PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells
Main Author: | |
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Publication Date: | 2012 |
Other Authors: | , , , , , , |
Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UNESP |
Download full: | http://dx.doi.org/10.1590/S0103-50532012000600021 http://hdl.handle.net/11449/73433 |
Summary: | This study investigates the promoting effect of PtSnIr/C (1:1:1) electrocatalyst anode, prepared by polymeric precursor method, on the ethanol oxidation reaction in a direct ethanol fuel cell (DEFC). All of the materials used were 20% metal m/m on carbon. X-ray photoelectron spectroscopy (XPS) analysis showed the presence of Pt, PtOH 2, PtO 2, SnO 2 and IrO 2 at the electrocatalyst surface, indicating a possible decorated particle structure. X-ray diffractometry (XRD) analysis indicated metallic Pt and Ir as well as the formation of an alloy with Sn. Using the PtSnIr/C electrocatalyst prepared here with two times lower loading of Pt than PtSn/C E-tek electrocatalyst, it was possible to obtain the same maximum power density found for the commercial material. The main reaction product was acetic acid probably due to the presence of oxides, in this point the bifunctional mechanism is predominant, but an electronic effect should not be discarded. © 2012 Sociedade Brasileira de Química. |
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PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cellsElectrocatalysisEthanol oxidation reactionFuel cellsNanostructured materialsPtSnIrThis study investigates the promoting effect of PtSnIr/C (1:1:1) electrocatalyst anode, prepared by polymeric precursor method, on the ethanol oxidation reaction in a direct ethanol fuel cell (DEFC). All of the materials used were 20% metal m/m on carbon. X-ray photoelectron spectroscopy (XPS) analysis showed the presence of Pt, PtOH 2, PtO 2, SnO 2 and IrO 2 at the electrocatalyst surface, indicating a possible decorated particle structure. X-ray diffractometry (XRD) analysis indicated metallic Pt and Ir as well as the formation of an alloy with Sn. Using the PtSnIr/C electrocatalyst prepared here with two times lower loading of Pt than PtSn/C E-tek electrocatalyst, it was possible to obtain the same maximum power density found for the commercial material. The main reaction product was acetic acid probably due to the presence of oxides, in this point the bifunctional mechanism is predominant, but an electronic effect should not be discarded. © 2012 Sociedade Brasileira de Química.Laboratório de Eletroquímica e Materiais Nanoestruturados Centro de Ciências Naturais e Humanas Universidade Federal do ABC, Rua Santa Adélia, 166, 09210-170 Santo André-SPGrupo de Materiais Eletroquímicos e Métodos Eletroanalíticos Instituto de Química de São Carlos Universidade de São Paulo, CP 780, 13566-590 São Carlos-SPInstituto de Química Universidade Estadual de São Paulo, 14800-060 Araraquara-SPInstituto de Pesquisas Energeticas e Nucleares-Comissao Nacional de Energia Nuclear (IPEN) CNEN, Av. Prof. Lineu Prestes, 2242, 05508-900 São Paulo-SPInstituto de Química Universidade Estadual de São Paulo, 14800-060 Araraquara-SPUniversidade Federal do ABC (UFABC)Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)CNENSilva, Júlio C. M.De Souza, Rodrigo F. B.Romano, Mayara A.D'villa-Silva, MelinaCalegaro, Marcelo L.Hammer, Peter [UNESP]Neto, Almir O.Santos, Mauro C.2014-05-27T11:26:52Z2014-05-27T11:26:52Z2012-07-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1146-1153application/pdfhttp://dx.doi.org/10.1590/S0103-50532012000600021Journal of the Brazilian Chemical Society, v. 23, n. 6, p. 1146-1153, 2012.0103-50531678-4790http://hdl.handle.net/11449/7343310.1590/S0103-50532012000600021S0103-505320120006000212-s2.0-848635846632-s2.0-84863584663.pdf64668410235061310000-0002-3823-00500000-0002-3823-0050Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,3570,357info:eu-repo/semantics/openAccess2024-01-27T07:01:10Zoai:repositorio.unesp.br:11449/73433Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-27T07:01:10Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells |
title |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells |
spellingShingle |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells Silva, Júlio C. M. Electrocatalysis Ethanol oxidation reaction Fuel cells Nanostructured materials PtSnIr |
title_short |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells |
title_full |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells |
title_fullStr |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells |
title_full_unstemmed |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells |
title_sort |
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells |
author |
Silva, Júlio C. M. |
author_facet |
Silva, Júlio C. M. De Souza, Rodrigo F. B. Romano, Mayara A. D'villa-Silva, Melina Calegaro, Marcelo L. Hammer, Peter [UNESP] Neto, Almir O. Santos, Mauro C. |
author_role |
author |
author2 |
De Souza, Rodrigo F. B. Romano, Mayara A. D'villa-Silva, Melina Calegaro, Marcelo L. Hammer, Peter [UNESP] Neto, Almir O. Santos, Mauro C. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do ABC (UFABC) Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) CNEN |
dc.contributor.author.fl_str_mv |
Silva, Júlio C. M. De Souza, Rodrigo F. B. Romano, Mayara A. D'villa-Silva, Melina Calegaro, Marcelo L. Hammer, Peter [UNESP] Neto, Almir O. Santos, Mauro C. |
dc.subject.por.fl_str_mv |
Electrocatalysis Ethanol oxidation reaction Fuel cells Nanostructured materials PtSnIr |
topic |
Electrocatalysis Ethanol oxidation reaction Fuel cells Nanostructured materials PtSnIr |
description |
This study investigates the promoting effect of PtSnIr/C (1:1:1) electrocatalyst anode, prepared by polymeric precursor method, on the ethanol oxidation reaction in a direct ethanol fuel cell (DEFC). All of the materials used were 20% metal m/m on carbon. X-ray photoelectron spectroscopy (XPS) analysis showed the presence of Pt, PtOH 2, PtO 2, SnO 2 and IrO 2 at the electrocatalyst surface, indicating a possible decorated particle structure. X-ray diffractometry (XRD) analysis indicated metallic Pt and Ir as well as the formation of an alloy with Sn. Using the PtSnIr/C electrocatalyst prepared here with two times lower loading of Pt than PtSn/C E-tek electrocatalyst, it was possible to obtain the same maximum power density found for the commercial material. The main reaction product was acetic acid probably due to the presence of oxides, in this point the bifunctional mechanism is predominant, but an electronic effect should not be discarded. © 2012 Sociedade Brasileira de Química. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-07-12 2014-05-27T11:26:52Z 2014-05-27T11:26:52Z |
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://dx.doi.org/10.1590/S0103-50532012000600021 Journal of the Brazilian Chemical Society, v. 23, n. 6, p. 1146-1153, 2012. 0103-5053 1678-4790 http://hdl.handle.net/11449/73433 10.1590/S0103-50532012000600021 S0103-50532012000600021 2-s2.0-84863584663 2-s2.0-84863584663.pdf 6466841023506131 0000-0002-3823-0050 0000-0002-3823-0050 |
url |
http://dx.doi.org/10.1590/S0103-50532012000600021 http://hdl.handle.net/11449/73433 |
identifier_str_mv |
Journal of the Brazilian Chemical Society, v. 23, n. 6, p. 1146-1153, 2012. 0103-5053 1678-4790 10.1590/S0103-50532012000600021 S0103-50532012000600021 2-s2.0-84863584663 2-s2.0-84863584663.pdf 6466841023506131 0000-0002-3823-0050 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Brazilian Chemical Society 1.444 0,357 0,357 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1146-1153 application/pdf |
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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1797790415410167808 |