Interplay between particle size, composition, and structure of MgAl2O4-supported Co-Cu catalysts and their influence on carbon accumulation during steam reforming of ethanol

dc.creatorAvila-Neto, CN
dc.creatorZanchet, D
dc.creatorHori, CE
dc.creatorRibeiro, RU
dc.creatorBueno, JMC
dc.date2013
dc.dateNOV
dc.date2014-07-30T14:34:02Z
dc.date2015-11-26T16:09:34Z
dc.date2014-07-30T14:34:02Z
dc.date2015-11-26T16:09:34Z
dc.date.accessioned2018-03-28T22:58:09Z
dc.date.available2018-03-28T22:58:09Z
dc.identifierJournal Of Catalysis. Academic Press Inc Elsevier Science, v. 307, n. 222, n. 237, 2013.
dc.identifier0021-9517
dc.identifier1090-2694
dc.identifierWOS:000327903900025
dc.identifier10.1016/j.jcat.2013.07.025
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/60483
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/60483
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1266653
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionThe effect of Cu/Co ratio on the structure of MgAl2O4-supported Cu-Co nanoparticles, and on their catalytic properties during steam reforming of ethanol (SRE), was studied using a series of ex situ and in situ techniques. X-ray photoelectron spectroscopy (XPS) analyses showed that Cu atoms migrated to the surfaces of reduced nanoparticles. Extended X-ray absorption fine structure (EXAFS) data revealed the formation of Cu-Co alloy. The size and structure of the nanoparticles were estimated by development of a model based on the EXAFS and XPS data, considering the nanoparticles to be spherical with reduced cores and oxidized shells. It was found that both the reduced core and nanoparticles size were dependent on the Cu/Co ratio. The observed apparent dependence of carbon accumulation rate during SRE (r(carbon,SRE)) on Co-Cu crystallite size was mainly associated with the presence of the element in an oxidized state and with the nature of the metal on the nanoparticle surface. (C) 2013 Elsevier Inc. All rights reserved.
dc.description307
dc.description222
dc.description237
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionBrazilian Synchrotron Light Laboratory (LNLS) for the XAS beamline experiments [D06A-DXAS 10156, D04B-XAFS1]
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCNPq [proc. 472050/2011-7]
dc.descriptionFAPESP [proc. 2011/50727-9]
dc.descriptionBrazilian Synchrotron Light Laboratory (LNLS) for the XAS beamline experiments [D06A-DXAS 10156, D04B-XAFS1]
dc.languageen
dc.publisherAcademic Press Inc Elsevier Science
dc.publisherSan Diego
dc.publisherEUA
dc.relationJournal Of Catalysis
dc.relationJ. Catal.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectSteam reforming of ethanol
dc.subjectHydrogen production
dc.subjectCobalt-supported catalysts
dc.subjectIn situ EXAFS
dc.subjectCrystallite size
dc.subjectCobalt-copper alloy
dc.subjectAbsorption Fine-structure
dc.subjectFischer-tropsch Synthesis
dc.subjectCobalt-based Catalysts
dc.subjectWater-gas-shift
dc.subjectHydrogen-production
dc.subjectSupported Catalysts
dc.subjectBio-ethanol
dc.subjectMagnetic Characterization
dc.subjectSurface Segregation
dc.subjectShell Nanoparticles
dc.titleInterplay between particle size, composition, and structure of MgAl2O4-supported Co-Cu catalysts and their influence on carbon accumulation during steam reforming of ethanol
dc.typeArtículos de revistas


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