The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt
Autor(a) principal: | |
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Data de Publicação: | 2006 |
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=S0103-50532006000400006 |
Resumo: | The influence of the substrate electrochemical pre-treatment in 0.5 mol L-1 H2SO4 on the Pt electrodeposition on boron-doped diamond, BDD, film electrodes was investigated. Platinum cannot be electrodeposited on a freshly prepared BDD electrode; however, potentiodynamic cycling or anodic potential steps at short times does activate the electrode. Anodic pre-treatment plays a dual role in the behavior of Pt deposition on BDD surfaces: Pt deposition is increased at short-term anodic pre-treatments, whereas at longer pre-treatment times Pt deposition was inhibited. These facts are explained in terms of wettability changes and passivation of the surface. Conversely, the oxide layer formed in these treatments increases the dispersion level of the catalyst. |
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Journal of the Brazilian Chemical Society (Online) |
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The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Ptboron-doped diamond electrodesPt electrodepositionelectro oxidationThe influence of the substrate electrochemical pre-treatment in 0.5 mol L-1 H2SO4 on the Pt electrodeposition on boron-doped diamond, BDD, film electrodes was investigated. Platinum cannot be electrodeposited on a freshly prepared BDD electrode; however, potentiodynamic cycling or anodic potential steps at short times does activate the electrode. Anodic pre-treatment plays a dual role in the behavior of Pt deposition on BDD surfaces: Pt deposition is increased at short-term anodic pre-treatments, whereas at longer pre-treatment times Pt deposition was inhibited. These facts are explained in terms of wettability changes and passivation of the surface. Conversely, the oxide layer formed in these treatments increases the dispersion level of the catalyst.Sociedade Brasileira de Química2006-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000400006Journal of the Brazilian Chemical Society v.17 n.4 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000400006info:eu-repo/semantics/openAccessRibeiro,Mauro C.Silva,Leide G. daSumodjo,Paulo T. A.eng2006-08-25T00:00:00Zoai:scielo:S0103-50532006000400006Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-08-25T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt |
title |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt |
spellingShingle |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt Ribeiro,Mauro C. boron-doped diamond electrodes Pt electrodeposition electro oxidation |
title_short |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt |
title_full |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt |
title_fullStr |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt |
title_full_unstemmed |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt |
title_sort |
The influence of electrochemical pre-treatment of B-doped diamond films on the electrodeposition of Pt |
author |
Ribeiro,Mauro C. |
author_facet |
Ribeiro,Mauro C. Silva,Leide G. da Sumodjo,Paulo T. A. |
author_role |
author |
author2 |
Silva,Leide G. da Sumodjo,Paulo T. A. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Ribeiro,Mauro C. Silva,Leide G. da Sumodjo,Paulo T. A. |
dc.subject.por.fl_str_mv |
boron-doped diamond electrodes Pt electrodeposition electro oxidation |
topic |
boron-doped diamond electrodes Pt electrodeposition electro oxidation |
description |
The influence of the substrate electrochemical pre-treatment in 0.5 mol L-1 H2SO4 on the Pt electrodeposition on boron-doped diamond, BDD, film electrodes was investigated. Platinum cannot be electrodeposited on a freshly prepared BDD electrode; however, potentiodynamic cycling or anodic potential steps at short times does activate the electrode. Anodic pre-treatment plays a dual role in the behavior of Pt deposition on BDD surfaces: Pt deposition is increased at short-term anodic pre-treatments, whereas at longer pre-treatment times Pt deposition was inhibited. These facts are explained in terms of wettability changes and passivation of the surface. Conversely, the oxide layer formed in these treatments increases the dispersion level of the catalyst. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-08-01 |
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=S0103-50532006000400006 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000400006 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532006000400006 |
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.17 n.4 2006 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_ |
1750318167045963776 |