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Enhancement of oxidation of dimethyl ether through formation of hybrid electrocatalysts composed of Vulcan-supported PtSn decorated with Ru-black or PtRu nanoparticles

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cris.lastimport.scopus2024-02-12T20:38:52Z
dc.abstract.enElectrocatalytic activity of Vulcan-supported PtSn (PtSn/C) nanostructured alloys toward electrooxidation of dimethyl ether (DME), a potential small-organic-molecule fuel, has been significantly enhanced in acid medium (0.5 mol dm−3 H2SO4) by decorating PtSn/C with ruthenium black or bimetallic PtRu nanoparticles. The enhancement effect concerns both shifting the onset potential for the DME-oxidation toward less positive values and increase of the DME electrocatalytic current densities recorded under both cyclic voltammetric and chronoamperometric conditions. The activating capabilities of ruthenium nanostructures seem to originate from the existence of reactive ruthenium oxo/hydroxo groups (even below 0.45 V vs. RHE) on their surfaces capable of inducing the oxidative removal of poisoning (CO-type) adsorbates from the neighboring platinum catalytic sites. In that respect, the Ru-oxo species originating from Ru or PtRu additives seem to support activity of Sn cocatalytic sites interacting with Pt within the PtSn heterogenous alloy. The Ru-decorated PtSn/C and, in particular, PtSn/C admixed with PtRu exhibit very high activity toward the oxidation of methanol which is also an important DME-oxidation intermediate. On the whole, the hybrid materials composed of Vulcan-supported PtSn decorated with Ru or PtRu nanoparticles seem to act as multifunctional nanoreactors inducing not only oxidative stripping of poisoning adsorbates but also catalyzing oxidation of the DME-reaction intermediates (methanol).
dc.affiliationUniwersytet Warszawski
dc.contributor.authorRytelewska, Beata
dc.contributor.authorRutkowska, Iwona
dc.contributor.authorKulesza, Paweł
dc.date.accessioned2024-01-24T22:48:30Z
dc.date.available2024-01-24T22:48:30Z
dc.date.copyright2021-10-19
dc.date.issued2021
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.versionFINAL_PUBLISHED
dc.description.volume400
dc.identifier.doi10.1016/J.ELECTACTA.2021.139437
dc.identifier.issn0013-4686
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/106230
dc.identifier.weblinkhttps://api.elsevier.com/content/article/PII:S0013468621017278?httpAccept=text/xml
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofElectrochimica Acta
dc.relation.pages139437
dc.rightsCC-BY-ND
dc.sciencecloudnosend
dc.subject.enCatalytic electrooxidation
dc.subject.enDimethyl ether
dc.subject.enMethanol
dc.subject.enPt
dc.subject.enPtRu and PtSn nanoparticles
dc.subject.enRuthenium black
dc.titleEnhancement of oxidation of dimethyl ether through formation of hybrid electrocatalysts composed of Vulcan-supported PtSn decorated with Ru-black or PtRu nanoparticles
dc.typeJournalArticle
dspace.entity.typePublication