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dc.contributor.authorCunha, Eduardo V. dapt_BR
dc.contributor.authorFaccin, Flaviopt_BR
dc.contributor.authorMoro, Celso Camilopt_BR
dc.contributor.authorBenvenutti, Edilson Valmirpt_BR
dc.contributor.authorCastro, Sandra C. dept_BR
dc.date.accessioned2013-07-03T01:42:39Zpt_BR
dc.date.issued2002pt_BR
dc.identifier.issn0100-4042pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/72968pt_BR
dc.description.abstractChloride poisoning is known as having an inhibitor effect in the activity of metal catalysis. In this work in situ infrared spectroscopy (FTIR) of adsorbed carbon monoxide and x-ray photoelectron spectroscopy (XPS) were used to investigate the effect of chloride presence in the electronic metal density in the d subshell of palladium dispersed on alumina. The chloride poisoning effect was interpreted as an electronic effect since a weak back-bonded Pd-CO was formed due to the decrease in the electronic density of the d subshell of palladium, which could be also detected by the higher Pd 3d5/2 binding energy in the chloride presence. A similar poisoning effect was also observed for chloride free Pd/Al2O3 reduced at 500 ºC, and it was interpreted based on the interaction of metal with the alumina surface. The use of molybdena/alumina binary system as support, yield a contrary effect due to the metal-support interaction.en
dc.format.mimetypeapplication/pdf
dc.language.isoporpt_BR
dc.relation.ispartofQuímica nova. São Paulo. Vol. 25, n. 3 (2002), p. 392-395pt_BR
dc.rightsOpen Accessen
dc.subjectCatalisadores : Paládiopt_BR
dc.subjectChloride poisoning effecten
dc.subjectInfrareden
dc.subjectCloretopt_BR
dc.subjectEspectroscopia : Infravermelhopt_BR
dc.subjectXPSen
dc.subjectEspectroscopia fotoeletrônica de raio-xpt_BR
dc.titleEstudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios Xpt_BR
dc.title.alternativeInfrared and x-ray photoelectron spectroscopy study of chloride effect in palladium catalysts en
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000316553pt_BR
dc.type.originNacionalpt_BR


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