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dc.contributor.authorMiranda Morales, Bárbara C.
dc.contributor.authorChimentao, Ricardo J
dc.contributor.authorSzanyi, J
dc.contributor.authorBraga, A.H.
dc.contributor.authorSantos, Jeannette B O
dc.contributor.authorGispert Guirado, Francesc
dc.contributor.authorLlorca Piqué, Jordi
dc.contributor.authorMedina Cabello, Francisco
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Tècniques Energètiques
dc.date.accessioned2015-10-20T11:56:57Z
dc.date.available2016-05-02T00:30:52Z
dc.date.created2015-05-01
dc.date.issued2015-05-01
dc.identifier.citationMiranda, B., Chimentao, R., Szanyi, J., Braga, A., Santos, J., Gispert, F., Llorca, J., Medina Cabello, Francisco. Influence of copper on nickel-based catalysts in the conversion of glycerol. "Applied catalysis B. Environmental", 01 Maig 2015, vol. 166, p. 166-180.
dc.identifier.issn0926-3373
dc.identifier.urihttp://hdl.handle.net/2117/77963
dc.description.abstractThe catalytic transformation of glycerol to value-added compounds was investigated over bimetallic Ni-Cu/gamma-Al2O3 catalysts with Ni/Cu atomic ratios of 8/1, 4/1, 2/1, 1/1, 1/2, 1/4, and 1/8. XPS analysis revealed that the surface composition of the catalyst exhibited progressive enrichment of Cu as its content in the catalyst increased. H-2-chemisorption indicated that the total number of exposed Ni atoms decreased as the Cu content increased. As a result, deep hydrogenolysis to produce CH4 was inhibited by the addition of Cu to the Ni catalyst, yielding higher selectivity toward the dehydration products of glycerol such as hydroxyacetone.; FTIR spectra of adsorbed CO reveal that Cu asserts both geometric and electronic effects on the adsorption properties of Ni. The geometrical effect is visualized by the progressive disappearance of the bridge bound adsorbed CO on metallic Ni by the incorporation of Cu. This suggests that the deep hydrogenolysis of glycerol to CH4 formation requires an ensemble of adjacent active Ni atoms. The electronic effect of Cu on Ni is indicated by the red shift of the IR peak of adsorbed CO as the Cu content increases. The electronic interaction between Cu and Ni species was also substantiated by XANES results. HTREM revealed metal particles very well distributed on the support with particle size of 1.5 to 5 nm. The Ni Cu samples were not a total intermetallic alloys. (C) 2014 Elsevier B.V. All rights reserved.
dc.format.extent15 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subjectÀrees temàtiques de la UPC::Física::Física molecular
dc.subject.lcshCopper
dc.subject.lcshNuclear physics
dc.subject.otherHydrogenolysis
dc.subject.otherDehydration
dc.subject.otherGlycerol
dc.subject.otherNickel
dc.subject.otherCopper
dc.subject.otherEthanol
dc.titleInfluence of copper on nickel-based catalysts in the conversion of glycerol
dc.typeArticle
dc.subject.lemacCoure
dc.subject.lemacFísica nuclear
dc.contributor.groupUniversitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia
dc.identifier.doi10.1016/j.apcatb.2014.11.019
dc.rights.accessOpen Access
local.identifier.drac15465288
dc.description.versionPostprint (published version)
local.citation.authorMiranda, B.; Chimentao, R.; Szanyi, J.; Braga, A.; Santos, J.; Gispert, F.; Llorca, J.; Medina Cabello, Francisco
local.citation.publicationNameApplied catalysis B. Environmental
local.citation.volume166
local.citation.startingPage166
local.citation.endingPage180


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