A spectroscopic study of Au/CeXZr1-XO2 catalysts
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFBA |
Texto Completo: | http://www.repositorio.ufba.br/ri/handle/ri/6895 |
Resumo: | p.141-145 |
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Ferreira, Hadma SousaVarela, Maria do Carmo Rangel SantosFerreira, Márcio Luís OliveiraPepe, Iuri MunizSilva, Antônio Ferreira daFerreira, Hadma SousaVarela, Maria do Carmo Rangel SantosFerreira, Márcio Luís OliveiraPepe, Iuri MunizSilva, Antônio Ferreira da2012-10-08T18:33:43Z2012-10-08T18:33:43Z2009-040103-9733http://www.repositorio.ufba.br/ri/handle/ri/6895v. 39, n. 1p.141-145The nature of gold species in Au/CeXZr1-XO2 catalysts was successfully investigated using the visible and near infrared photoacoustic spectroscopy and Fourier transform infrared spectroscopy of adsorbed carbon monoxide. It was found that the visible and near infrared photoacoustic spectroscopy is a powerful technique for investigating the changes of gold particle size due to addition of zirconium and the oxidation state of gold particles. It was also noted that the increase of zirconium in the solids makes gold incorporation more difficult due to the electronic shielding caused by zirconium, decreasing the probability of replacing cerium by gold. For the samples studied, the particle size ranged from 20-30 nm and the Au+, Au3+ and Auº species were found in the catalysts.Submitted by Texeira Ana (atanateixeira@gmail.com) on 2012-10-08T18:33:43Z No. of bitstreams: 1 Ferreira, Hadma Sousa.pdf: 199744 bytes, checksum: 5382777888f6c1325f3f0d5d674bc941 (MD5)Made available in DSpace on 2012-10-08T18:33:43Z (GMT). No. of bitstreams: 1 Ferreira, Hadma Sousa.pdf: 199744 bytes, checksum: 5382777888f6c1325f3f0d5d674bc941 (MD5) Previous issue date: 2009-04São Paulohttp://dx.doi.org/10.1590/S0103-97332009000200003reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAGold catalystsPhotoacoustic spectroscopyCO adsorbedA spectroscopic study of Au/CeXZr1-XO2 catalystsBrazilian Journal of Physicsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleenginfo:eu-repo/semantics/openAccessORIGINALFerreira, Hadma Sousa.pdfFerreira, Hadma Sousa.pdfapplication/pdf199744https://repositorio.ufba.br/bitstream/ri/6895/1/Ferreira%2c%20Hadma%20Sousa.pdf5382777888f6c1325f3f0d5d674bc941MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/6895/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTFerreira, Hadma Sousa.pdf.txtFerreira, Hadma Sousa.pdf.txtExtracted texttext/plain22017https://repositorio.ufba.br/bitstream/ri/6895/3/Ferreira%2c%20Hadma%20Sousa.pdf.txt4995ae4dc2e4763bd364a9db640c6fe1MD53ri/68952022-07-05 14:03:10.638oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:10Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
dc.title.pt_BR.fl_str_mv |
A spectroscopic study of Au/CeXZr1-XO2 catalysts |
dc.title.alternative.pt_BR.fl_str_mv |
Brazilian Journal of Physics |
title |
A spectroscopic study of Au/CeXZr1-XO2 catalysts |
spellingShingle |
A spectroscopic study of Au/CeXZr1-XO2 catalysts Ferreira, Hadma Sousa Gold catalysts Photoacoustic spectroscopy CO adsorbed |
title_short |
A spectroscopic study of Au/CeXZr1-XO2 catalysts |
title_full |
A spectroscopic study of Au/CeXZr1-XO2 catalysts |
title_fullStr |
A spectroscopic study of Au/CeXZr1-XO2 catalysts |
title_full_unstemmed |
A spectroscopic study of Au/CeXZr1-XO2 catalysts |
title_sort |
A spectroscopic study of Au/CeXZr1-XO2 catalysts |
author |
Ferreira, Hadma Sousa |
author_facet |
Ferreira, Hadma Sousa Varela, Maria do Carmo Rangel Santos Ferreira, Márcio Luís Oliveira Pepe, Iuri Muniz Silva, Antônio Ferreira da |
author_role |
author |
author2 |
Varela, Maria do Carmo Rangel Santos Ferreira, Márcio Luís Oliveira Pepe, Iuri Muniz Silva, Antônio Ferreira da |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ferreira, Hadma Sousa Varela, Maria do Carmo Rangel Santos Ferreira, Márcio Luís Oliveira Pepe, Iuri Muniz Silva, Antônio Ferreira da Ferreira, Hadma Sousa Varela, Maria do Carmo Rangel Santos Ferreira, Márcio Luís Oliveira Pepe, Iuri Muniz Silva, Antônio Ferreira da |
dc.subject.por.fl_str_mv |
Gold catalysts Photoacoustic spectroscopy CO adsorbed |
topic |
Gold catalysts Photoacoustic spectroscopy CO adsorbed |
description |
p.141-145 |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009-04 |
dc.date.accessioned.fl_str_mv |
2012-10-08T18:33:43Z |
dc.date.available.fl_str_mv |
2012-10-08T18:33:43Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufba.br/ri/handle/ri/6895 |
dc.identifier.issn.none.fl_str_mv |
0103-9733 |
dc.identifier.number.pt_BR.fl_str_mv |
v. 39, n. 1 |
identifier_str_mv |
0103-9733 v. 39, n. 1 |
url |
http://www.repositorio.ufba.br/ri/handle/ri/6895 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.pt_BR.fl_str_mv |
http://dx.doi.org/10.1590/S0103-97332009000200003 |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFBA instname:Universidade Federal da Bahia (UFBA) instacron:UFBA |
instname_str |
Universidade Federal da Bahia (UFBA) |
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UFBA |
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UFBA |
reponame_str |
Repositório Institucional da UFBA |
collection |
Repositório Institucional da UFBA |
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