Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
dc.contributor.author | Cunha, Eduardo V. da | pt_BR |
dc.contributor.author | Faccin, Flavio | pt_BR |
dc.contributor.author | Moro, Celso Camilo | pt_BR |
dc.contributor.author | Benvenutti, Edilson Valmir | pt_BR |
dc.contributor.author | Castro, Sandra C. de | pt_BR |
dc.date.accessioned | 2013-07-03T01:42:39Z | pt_BR |
dc.date.issued | 2002 | pt_BR |
dc.identifier.issn | 0100-4042 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/72968 | pt_BR |
dc.description.abstract | Chloride 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.mimetype | application/pdf | |
dc.language.iso | por | pt_BR |
dc.relation.ispartof | Química nova. São Paulo. Vol. 25, n. 3 (2002), p. 392-395 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Catalisadores : Paládio | pt_BR |
dc.subject | Chloride poisoning effect | en |
dc.subject | Infrared | en |
dc.subject | Cloreto | pt_BR |
dc.subject | Espectroscopia : Infravermelho | pt_BR |
dc.subject | XPS | en |
dc.subject | Espectroscopia fotoeletrônica de raio-x | pt_BR |
dc.title | Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X | pt_BR |
dc.title.alternative | Infrared and x-ray photoelectron spectroscopy study of chloride effect in palladium catalysts | en |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000316553 | pt_BR |
dc.type.origin | Nacional | pt_BR |
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