Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , |
Tipo de documento: | Relatório |
Idioma: | eng |
Título da fonte: | Eclética Química |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702003000200004 |
Resumo: | Some aspects of the application of electrochemical impedance spectroscopy to studies of solid electrode / solution interface, in the absence of faradaic processes, are analysed. In order to perform this analysis, gold electrodes with (111) and (210) crystallographic orientations in an aqueous solution containing 10 mmol dm-3 KF, as supporting electrolyte, and a pyridine concentration varying from 0.01 to 4.6 mmol dm-3, were used. The experimental data was analysed by using EQUIVCRT software, which utilises non-linear least squares routines, attributing to the solid electrode / solution interface behaviour described by an equivalent circuit with a resistance in series with a constant phase element. The results of this fitting procedure were analysed by the dependence on the electrode potential on two parameters: the pre-exponential factor, Y0, and the exponent n f, related with the phase angle shift. By this analysis it was possible to observe that the pyridine adsorption is strongly affected by the crystallographic orientation of the electrode surface and that the extent of deviation from ideal capacitive behaviour is mainly of interfacial origin. |
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Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedurePyridineGoldElectrochemical Immittance SpectroscopyFrequency DispersionDouble Layer CapacitanceSome aspects of the application of electrochemical impedance spectroscopy to studies of solid electrode / solution interface, in the absence of faradaic processes, are analysed. In order to perform this analysis, gold electrodes with (111) and (210) crystallographic orientations in an aqueous solution containing 10 mmol dm-3 KF, as supporting electrolyte, and a pyridine concentration varying from 0.01 to 4.6 mmol dm-3, were used. The experimental data was analysed by using EQUIVCRT software, which utilises non-linear least squares routines, attributing to the solid electrode / solution interface behaviour described by an equivalent circuit with a resistance in series with a constant phase element. The results of this fitting procedure were analysed by the dependence on the electrode potential on two parameters: the pre-exponential factor, Y0, and the exponent n f, related with the phase angle shift. By this analysis it was possible to observe that the pyridine adsorption is strongly affected by the crystallographic orientation of the electrode surface and that the extent of deviation from ideal capacitive behaviour is mainly of interfacial origin.Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP2003-01-01info:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702003000200004Eclética Química v.28 n.2 2003reponame:Eclética Químicainstname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)instacron:UNESP10.1590/S0100-46702003000200004info:eu-repo/semantics/openAccessMotheo,A. de J.Saldanha,R. M. P.Neves,R. de S.Robertis,E. deSadkowski,A.eng2004-04-02T00:00:00Zoai:scielo:S0100-46702003000200004Revistahttp://revista.iq.unesp.br/ojs/index.php/ecletica/PUBhttps://revista.iq.unesp.br/ojs/index.php/ecletica/oaiecletica@ctrlk.com.br||ecletica@iq.unesp.br1678-46181678-4618opendoar:2004-04-02T00:00Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)false |
dc.title.none.fl_str_mv |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure |
title |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure |
spellingShingle |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure Motheo,A. de J. Pyridine Gold Electrochemical Immittance Spectroscopy Frequency Dispersion Double Layer Capacitance |
title_short |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure |
title_full |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure |
title_fullStr |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure |
title_full_unstemmed |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure |
title_sort |
Characteristics of pyridine adsorption on Au(111) and Au(210) by EIS parameters fitting procedure |
author |
Motheo,A. de J. |
author_facet |
Motheo,A. de J. Saldanha,R. M. P. Neves,R. de S. Robertis,E. de Sadkowski,A. |
author_role |
author |
author2 |
Saldanha,R. M. P. Neves,R. de S. Robertis,E. de Sadkowski,A. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Motheo,A. de J. Saldanha,R. M. P. Neves,R. de S. Robertis,E. de Sadkowski,A. |
dc.subject.por.fl_str_mv |
Pyridine Gold Electrochemical Immittance Spectroscopy Frequency Dispersion Double Layer Capacitance |
topic |
Pyridine Gold Electrochemical Immittance Spectroscopy Frequency Dispersion Double Layer Capacitance |
description |
Some aspects of the application of electrochemical impedance spectroscopy to studies of solid electrode / solution interface, in the absence of faradaic processes, are analysed. In order to perform this analysis, gold electrodes with (111) and (210) crystallographic orientations in an aqueous solution containing 10 mmol dm-3 KF, as supporting electrolyte, and a pyridine concentration varying from 0.01 to 4.6 mmol dm-3, were used. The experimental data was analysed by using EQUIVCRT software, which utilises non-linear least squares routines, attributing to the solid electrode / solution interface behaviour described by an equivalent circuit with a resistance in series with a constant phase element. The results of this fitting procedure were analysed by the dependence on the electrode potential on two parameters: the pre-exponential factor, Y0, and the exponent n f, related with the phase angle shift. By this analysis it was possible to observe that the pyridine adsorption is strongly affected by the crystallographic orientation of the electrode surface and that the extent of deviation from ideal capacitive behaviour is mainly of interfacial origin. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/report |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
report |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702003000200004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702003000200004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-46702003000200004 |
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 |
Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP |
publisher.none.fl_str_mv |
Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP |
dc.source.none.fl_str_mv |
Eclética Química v.28 n.2 2003 reponame:Eclética Química instname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Eclética Química |
collection |
Eclética Química |
repository.name.fl_str_mv |
Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) |
repository.mail.fl_str_mv |
ecletica@ctrlk.com.br||ecletica@iq.unesp.br |
_version_ |
1754734617643974656 |