Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts

Detalhes bibliográficos
Autor(a) principal: Santos, M. C. L.
Data de Publicação: 2016
Outros Autores: Ottoni, C. A. [UNESP], Souza, R. F. B. de, Silva, S. G. da, Assumpcao, M. H. M. T., Spinace, E. V., Neto, A. O.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s12678-016-0324-z
http://hdl.handle.net/11449/162107
Resumo: Pt/C and PtIn/C with atomic ratios of 90:10, 70:30, and 50:50 were investigated for methanol electro-oxidation in alkaline media by using cyclic voltammetry (CV), chronoamperometry (CA), and direct methanol alkaline fuel cell (DMAFC). All electrocatalysts were synthesized using sodium borohydride method with 20 wt% of metals loading on carbon. X-ray diffraction (XRD) analysis revealed that bimetallic PtIn had faced centered cubic structure and, also, confirmed alloy formation for PtIn/C nanoparticles. Transmission electron micrographs showed metal nanoparticles with average particle size between 3.0 and 5.0 nm; however, the particle size increases when the In content was increased in PtIn/C. In the CV experiments, the onset potential of methanol electro-oxidation shifted to lower values as the indium content increased. Chronoamperometry experiments and direct methanol alkaline fuel cell suggested PtIn/C (70:30) as the most promising material for methanol electro-oxidation: this result could be explained by the presence of Pt and In in close contact (electronic effect) as the occurrence of oxy-hydroxy interactions.
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spelling Methanol Oxidation in Alkaline Medium Using PtIn/C ElectrocatalystsMethanol oxidationPtIn electrocatalystsAlkaline fuel cellPt/C and PtIn/C with atomic ratios of 90:10, 70:30, and 50:50 were investigated for methanol electro-oxidation in alkaline media by using cyclic voltammetry (CV), chronoamperometry (CA), and direct methanol alkaline fuel cell (DMAFC). All electrocatalysts were synthesized using sodium borohydride method with 20 wt% of metals loading on carbon. X-ray diffraction (XRD) analysis revealed that bimetallic PtIn had faced centered cubic structure and, also, confirmed alloy formation for PtIn/C nanoparticles. Transmission electron micrographs showed metal nanoparticles with average particle size between 3.0 and 5.0 nm; however, the particle size increases when the In content was increased in PtIn/C. In the CV experiments, the onset potential of methanol electro-oxidation shifted to lower values as the indium content increased. Chronoamperometry experiments and direct methanol alkaline fuel cell suggested PtIn/C (70:30) as the most promising material for methanol electro-oxidation: this result could be explained by the presence of Pt and In in close contact (electronic effect) as the occurrence of oxy-hydroxy interactions.Laboratorio de Microscopia do Centro de Ciencias e Tecnologia de Materiais (CCTM)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)IPEN CNEN SP, Inst Pesquisas Energet & Nucl, Ave Prof Lineu Prestes 2252 Cidade Univ, BR-05508900 Sao Paulo, SP, BrazilSao Paulo State Univ, Biosci Inst, BR-11380972 Sao Vicente, SP, BrazilUniv Fed Amazonas, Dept Chem, BR-69077000 Manaus, Amazonas, BrazilUniv Fed Sao Carlos, Ctr Ciencias Nat, UFSCar Campus Lagoa Sino, BR-18290000 Buri, SP, BrazilSao Paulo State Univ, Biosci Inst, BR-11380972 Sao Vicente, SP, BrazilFAPESP: 2014/09087-4SpringerIPEN CNEN SPUniversidade Estadual Paulista (Unesp)Univ Fed AmazonasUniversidade Federal de São Carlos (UFSCar)Santos, M. C. L.Ottoni, C. A. [UNESP]Souza, R. F. B. deSilva, S. G. daAssumpcao, M. H. M. T.Spinace, E. V.Neto, A. O.2018-11-26T17:10:22Z2018-11-26T17:10:22Z2016-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article445-450application/pdfhttp://dx.doi.org/10.1007/s12678-016-0324-zElectrocatalysis. New York: Springer, v. 7, n. 6, p. 445-450, 2016.1868-2529http://hdl.handle.net/11449/16210710.1007/s12678-016-0324-zWOS:000386490500002WOS000386490500002.pdf96201224557082230000-0003-4069-509XWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengElectrocatalysis0,994info:eu-repo/semantics/openAccess2023-10-19T06:11:15Zoai:repositorio.unesp.br:11449/162107Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:23:15.209824Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
title Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
spellingShingle Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
Santos, M. C. L.
Methanol oxidation
PtIn electrocatalysts
Alkaline fuel cell
title_short Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
title_full Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
title_fullStr Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
title_full_unstemmed Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
title_sort Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
author Santos, M. C. L.
author_facet Santos, M. C. L.
Ottoni, C. A. [UNESP]
Souza, R. F. B. de
Silva, S. G. da
Assumpcao, M. H. M. T.
Spinace, E. V.
Neto, A. O.
author_role author
author2 Ottoni, C. A. [UNESP]
Souza, R. F. B. de
Silva, S. G. da
Assumpcao, M. H. M. T.
Spinace, E. V.
Neto, A. O.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv IPEN CNEN SP
Universidade Estadual Paulista (Unesp)
Univ Fed Amazonas
Universidade Federal de São Carlos (UFSCar)
dc.contributor.author.fl_str_mv Santos, M. C. L.
Ottoni, C. A. [UNESP]
Souza, R. F. B. de
Silva, S. G. da
Assumpcao, M. H. M. T.
Spinace, E. V.
Neto, A. O.
dc.subject.por.fl_str_mv Methanol oxidation
PtIn electrocatalysts
Alkaline fuel cell
topic Methanol oxidation
PtIn electrocatalysts
Alkaline fuel cell
description Pt/C and PtIn/C with atomic ratios of 90:10, 70:30, and 50:50 were investigated for methanol electro-oxidation in alkaline media by using cyclic voltammetry (CV), chronoamperometry (CA), and direct methanol alkaline fuel cell (DMAFC). All electrocatalysts were synthesized using sodium borohydride method with 20 wt% of metals loading on carbon. X-ray diffraction (XRD) analysis revealed that bimetallic PtIn had faced centered cubic structure and, also, confirmed alloy formation for PtIn/C nanoparticles. Transmission electron micrographs showed metal nanoparticles with average particle size between 3.0 and 5.0 nm; however, the particle size increases when the In content was increased in PtIn/C. In the CV experiments, the onset potential of methanol electro-oxidation shifted to lower values as the indium content increased. Chronoamperometry experiments and direct methanol alkaline fuel cell suggested PtIn/C (70:30) as the most promising material for methanol electro-oxidation: this result could be explained by the presence of Pt and In in close contact (electronic effect) as the occurrence of oxy-hydroxy interactions.
publishDate 2016
dc.date.none.fl_str_mv 2016-11-01
2018-11-26T17:10:22Z
2018-11-26T17:10:22Z
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/10.1007/s12678-016-0324-z
Electrocatalysis. New York: Springer, v. 7, n. 6, p. 445-450, 2016.
1868-2529
http://hdl.handle.net/11449/162107
10.1007/s12678-016-0324-z
WOS:000386490500002
WOS000386490500002.pdf
9620122455708223
0000-0003-4069-509X
url http://dx.doi.org/10.1007/s12678-016-0324-z
http://hdl.handle.net/11449/162107
identifier_str_mv Electrocatalysis. New York: Springer, v. 7, n. 6, p. 445-450, 2016.
1868-2529
10.1007/s12678-016-0324-z
WOS:000386490500002
WOS000386490500002.pdf
9620122455708223
0000-0003-4069-509X
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Electrocatalysis
0,994
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 445-450
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Web of Science
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
_version_ 1808128506386710528