Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1149/06917.0057ecst http://hdl.handle.net/11449/232467 |
Resumo: | This paper presents the results of a bimetallic Pt3Nb/C catalyst prepared by thermal treatment in dilute reductive atmosphere (5% H2 in Ar) to obtain a CO-tolerant catalyst. The thermal treatment leads to the formation of a PtNb fcc solid solution and a Pt3Nb intermetallic phase along with some niobium oxides (NbO2 and NbO1.46). Such crystalline phases modify the electronic environment of platinum, reducing the white line of the Pt L3 absorption edge, as a result of the filling of the Pt 5d band. This, in turn, weakens the Pt-CO adsorption strength, which, in combination with the large availability of oxygenated species coming from the Nb oxides, leads to a very active CO-tolerant anode electrocatalyst, as confirmed by the CO stripping characteristics and the fuel cell performances in the absence and presence of CO in the H2 fuel stream. |
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Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogenThis paper presents the results of a bimetallic Pt3Nb/C catalyst prepared by thermal treatment in dilute reductive atmosphere (5% H2 in Ar) to obtain a CO-tolerant catalyst. The thermal treatment leads to the formation of a PtNb fcc solid solution and a Pt3Nb intermetallic phase along with some niobium oxides (NbO2 and NbO1.46). Such crystalline phases modify the electronic environment of platinum, reducing the white line of the Pt L3 absorption edge, as a result of the filling of the Pt 5d band. This, in turn, weakens the Pt-CO adsorption strength, which, in combination with the large availability of oxygenated species coming from the Nb oxides, leads to a very active CO-tolerant anode electrocatalyst, as confirmed by the CO stripping characteristics and the fuel cell performances in the absence and presence of CO in the H2 fuel stream.Instituto de Química de São Carlos Universidade de São CarlosInstituto de Química Universidade Federal de GoiásUniversidade Estadual Paulista Julio de Mesquita FilhoInstituto de Química Universidade de BrasíliaUniversidade Estadual Paulista Julio de Mesquita FilhoUniversidade de São CarlosUniversidade Federal de Goiás (UFG)Universidade Estadual Paulista (UNESP)Universidade de Brasília (UnB)Rocha, Thairo A.Colmati, FlavioCiapina, Eduardo Gonçalves [UNESP]Linares, José J.Gonzalez, Ernesto Rafael2022-04-29T16:52:05Z2022-04-29T16:52:05Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject57-66http://dx.doi.org/10.1149/06917.0057ecstECS Transactions, v. 69, n. 17, p. 57-66, 2015.1938-58621938-6737http://hdl.handle.net/11449/23246710.1149/06917.0057ecst2-s2.0-84946045353Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengECS Transactionsinfo:eu-repo/semantics/openAccess2024-07-01T20:53:06Zoai:repositorio.unesp.br:11449/232467Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:24:56.656044Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen |
title |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen |
spellingShingle |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen Rocha, Thairo A. |
title_short |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen |
title_full |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen |
title_fullStr |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen |
title_full_unstemmed |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen |
title_sort |
Development of platinum-niobium as a CO tolerant catalyst for PEFC operating with CO contaminated hydrogen |
author |
Rocha, Thairo A. |
author_facet |
Rocha, Thairo A. Colmati, Flavio Ciapina, Eduardo Gonçalves [UNESP] Linares, José J. Gonzalez, Ernesto Rafael |
author_role |
author |
author2 |
Colmati, Flavio Ciapina, Eduardo Gonçalves [UNESP] Linares, José J. Gonzalez, Ernesto Rafael |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Carlos Universidade Federal de Goiás (UFG) Universidade Estadual Paulista (UNESP) Universidade de Brasília (UnB) |
dc.contributor.author.fl_str_mv |
Rocha, Thairo A. Colmati, Flavio Ciapina, Eduardo Gonçalves [UNESP] Linares, José J. Gonzalez, Ernesto Rafael |
description |
This paper presents the results of a bimetallic Pt3Nb/C catalyst prepared by thermal treatment in dilute reductive atmosphere (5% H2 in Ar) to obtain a CO-tolerant catalyst. The thermal treatment leads to the formation of a PtNb fcc solid solution and a Pt3Nb intermetallic phase along with some niobium oxides (NbO2 and NbO1.46). Such crystalline phases modify the electronic environment of platinum, reducing the white line of the Pt L3 absorption edge, as a result of the filling of the Pt 5d band. This, in turn, weakens the Pt-CO adsorption strength, which, in combination with the large availability of oxygenated species coming from the Nb oxides, leads to a very active CO-tolerant anode electrocatalyst, as confirmed by the CO stripping characteristics and the fuel cell performances in the absence and presence of CO in the H2 fuel stream. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2022-04-29T16:52:05Z 2022-04-29T16:52:05Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1149/06917.0057ecst ECS Transactions, v. 69, n. 17, p. 57-66, 2015. 1938-5862 1938-6737 http://hdl.handle.net/11449/232467 10.1149/06917.0057ecst 2-s2.0-84946045353 |
url |
http://dx.doi.org/10.1149/06917.0057ecst http://hdl.handle.net/11449/232467 |
identifier_str_mv |
ECS Transactions, v. 69, n. 17, p. 57-66, 2015. 1938-5862 1938-6737 10.1149/06917.0057ecst 2-s2.0-84946045353 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ECS Transactions |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
57-66 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129317531549696 |