Correlation of Sol–Gel Alumina-Supported Cobalt Catalyst Processing to Cobalt Speciation, Ethanol Steam Reforming Activity, and Stability

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dc.contributor.authorPassos, Aline R. [UNESP]
dc.contributor.authorMartins, Leandro [UNESP]
dc.contributor.authorPulcinelli, Sandra H. [UNESP]
dc.contributor.authorSantilli, Celso V. [UNESP]
dc.contributor.authorBriois, Valérie
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionSynchrotron SOLEIL
dc.date.accessioned2018-12-11T17:33:58Z
dc.date.available2018-12-11T17:33:58Z
dc.date.issued2017-10-23
dc.description.abstractThe effect of sol–gel alumina characteristics on the supported Co catalyst properties was investigated at the different steps of catalyst preparation. Porous alumina with variable surface reactivity were prepared from the sol–gel transition and the spinodal decomposition induced by polymers. The hydrophobicity of polymer or the calcination temperature controls the amount of the hydroxyl groups. The dried catalysts are composed of cobalt alumina hydrotalcite-like compounds up to 64 %. After calcination, higher proportions of CoAl2O4 are observed in the alumina presenting a greater content of hydroxyl and hydrotalcite. The Co speciation during activation investigated by Quick X-ray absorption spectroscopy evidences that both Co3O4 and CoAl2O4 are first fully reduced to CoO and then partially transformed into point-like Co0 nucleus. The catalysts were highly active in the ethanol steam reforming reaction; however, coke deposition leads to deactivation. This deleterious effect was minimized for catalysts operating with a CoO/Co0 ratio close to 1:3.en
dc.description.affiliationSão Paulo State University (Unesp) Institute of Chemistry, Rua Professor Francisco Degni, 55
dc.description.affiliationSynchrotron SOLEIL, L'Orme des Merisiers, BP48, Saint Aubin
dc.description.affiliationUnespSão Paulo State University (Unesp) Institute of Chemistry, Rua Professor Francisco Degni, 55
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent3918-3929
dc.identifierhttp://dx.doi.org/10.1002/cctc.201700319
dc.identifier.citationChemCatChem, v. 9, n. 20, p. 3918-3929, 2017.
dc.identifier.doi10.1002/cctc.201700319
dc.identifier.issn1867-3899
dc.identifier.issn1867-3880
dc.identifier.lattes5782696565602340
dc.identifier.lattes5584298681870865
dc.identifier.orcid0000-0002-8356-8093
dc.identifier.scopus2-s2.0-85028942504
dc.identifier.urihttp://hdl.handle.net/11449/179153
dc.language.isoeng
dc.relation.ispartofChemCatChem
dc.relation.ispartofsjr1,695
dc.relation.ispartofsjr1,695
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectaluminum
dc.subjectcobalt
dc.subjectsupported catalysts
dc.subjectsurface analysis
dc.subjectX-ray absorption spectroscopy
dc.titleCorrelation of Sol–Gel Alumina-Supported Cobalt Catalyst Processing to Cobalt Speciation, Ethanol Steam Reforming Activity, and Stabilityen
dc.typeArtigo
unesp.author.lattes5782696565602340
unesp.author.lattes5584298681870865[4]
unesp.author.orcid0000-0003-2889-941X[1]
unesp.author.orcid0000-0002-8356-8093[4]

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