Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/101416
Type: Artigo de periódico
Title: Infrared And X-ray Photoelectron Spectroscopy Study Of Chloride Effect In Palladium Catalysts [estudo Do Efeito Do Cloreto Em Catalisadores De Paládio Usando A Análise No Infravermelho E De Fotoelétrons Excitados Por Raios X]
Author: Cunha E.V.
Faccin F.
Moro C.C.
Benvenutti E.V.
De Castro S.C.
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 3d 5/2 binding energy in the chloride presence. A similar poisoning effect was also observed for chloride free Pd/Al 2O 3 reduced at 500°C, 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.
Editor: 
Rights: aberto
Identifier DOI: 
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0036586924&partnerID=40&md5=0dd149fb803e65fb9c9965fb96fd654d
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-0036586924.pdf115.09 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.