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dc.contributor.authorSoler Turu, Lluís
dc.contributor.authorCasanovas Grau, Albert
dc.contributor.authorRyan, James
dc.contributor.authorAngurell Purroy, Inmaculada
dc.contributor.authorEscudero, Carlos
dc.contributor.authorPérez Dieste, Virginia
dc.contributor.authorLlorca Piqué, Jordi
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Tècniques Energètiques
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2019-05-30T09:20:11Z
dc.date.issued2019-04-05
dc.identifier.citationSoler, L. [et al.]. Dynamic reorganization of bimetallic nanoparticles under reaction depending on the support nanoshape: the case of RhPd over ceria nanocubes and nanorods under ethanol steam reforming. "ACS catalysis", 5 Abril 2019, vol. 9, núm. April, p. 3641-3647.
dc.identifier.issn2155-5435
dc.identifier.urihttp://hdl.handle.net/2117/133686
dc.description.abstractBimetallic catalysts exhibit high performance compared to that of their monometallic counterparts in a wide range of catalytic reactions. Both geometric and electronic phenomena yield unique properties that cannot be reproduced by other means. Bimetallic nanoparticles reorganize dynamically under reaction conditions, usually forming complex core-shell distributions of metals and oxidation states. This reorganization is even more complex in the presence of a reducible support. Here we show by operando ambient pressure X-ray photoelectron spectroscopy (AP-XPS) that the shape of the support also plays a crucial role in the reorganization of bimetallic nanoparticles, which has important consequences for catalytic performance. We have monitored the surface composition and oxidation states of preformed Rh0.5Pd0.5 model nanoparticles of 4 nm in size supported over CeO2 nanocubes and CeO2 nanorods during the catalytic steam reforming of ethanol (ESR) at 823 K. Over Rh0.5Pd0.5/CeO2-nanocubes, both rhodium and palladium become strongly oxidized and ethanol mainly dehydrogenates into acetaldehyde and H2. In contrast, over Rh0.5Pd0.5/CeO2-nanorods, there is an enrichment of Pd toward the surface, both palladium and rhodium undergo significant reduction, and ethanol is reformed efficiently.
dc.format.extent7 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Química inorgànica
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshNanoparticles
dc.subject.lcshCatalysis
dc.subject.lcshCatalysts
dc.subject.otherNanoshaped ceria
dc.subject.otherOperando AP-XPS
dc.subject.otherMetal-support Interaction
dc.subject.otherHeterogeneous catalysis
dc.subject.otherRhodium
dc.subject.otherPalladium
dc.titleDynamic reorganization of bimetallic nanoparticles under reaction depending on the support nanoshape: the case of RhPd over ceria nanocubes and nanorods under ethanol steam reforming
dc.typeArticle
dc.subject.lemacNanopartícules
dc.subject.lemacCatàlisi
dc.subject.lemacCatalitzadors
dc.contributor.groupUniversitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia
dc.identifier.doi10.1021/acscatal.9b00463
dc.relation.publisherversionhttps://pubs.acs.org/doi/abs/10.1021/acscatal.9b00463
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac24251973
dc.description.versionPostprint (author's final draft)
dc.date.lift10000-01-01
local.citation.authorSoler, L.; Casanovas, A.; Ryan, J.; Angurell, I.; Escudero, C.; Pérez-Dieste, V.; Llorca, J.
local.citation.publicationNameACS catalysis
local.citation.volume9
local.citation.numberApril
local.citation.startingPage3641
local.citation.endingPage3647


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Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain