PtSnIr/C anode electrocatalysts: promoting effect in direct ethanol fuel cells
Autor(a) principal: | |
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Data de Publicação: | 2012 |
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=S0103-50532012000600021 |
Resumo: | 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, PtOH2, PtO2, SnO2 and IrO2 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. |
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PtSnIr/C anode electrocatalysts: promoting effect in direct ethanol fuel cellsPtSnIrethanol oxidation reactionelectrocatalysisnanostructured materialsfuel cellsThis 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, PtOH2, PtO2, SnO2 and IrO2 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.Sociedade Brasileira de Química2012-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000600021Journal of the Brazilian Chemical Society v.23 n.6 2012reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532012000600021info:eu-repo/semantics/openAccessSilva,Júlio C. M.Souza,Rodrigo F. B. DeRomano,Mayara A.D'Villa-Silva,MelinaCalegaro,Marcelo L.Hammer,PeterO. Neto,AlmirSantos,Mauro C.eng2012-07-13T00:00:00Zoai:scielo:S0103-50532012000600021Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2012-07-13T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)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. PtSnIr ethanol oxidation reaction electrocatalysis nanostructured materials fuel cells |
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. Souza,Rodrigo F. B. De Romano,Mayara A. D'Villa-Silva,Melina Calegaro,Marcelo L. Hammer,Peter O. Neto,Almir Santos,Mauro C. |
author_role |
author |
author2 |
Souza,Rodrigo F. B. De Romano,Mayara A. D'Villa-Silva,Melina Calegaro,Marcelo L. Hammer,Peter O. Neto,Almir Santos,Mauro C. |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Silva,Júlio C. M. Souza,Rodrigo F. B. De Romano,Mayara A. D'Villa-Silva,Melina Calegaro,Marcelo L. Hammer,Peter O. Neto,Almir Santos,Mauro C. |
dc.subject.por.fl_str_mv |
PtSnIr ethanol oxidation reaction electrocatalysis nanostructured materials fuel cells |
topic |
PtSnIr ethanol oxidation reaction electrocatalysis nanostructured materials fuel cells |
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, PtOH2, PtO2, SnO2 and IrO2 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. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-06-01 |
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=S0103-50532012000600021 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000600021 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532012000600021 |
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.23 n.6 2012 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_ |
1750318173520920576 |