10-05T13:20:34Z
dc.date.created2014-05-20T13:26:46Z
dc.date.issued2006-11-08
dc.identifierJournal of Power Sources. Amsterdam: Elsevier B.V., v. 162, n. 1, p. 151-159, 2006.
dc.identifier0378-7753
dc.identifierhttp://hdl.handle.net/11449/8675
dc.identifier10.1016/j.jpowsour.2006.06.057
dc.identifierWOS:000242059700018
dc.identifier3122186027481205
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3885234
dc.description.abstractAn experimentally based kinetic and mechanistic study of the hydrogen oxidation reaction (HOR) on platinum and platinum ordered intermetallic materials in acid medium is presented. RDE kinetic data were re-evaluated and complemented by Tafel plots obtained from chronoamperometric measurements. Among the materials evaluated, PtSb and PtSn exhibited markedly improved kinetic current densities and exchange current densities, compared to Pt in the same experimental conditions. It is proposed that the intermetallic phase enhanced the adsorptive characteristic of the surface sites and, as a consequence, improved the kinetics of the adsorption steps (Tafel or Heyrovsky) of the mechanism involved. (c) 2006 Published by Elsevier B.V.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationJournal of Power Sources
dc.relation6.945
dc.relation2,202
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectplatinum
dc.subjectordered intermetallic phase
dc.subjecthydrogen oxidation
dc.subjectkinetic
dc.subjectadsorption
dc.subjectelectronic effect
dc.titleElectrocatalysis of oxidation of hydrogen on platinum ordered intermetallic phases: Kinetic and mechanistic studies
dc.typeArtigo


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