Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X

Detalhes bibliográficos
Autor(a) principal: Cunha, Eduardo V. da
Data de Publicação: 2002
Outros Autores: Faccin, Flavio, Moro, Celso Camilo, Benvenutti, Edilson Valmir, Castro, Sandra C. de
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/72968
Resumo: 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.
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spelling Cunha, Eduardo V. daFaccin, FlavioMoro, Celso CamiloBenvenutti, Edilson ValmirCastro, Sandra C. de2013-07-03T01:42:39Z20020100-4042http://hdl.handle.net/10183/72968000316553Chloride 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.application/pdfporQuímica nova. São Paulo. Vol. 25, n. 3 (2002), p. 392-395Catalisadores : PaládioCloretoEspectroscopia : InfravermelhoEspectroscopia fotoeletrônica de raio-xChloride poisoning effectInfraredXPSEstudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios XInfrared and x-ray photoelectron spectroscopy study of chloride effect in palladium catalysts info:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000316553.pdf000316553.pdfTexto completoapplication/pdf116204http://www.lume.ufrgs.br/bitstream/10183/72968/1/000316553.pdf4b282704e030aecc5d292fd0249549f2MD51TEXT000316553.pdf.txt000316553.pdf.txtExtracted Texttext/plain20863http://www.lume.ufrgs.br/bitstream/10183/72968/2/000316553.pdf.txt45deea72bfc84ffaece0dd4b4b338cf8MD52THUMBNAIL000316553.pdf.jpg000316553.pdf.jpgGenerated Thumbnailimage/jpeg1937http://www.lume.ufrgs.br/bitstream/10183/72968/3/000316553.pdf.jpg69ccf444001df3a29f2f6360a747f5beMD5310183/729682018-10-15 08:05:54.597oai:www.lume.ufrgs.br:10183/72968Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-15T11:05:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
dc.title.alternative.en.fl_str_mv Infrared and x-ray photoelectron spectroscopy study of chloride effect in palladium catalysts
title Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
spellingShingle Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
Cunha, Eduardo V. da
Catalisadores : Paládio
Cloreto
Espectroscopia : Infravermelho
Espectroscopia fotoeletrônica de raio-x
Chloride poisoning effect
Infrared
XPS
title_short Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
title_full Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
title_fullStr Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
title_full_unstemmed Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
title_sort Estudo do efeito do cloreto em catalisadores de paládio usando a análise no infravermelho e de fotoelétrons excitados por raios X
author Cunha, Eduardo V. da
author_facet Cunha, Eduardo V. da
Faccin, Flavio
Moro, Celso Camilo
Benvenutti, Edilson Valmir
Castro, Sandra C. de
author_role author
author2 Faccin, Flavio
Moro, Celso Camilo
Benvenutti, Edilson Valmir
Castro, Sandra C. de
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Cunha, Eduardo V. da
Faccin, Flavio
Moro, Celso Camilo
Benvenutti, Edilson Valmir
Castro, Sandra C. de
dc.subject.por.fl_str_mv Catalisadores : Paládio
Cloreto
Espectroscopia : Infravermelho
Espectroscopia fotoeletrônica de raio-x
topic Catalisadores : Paládio
Cloreto
Espectroscopia : Infravermelho
Espectroscopia fotoeletrônica de raio-x
Chloride poisoning effect
Infrared
XPS
dc.subject.eng.fl_str_mv Chloride poisoning effect
Infrared
XPS
description 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.
publishDate 2002
dc.date.issued.fl_str_mv 2002
dc.date.accessioned.fl_str_mv 2013-07-03T01:42:39Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/72968
dc.identifier.issn.pt_BR.fl_str_mv 0100-4042
dc.identifier.nrb.pt_BR.fl_str_mv 000316553
identifier_str_mv 0100-4042
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url http://hdl.handle.net/10183/72968
dc.language.iso.fl_str_mv por
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dc.relation.ispartof.pt_BR.fl_str_mv Química nova. São Paulo. Vol. 25, n. 3 (2002), p. 392-395
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