Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000400003 |
Resumo: | In this work, different carbon supported Pt-Cu catalysts and Pd modified Pt-Cu catalysts were prepared by chemical reduction of Pt, Cu and Pd precursors with sodium borohydride, and their electrocatalytic activity for the oxygen reduction reaction was studied. X-ray diffraction analysis indicated alloy formation. Transmission electron microscopy (TEM) showed that the metal nanoparticles are well-distributed on the carbon support. Dispersive X-ray absorption spectroscopy (DXAS) was used to achieve a better understanding of the intrinsic properties of the materials. The electrocatalysts were characterized electrochemically by cyclic voltammetry in 0.5 mol L-1 H2SO4 and their electrochemical activity was studied with steady-state experiments in a direct methanol fuel cell (DMFC). The introduction of Pd led to an improvement of the catalytic activity of the Pt-Cu catalysts. The best performance in a DMFC was obtained using, as cathode, a Pt50Pd40Cu10/C alloy catalyst thermally treated at 500 ºC in an H2/Ar atmosphere. |
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Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cellsoxygen reduction reactionelectrocatalysisDMFCcathodesIn this work, different carbon supported Pt-Cu catalysts and Pd modified Pt-Cu catalysts were prepared by chemical reduction of Pt, Cu and Pd precursors with sodium borohydride, and their electrocatalytic activity for the oxygen reduction reaction was studied. X-ray diffraction analysis indicated alloy formation. Transmission electron microscopy (TEM) showed that the metal nanoparticles are well-distributed on the carbon support. Dispersive X-ray absorption spectroscopy (DXAS) was used to achieve a better understanding of the intrinsic properties of the materials. The electrocatalysts were characterized electrochemically by cyclic voltammetry in 0.5 mol L-1 H2SO4 and their electrochemical activity was studied with steady-state experiments in a direct methanol fuel cell (DMFC). The introduction of Pd led to an improvement of the catalytic activity of the Pt-Cu catalysts. The best performance in a DMFC was obtained using, as cathode, a Pt50Pd40Cu10/C alloy catalyst thermally treated at 500 ºC in an H2/Ar atmosphere.Sociedade Brasileira de Química2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000400003Journal of the Brazilian Chemical Society v.21 n.4 2010reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532010000400003info:eu-repo/semantics/openAccessCarbonio,Emilia A.Colmati,FlavioCiapina,Eduardo G.Pereira,Maristela E.Gonzalez,Ernesto R.eng2010-05-21T00:00:00Zoai:scielo:S0103-50532010000400003Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2010-05-21T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells |
title |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells |
spellingShingle |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells Carbonio,Emilia A. oxygen reduction reaction electrocatalysis DMFC cathodes |
title_short |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells |
title_full |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells |
title_fullStr |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells |
title_full_unstemmed |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells |
title_sort |
Pt-Cu/C and Pd Modified Pt-Cu/C electrocatalysts for the oxygen reduction reaction in direct methanol fuel cells |
author |
Carbonio,Emilia A. |
author_facet |
Carbonio,Emilia A. Colmati,Flavio Ciapina,Eduardo G. Pereira,Maristela E. Gonzalez,Ernesto R. |
author_role |
author |
author2 |
Colmati,Flavio Ciapina,Eduardo G. Pereira,Maristela E. Gonzalez,Ernesto R. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Carbonio,Emilia A. Colmati,Flavio Ciapina,Eduardo G. Pereira,Maristela E. Gonzalez,Ernesto R. |
dc.subject.por.fl_str_mv |
oxygen reduction reaction electrocatalysis DMFC cathodes |
topic |
oxygen reduction reaction electrocatalysis DMFC cathodes |
description |
In this work, different carbon supported Pt-Cu catalysts and Pd modified Pt-Cu catalysts were prepared by chemical reduction of Pt, Cu and Pd precursors with sodium borohydride, and their electrocatalytic activity for the oxygen reduction reaction was studied. X-ray diffraction analysis indicated alloy formation. Transmission electron microscopy (TEM) showed that the metal nanoparticles are well-distributed on the carbon support. Dispersive X-ray absorption spectroscopy (DXAS) was used to achieve a better understanding of the intrinsic properties of the materials. The electrocatalysts were characterized electrochemically by cyclic voltammetry in 0.5 mol L-1 H2SO4 and their electrochemical activity was studied with steady-state experiments in a direct methanol fuel cell (DMFC). The introduction of Pd led to an improvement of the catalytic activity of the Pt-Cu catalysts. The best performance in a DMFC was obtained using, as cathode, a Pt50Pd40Cu10/C alloy catalyst thermally treated at 500 ºC in an H2/Ar atmosphere. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000400003 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532010000400003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532010000400003 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.21 n.4 2010 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318170685571072 |