Enhanced catalytic activity and stability for the electrooxidation of formic acid on lead modified shape controlled platinum nanoparticles

Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10045/62327
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Campo DCValorIdioma
dc.contributorElectroquímica de Superficieses_ES
dc.contributorElectroquímica Aplicada y Electrocatálisises_ES
dc.contributor.authorPerales-Rondón, Juan V.-
dc.contributor.authorSolla-Gullón, José-
dc.contributor.authorHerrero, Enrique-
dc.contributor.authorSánchez-Sánchez, Carlos M.-
dc.contributor.otherUniversidad de Alicante. Departamento de Química Físicaes_ES
dc.contributor.otherUniversidad de Alicante. Instituto Universitario de Electroquímicaes_ES
dc.date.accessioned2017-01-27T17:15:58Z-
dc.date.available2017-01-27T17:15:58Z-
dc.date.issued2017-02-
dc.identifier.citationApplied Catalysis B: Environmental. 2017, 201: 48-57. doi:10.1016/j.apcatb.2016.08.011es_ES
dc.identifier.issn0926-3373 (Print)-
dc.identifier.issn1873-3883 (Online)-
dc.identifier.urihttp://hdl.handle.net/10045/62327-
dc.description.abstractHigh catalytic activity for formic acid oxidation reaction (FAOR) is demonstrated in Pb modified shape-controlled Pt nanoparticles (NPs). Cyclic voltammetry is used to follow the effective modification of Pt NPs by Pb. Octahedral shaped Pt NPs (having a (111) preferential surface structure) modified by Pb are proved the most active electrocatalyst studied towards FAOR and display a catalytic activity of c.a. 7 mA cm−2 at 0.5 V in 0.1 M formic acid solution. This current density represents an enhancement factor of 29.5 with respect to the unmodified Pt NPs and this is 2.7 and 2.3 times higher than that found on Tlθ/100-Pt NPs and Sbθ/111-Pt NPs, respectively, some of the most active electrocatalysts based on adatoms modified Pt NPs reported so far. This outstanding activity is displayed at maximum Pb coverage and also confers a wide electrocatalyst stability over the entire potential range studied. FAOR is also studied using scanning electrochemical microscopy (SECM) by the micropipette delivery/substrate collection (MD/SC) working mode as a preliminary rapid test to identify active electrocatalysts. In particular, the remarkable activity enhancement exhibited by a Pt ultramicroelectrode (100 μm diameter) modified by Pb is rapidly imaged by SECM providing preliminary catalyst performance information. Thus, this technique emerges as a suitable and fast method to test, and in some cases quantify, catalyst activity for reactions of interest in fuel cell applications.es_ES
dc.description.sponsorshipThis work has been financially supported by the MICINN (Spain)(projects CTQ2013-44083-P and CTQ2013-48280-C3-3-R), Generalitat Valenciana (project PROMETEOII/2014/013, FEDER) and CNRS (project Défi Instrumentation aux limites 2015).es_ES
dc.languageenges_ES
dc.publisherElsevieres_ES
dc.rights© 2016 Elsevier B.V.es_ES
dc.subjectShape-controlled Pt nanoparticleses_ES
dc.subjectPb adsorptiones_ES
dc.subjectPb modified electrodeses_ES
dc.subjectFormic acid oxidationes_ES
dc.subjectSECMes_ES
dc.subject.otherQuímica Físicaes_ES
dc.titleEnhanced catalytic activity and stability for the electrooxidation of formic acid on lead modified shape controlled platinum nanoparticleses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.peerreviewedsies_ES
dc.identifier.doi10.1016/j.apcatb.2016.08.011-
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.apcatb.2016.08.011es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO//CTQ2013-44083-P-
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO//CTQ2013-48280-C3-3-R-
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