Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.matchemphys.2020.123392 http://hdl.handle.net/11449/208825 |
Resumo: | The layered structure of hydrotalcite-like compounds is responsible for many chemical and physical properties attractive in designing electrodes for analytical applications. Mg/Al hydrotalcite-like materials were prepared with different Mg/Al molar ratios ranging from 1.5:1 to 6:1 and electrochemically characterized before being included into epoxy-graphite to form the electrode matrix. The electrochemical response of the electrodes was evaluated by the use of potassium ferro/ferricyanide redox pair as a probe for voltammetry and impedance spectroscopy. The electm-catalytic effect on the potassium ferm/ferricyanide redox pair showed was more effective when Mg and Al is 1.5:/1 M proportion due, apparently, to the more positively charged hydrotalcite layers and more affinity for anions such as Fe(CN)(6)(3-/4-). This epoxy-graphite-hydrotalcite composite presents the lowest potential difference and lowest loading transfer resistance associated with the hydrotalcite phase, which are desirable properties for potential electroanalytical purposes. The results indicated the potential application of the epoxy-graphite-hydrotalcite electrode for ion exchange of negative-charged chemical species. |
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Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite compositesCharacterizedEpoxy-graphite-hydrotalciteElectro-catalysisModified electrodesThe layered structure of hydrotalcite-like compounds is responsible for many chemical and physical properties attractive in designing electrodes for analytical applications. Mg/Al hydrotalcite-like materials were prepared with different Mg/Al molar ratios ranging from 1.5:1 to 6:1 and electrochemically characterized before being included into epoxy-graphite to form the electrode matrix. The electrochemical response of the electrodes was evaluated by the use of potassium ferro/ferricyanide redox pair as a probe for voltammetry and impedance spectroscopy. The electm-catalytic effect on the potassium ferm/ferricyanide redox pair showed was more effective when Mg and Al is 1.5:/1 M proportion due, apparently, to the more positively charged hydrotalcite layers and more affinity for anions such as Fe(CN)(6)(3-/4-). This epoxy-graphite-hydrotalcite composite presents the lowest potential difference and lowest loading transfer resistance associated with the hydrotalcite phase, which are desirable properties for potential electroanalytical purposes. The results indicated the potential application of the epoxy-graphite-hydrotalcite electrode for ion exchange of negative-charged chemical species.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Havana, Dept Analyt Chem, Havana, CubaSao Paulo State Univ, Dept Analyt Chem, Sao Paulo, SP, BrazilPontificia Univ Catolica Rio de Janeiro, Dept Chem, Rio De Janeiro, RJ, BrazilUniv Estado Rio De Janeiro, Dept Mech Engn & Energy, Rio De Janeiro, RJ, BrazilSao Paulo State Univ, Dept Analyt Chem, Sao Paulo, SP, BrazilCAPES: 213/14FAPERJ: E-26/202.912/2017CNPq: 409090/2018-2CNPq: 303866/2017-9Elsevier B.V.Univ HavanaUniversidade Estadual Paulista (Unesp)Pontificia Univ Catolica Rio de JaneiroUniversidade do Estado do Rio de Janeiro (UERJ)Balbin Tamayo, AbelEsteva Guas, Ana MargaritaPupim Ferreira, Antonio A. [UNESP]Aucelio, Ricardo Q.Huertas Flores, Jhonny O.2021-06-25T11:21:43Z2021-06-25T11:21:43Z2020-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article7http://dx.doi.org/10.1016/j.matchemphys.2020.123392Materials Chemistry And Physics. Lausanne: Elsevier Science Sa, v. 253, 7 p., 2020.0254-0584http://hdl.handle.net/11449/20882510.1016/j.matchemphys.2020.123392WOS:000572428400006Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Chemistry And Physicsinfo:eu-repo/semantics/openAccess2021-10-23T19:02:32Zoai:repositorio.unesp.br:11449/208825Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:02:32Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites |
title |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites |
spellingShingle |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites Balbin Tamayo, Abel Characterized Epoxy-graphite-hydrotalcite Electro-catalysis Modified electrodes |
title_short |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites |
title_full |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites |
title_fullStr |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites |
title_full_unstemmed |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites |
title_sort |
Influence of molar fraction of Mg/Al, on the electrochemical behavior of hycrotalcite-epoxy-graphite composites |
author |
Balbin Tamayo, Abel |
author_facet |
Balbin Tamayo, Abel Esteva Guas, Ana Margarita Pupim Ferreira, Antonio A. [UNESP] Aucelio, Ricardo Q. Huertas Flores, Jhonny O. |
author_role |
author |
author2 |
Esteva Guas, Ana Margarita Pupim Ferreira, Antonio A. [UNESP] Aucelio, Ricardo Q. Huertas Flores, Jhonny O. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Univ Havana Universidade Estadual Paulista (Unesp) Pontificia Univ Catolica Rio de Janeiro Universidade do Estado do Rio de Janeiro (UERJ) |
dc.contributor.author.fl_str_mv |
Balbin Tamayo, Abel Esteva Guas, Ana Margarita Pupim Ferreira, Antonio A. [UNESP] Aucelio, Ricardo Q. Huertas Flores, Jhonny O. |
dc.subject.por.fl_str_mv |
Characterized Epoxy-graphite-hydrotalcite Electro-catalysis Modified electrodes |
topic |
Characterized Epoxy-graphite-hydrotalcite Electro-catalysis Modified electrodes |
description |
The layered structure of hydrotalcite-like compounds is responsible for many chemical and physical properties attractive in designing electrodes for analytical applications. Mg/Al hydrotalcite-like materials were prepared with different Mg/Al molar ratios ranging from 1.5:1 to 6:1 and electrochemically characterized before being included into epoxy-graphite to form the electrode matrix. The electrochemical response of the electrodes was evaluated by the use of potassium ferro/ferricyanide redox pair as a probe for voltammetry and impedance spectroscopy. The electm-catalytic effect on the potassium ferm/ferricyanide redox pair showed was more effective when Mg and Al is 1.5:/1 M proportion due, apparently, to the more positively charged hydrotalcite layers and more affinity for anions such as Fe(CN)(6)(3-/4-). This epoxy-graphite-hydrotalcite composite presents the lowest potential difference and lowest loading transfer resistance associated with the hydrotalcite phase, which are desirable properties for potential electroanalytical purposes. The results indicated the potential application of the epoxy-graphite-hydrotalcite electrode for ion exchange of negative-charged chemical species. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-10-01 2021-06-25T11:21:43Z 2021-06-25T11:21:43Z |
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/10.1016/j.matchemphys.2020.123392 Materials Chemistry And Physics. Lausanne: Elsevier Science Sa, v. 253, 7 p., 2020. 0254-0584 http://hdl.handle.net/11449/208825 10.1016/j.matchemphys.2020.123392 WOS:000572428400006 |
url |
http://dx.doi.org/10.1016/j.matchemphys.2020.123392 http://hdl.handle.net/11449/208825 |
identifier_str_mv |
Materials Chemistry And Physics. Lausanne: Elsevier Science Sa, v. 253, 7 p., 2020. 0254-0584 10.1016/j.matchemphys.2020.123392 WOS:000572428400006 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Chemistry And Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
7 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
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_ |
1803046269639196672 |