Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction

Detalhes bibliográficos
Autor(a) principal: Yang, Tao
Data de Publicação: 2018
Outros Autores: Pukazhselvan, D., da Silva, E.L., Santos, Mario C., Meng, Lijian, Ramasamy, Devaraj, Jothi, Sathiskumar, Graça, Vanessa, Shi, Shikao
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.22/12347
Resumo: A facile hydrothermal route has been developed to synthesize the highly branched Pt58Cu42 nanoparticles via mixing the H2PtCl6 and CuCl2 with octadecylamine. The Pt58Cu42 after post treatment forms a dandelion flower 3-D structure. A combination of both the branched shape and PtCu composition effects in the Pt58Cu42-nanoparticles shows superior electrocatalytic activity and durability to commercial Pt black for oxygen reduction reaction. The mechanism for the de-alloying and reconstructing of the Pt58Cu42-nanoparticles in electrochemical activity and durability tests has been proposed. It is found that after the durability process, the Pt58Cu42 precursor alloy changes into a substantially Pt enriched PtCu alloy (Pt79Cu21) with a Pt skin. The Pt skin effectively prevents the further dissolution of the Cu below the near-surface to enhance its durability. What's more, the Pt skin exposed to (111) planes which have the lowest surface energy among the low-index planes further promotes the improvement of durability of the PtCu catalyst.
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spelling Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reactionPt-CuAlloyORRDandelion nanostructurePEMFCA facile hydrothermal route has been developed to synthesize the highly branched Pt58Cu42 nanoparticles via mixing the H2PtCl6 and CuCl2 with octadecylamine. The Pt58Cu42 after post treatment forms a dandelion flower 3-D structure. A combination of both the branched shape and PtCu composition effects in the Pt58Cu42-nanoparticles shows superior electrocatalytic activity and durability to commercial Pt black for oxygen reduction reaction. The mechanism for the de-alloying and reconstructing of the Pt58Cu42-nanoparticles in electrochemical activity and durability tests has been proposed. It is found that after the durability process, the Pt58Cu42 precursor alloy changes into a substantially Pt enriched PtCu alloy (Pt79Cu21) with a Pt skin. The Pt skin effectively prevents the further dissolution of the Cu below the near-surface to enhance its durability. What's more, the Pt skin exposed to (111) planes which have the lowest surface energy among the low-index planes further promotes the improvement of durability of the PtCu catalyst.Repositório Científico do Instituto Politécnico do PortoYang, TaoPukazhselvan, D.da Silva, E.L.Santos, Mario C.Meng, LijianRamasamy, DevarajJothi, SathiskumarGraça, VanessaShi, Shikao2018-112119-01-01T00:00:00Z2018-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.22/12347eng10.1016/j.ijhydene.2018.11.044metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-13T12:54:19Zoai:recipp.ipp.pt:10400.22/12347Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:32:41.100716Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
title Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
spellingShingle Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
Yang, Tao
Pt-Cu
Alloy
ORR
Dandelion nanostructure
PEMFC
title_short Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
title_full Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
title_fullStr Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
title_full_unstemmed Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
title_sort Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction
author Yang, Tao
author_facet Yang, Tao
Pukazhselvan, D.
da Silva, E.L.
Santos, Mario C.
Meng, Lijian
Ramasamy, Devaraj
Jothi, Sathiskumar
Graça, Vanessa
Shi, Shikao
author_role author
author2 Pukazhselvan, D.
da Silva, E.L.
Santos, Mario C.
Meng, Lijian
Ramasamy, Devaraj
Jothi, Sathiskumar
Graça, Vanessa
Shi, Shikao
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico do Porto
dc.contributor.author.fl_str_mv Yang, Tao
Pukazhselvan, D.
da Silva, E.L.
Santos, Mario C.
Meng, Lijian
Ramasamy, Devaraj
Jothi, Sathiskumar
Graça, Vanessa
Shi, Shikao
dc.subject.por.fl_str_mv Pt-Cu
Alloy
ORR
Dandelion nanostructure
PEMFC
topic Pt-Cu
Alloy
ORR
Dandelion nanostructure
PEMFC
description A facile hydrothermal route has been developed to synthesize the highly branched Pt58Cu42 nanoparticles via mixing the H2PtCl6 and CuCl2 with octadecylamine. The Pt58Cu42 after post treatment forms a dandelion flower 3-D structure. A combination of both the branched shape and PtCu composition effects in the Pt58Cu42-nanoparticles shows superior electrocatalytic activity and durability to commercial Pt black for oxygen reduction reaction. The mechanism for the de-alloying and reconstructing of the Pt58Cu42-nanoparticles in electrochemical activity and durability tests has been proposed. It is found that after the durability process, the Pt58Cu42 precursor alloy changes into a substantially Pt enriched PtCu alloy (Pt79Cu21) with a Pt skin. The Pt skin effectively prevents the further dissolution of the Cu below the near-surface to enhance its durability. What's more, the Pt skin exposed to (111) planes which have the lowest surface energy among the low-index planes further promotes the improvement of durability of the PtCu catalyst.
publishDate 2018
dc.date.none.fl_str_mv 2018-11
2018-11-01T00:00:00Z
2119-01-01T00:00:00Z
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://hdl.handle.net/10400.22/12347
url http://hdl.handle.net/10400.22/12347
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1016/j.ijhydene.2018.11.044
dc.rights.driver.fl_str_mv metadata only access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv metadata only access
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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