Methanol Oxidation in Alkaline Medium Using PtIn/C Electrocatalysts
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
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. |
id |
UNSP_b6d8441cd09248547e789bc5de5f799c |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/162107 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
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 |