Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes
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Publication Date: | 2016 |
Other Authors: | |
Format: | Article |
Language: | eng |
Source: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Download full: | http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042016000200001 |
Summary: | Silver chloride modified carbon paste electrode was prepared as a new electrode and used to electrocatalytic oxidation of ethanol. For the first time, the catalytic oxidation of ethanol was demonstrated by cyclic voltammetry, chronoamperometry and amperometry methods at the surface of this modified carbon paste electrode. Compared to silver chloride modified carbon paste electrode, silver bromide modified carbon paste electrode and bare silver electrode catalysts, silver chloride modified carbon paste electrode exhibited markedly superior catalytic activity for the electrocatalytic oxidation of ethanol. It can be seen that the electrocatalytic efficiency of silver chloride modified carbon paste electrode is higher than the silver bromide modified carbon paste and bare silver electrodes. The catalytic oxidation peak current was linearly dependent on the ethanol concentration. The j0 for silver chloride modified carbon paste and silver bromide modified carbon paste electrodes are 11.2 and 5.4 folds respectively higher than that of the bare silver electrode. For silver chloride modified carbon paste electrode, the charge transfer coefficient (α), the number of electrons involved in the rate determining step (nα) and exchange current density (j0) were calculated as 0.46, 1 and 5.05×10-7 respectively. The modified electrode possesses high selectivity, good reproducibility and well stability. |
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Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodesethanolmodified carbon paste electrodeelectrocatalytic oxidationsilver chloridecyclic voltammetrySilver chloride modified carbon paste electrode was prepared as a new electrode and used to electrocatalytic oxidation of ethanol. For the first time, the catalytic oxidation of ethanol was demonstrated by cyclic voltammetry, chronoamperometry and amperometry methods at the surface of this modified carbon paste electrode. Compared to silver chloride modified carbon paste electrode, silver bromide modified carbon paste electrode and bare silver electrode catalysts, silver chloride modified carbon paste electrode exhibited markedly superior catalytic activity for the electrocatalytic oxidation of ethanol. It can be seen that the electrocatalytic efficiency of silver chloride modified carbon paste electrode is higher than the silver bromide modified carbon paste and bare silver electrodes. The catalytic oxidation peak current was linearly dependent on the ethanol concentration. The j0 for silver chloride modified carbon paste and silver bromide modified carbon paste electrodes are 11.2 and 5.4 folds respectively higher than that of the bare silver electrode. For silver chloride modified carbon paste electrode, the charge transfer coefficient (α), the number of electrons involved in the rate determining step (nα) and exchange current density (j0) were calculated as 0.46, 1 and 5.05×10-7 respectively. The modified electrode possesses high selectivity, good reproducibility and well stability.Sociedade Portuguesa de Electroquímica2016-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042016000200001Portugaliae Electrochimica Acta v.34 n.2 2016reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042016000200001Karim-Nezhad,GhasemPashazadeh,Sarainfo:eu-repo/semantics/openAccess2024-02-06T17:07:21Zoai:scielo:S0872-19042016000200001Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:20:18.064427Repositório 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 |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes |
title |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes |
spellingShingle |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes Karim-Nezhad,Ghasem ethanol modified carbon paste electrode electrocatalytic oxidation silver chloride cyclic voltammetry |
title_short |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes |
title_full |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes |
title_fullStr |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes |
title_full_unstemmed |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes |
title_sort |
Electrocatalytic oxidation of ethanol at silver chloride/ bromide modified carbon paste electrodes |
author |
Karim-Nezhad,Ghasem |
author_facet |
Karim-Nezhad,Ghasem Pashazadeh,Sara |
author_role |
author |
author2 |
Pashazadeh,Sara |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Karim-Nezhad,Ghasem Pashazadeh,Sara |
dc.subject.por.fl_str_mv |
ethanol modified carbon paste electrode electrocatalytic oxidation silver chloride cyclic voltammetry |
topic |
ethanol modified carbon paste electrode electrocatalytic oxidation silver chloride cyclic voltammetry |
description |
Silver chloride modified carbon paste electrode was prepared as a new electrode and used to electrocatalytic oxidation of ethanol. For the first time, the catalytic oxidation of ethanol was demonstrated by cyclic voltammetry, chronoamperometry and amperometry methods at the surface of this modified carbon paste electrode. Compared to silver chloride modified carbon paste electrode, silver bromide modified carbon paste electrode and bare silver electrode catalysts, silver chloride modified carbon paste electrode exhibited markedly superior catalytic activity for the electrocatalytic oxidation of ethanol. It can be seen that the electrocatalytic efficiency of silver chloride modified carbon paste electrode is higher than the silver bromide modified carbon paste and bare silver electrodes. The catalytic oxidation peak current was linearly dependent on the ethanol concentration. The j0 for silver chloride modified carbon paste and silver bromide modified carbon paste electrodes are 11.2 and 5.4 folds respectively higher than that of the bare silver electrode. For silver chloride modified carbon paste electrode, the charge transfer coefficient (α), the number of electrons involved in the rate determining step (nα) and exchange current density (j0) were calculated as 0.46, 1 and 5.05×10-7 respectively. The modified electrode possesses high selectivity, good reproducibility and well stability. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-03-01 |
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://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042016000200001 |
url |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042016000200001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042016000200001 |
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 Portuguesa de Electroquímica |
publisher.none.fl_str_mv |
Sociedade Portuguesa de Electroquímica |
dc.source.none.fl_str_mv |
Portugaliae Electrochimica Acta v.34 n.2 2016 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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1799137291464081408 |