Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s11581-021-03933-1 http://hdl.handle.net/11449/205778 |
Resumo: | Electroactive Co3O4 films were deposited by reactive magnetron sputtering (RMS) onto an assembly composed of a thin TiO2 layer over a commercial indium-doped tin oxide (ITO) conductor electrode, forming an ITO/TiO2/Co3O4 electrocatalytic platform. The platform was tested as a non-enzymatic device for glucose electrooxidation. The characterization of the electroactive TiO2/Co3O4 heterojunction was carried out by x-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscope (FE-SEM), and energy dispersive spectroscopy (EDS) techniques. It was shown that the Co3O4 top layer is homogeneous and free from undesirable secondary phases. The electrochemical measurements, characterization and performance, were carried out by cyclic voltammetry (CV), chronoamperometry, and electrochemical impedance spectroscopy (EIS). The cyclic voltammogram shows the linear dependence between the anodic and cathodic current peak of the redox process at the electrode surface, showing the electrochemical activity of the Co3+/Co4+ redox pair, as well as good reversibility and efficiency of charge transfer. From the chronoamperometric curves, two electrochemical parameters were estimated, the diffusion coefficient (D) and catalytic rate constant (kobs) of glucose with the values of 1.2 × 10−6 cm2 s−1 and 2.8 × 106 cm3 mol−1 s−1, respectively. The ITO/TiO2/Co3O4 heterojunction electrode showed an acceptable linear range from 10 to 1000 μM glucose concentration with a molar sensitivity (S) of 30.0 μA cm−2 mM−1 and a detection limit (LOD) of 1.42 μM (S/N = 3). These electrochemical results show the higher electroactivity of TiO2/Co3O4 heterojunction electrode than that of bare Co3O4 electrode and other literature results. |
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Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidationGlucose electrooxidationHeterojunctionITO/TIO2/Co3O4Non-enzymaticReactive magnetron sputtering (RMS)Electroactive Co3O4 films were deposited by reactive magnetron sputtering (RMS) onto an assembly composed of a thin TiO2 layer over a commercial indium-doped tin oxide (ITO) conductor electrode, forming an ITO/TiO2/Co3O4 electrocatalytic platform. The platform was tested as a non-enzymatic device for glucose electrooxidation. The characterization of the electroactive TiO2/Co3O4 heterojunction was carried out by x-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscope (FE-SEM), and energy dispersive spectroscopy (EDS) techniques. It was shown that the Co3O4 top layer is homogeneous and free from undesirable secondary phases. The electrochemical measurements, characterization and performance, were carried out by cyclic voltammetry (CV), chronoamperometry, and electrochemical impedance spectroscopy (EIS). The cyclic voltammogram shows the linear dependence between the anodic and cathodic current peak of the redox process at the electrode surface, showing the electrochemical activity of the Co3+/Co4+ redox pair, as well as good reversibility and efficiency of charge transfer. From the chronoamperometric curves, two electrochemical parameters were estimated, the diffusion coefficient (D) and catalytic rate constant (kobs) of glucose with the values of 1.2 × 10−6 cm2 s−1 and 2.8 × 106 cm3 mol−1 s−1, respectively. The ITO/TiO2/Co3O4 heterojunction electrode showed an acceptable linear range from 10 to 1000 μM glucose concentration with a molar sensitivity (S) of 30.0 μA cm−2 mM−1 and a detection limit (LOD) of 1.42 μM (S/N = 3). These electrochemical results show the higher electroactivity of TiO2/Co3O4 heterojunction electrode than that of bare Co3O4 electrode and other literature results.Department of Physics FC UNESP – São Paulo State UniversityGrupo de Pesquisa em Materiais Fotônicos e Energias Renováveis UFGD – Universidade Federal de Grande DouradosLaboratório de Plasmas e Processos ITA - Instituto Tecnológico de AeronáuticaIndustrial Technical College Engineering College UNESP – São Paulo State UniversityDepartment of Physics FC UNESP – São Paulo State UniversityIndustrial Technical College Engineering College UNESP – São Paulo State UniversityUniversidade Estadual Paulista (Unesp)UFGD – Universidade Federal de Grande DouradosITA - Instituto Tecnológico de AeronáuticaNeto, Nilton Francelosi Azevedo [UNESP]de Jesus Pereira, André LuizLeite, Douglas Marcel Gonçalvesda Silva, José Humberto Dias [UNESP]da Silva Pelissari, Marcelo Rodrigues [UNESP]2021-06-25T10:21:07Z2021-06-25T10:21:07Z2021-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1597-1609http://dx.doi.org/10.1007/s11581-021-03933-1Ionics, v. 27, n. 4, p. 1597-1609, 2021.1862-07600947-7047http://hdl.handle.net/11449/20577810.1007/s11581-021-03933-12-s2.0-85099817671Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengIonicsinfo:eu-repo/semantics/openAccess2021-10-22T17:19:52Zoai:repositorio.unesp.br:11449/205778Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T17:19:52Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation |
title |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation |
spellingShingle |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation Neto, Nilton Francelosi Azevedo [UNESP] Glucose electrooxidation Heterojunction ITO/TIO2/Co3O4 Non-enzymatic Reactive magnetron sputtering (RMS) |
title_short |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation |
title_full |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation |
title_fullStr |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation |
title_full_unstemmed |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation |
title_sort |
Evaluation of ITO/TiO2/Co3O4 as a non-enzymatic heterojunction electrode to glucose electrooxidation |
author |
Neto, Nilton Francelosi Azevedo [UNESP] |
author_facet |
Neto, Nilton Francelosi Azevedo [UNESP] de Jesus Pereira, André Luiz Leite, Douglas Marcel Gonçalves da Silva, José Humberto Dias [UNESP] da Silva Pelissari, Marcelo Rodrigues [UNESP] |
author_role |
author |
author2 |
de Jesus Pereira, André Luiz Leite, Douglas Marcel Gonçalves da Silva, José Humberto Dias [UNESP] da Silva Pelissari, Marcelo Rodrigues [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) UFGD – Universidade Federal de Grande Dourados ITA - Instituto Tecnológico de Aeronáutica |
dc.contributor.author.fl_str_mv |
Neto, Nilton Francelosi Azevedo [UNESP] de Jesus Pereira, André Luiz Leite, Douglas Marcel Gonçalves da Silva, José Humberto Dias [UNESP] da Silva Pelissari, Marcelo Rodrigues [UNESP] |
dc.subject.por.fl_str_mv |
Glucose electrooxidation Heterojunction ITO/TIO2/Co3O4 Non-enzymatic Reactive magnetron sputtering (RMS) |
topic |
Glucose electrooxidation Heterojunction ITO/TIO2/Co3O4 Non-enzymatic Reactive magnetron sputtering (RMS) |
description |
Electroactive Co3O4 films were deposited by reactive magnetron sputtering (RMS) onto an assembly composed of a thin TiO2 layer over a commercial indium-doped tin oxide (ITO) conductor electrode, forming an ITO/TiO2/Co3O4 electrocatalytic platform. The platform was tested as a non-enzymatic device for glucose electrooxidation. The characterization of the electroactive TiO2/Co3O4 heterojunction was carried out by x-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscope (FE-SEM), and energy dispersive spectroscopy (EDS) techniques. It was shown that the Co3O4 top layer is homogeneous and free from undesirable secondary phases. The electrochemical measurements, characterization and performance, were carried out by cyclic voltammetry (CV), chronoamperometry, and electrochemical impedance spectroscopy (EIS). The cyclic voltammogram shows the linear dependence between the anodic and cathodic current peak of the redox process at the electrode surface, showing the electrochemical activity of the Co3+/Co4+ redox pair, as well as good reversibility and efficiency of charge transfer. From the chronoamperometric curves, two electrochemical parameters were estimated, the diffusion coefficient (D) and catalytic rate constant (kobs) of glucose with the values of 1.2 × 10−6 cm2 s−1 and 2.8 × 106 cm3 mol−1 s−1, respectively. The ITO/TiO2/Co3O4 heterojunction electrode showed an acceptable linear range from 10 to 1000 μM glucose concentration with a molar sensitivity (S) of 30.0 μA cm−2 mM−1 and a detection limit (LOD) of 1.42 μM (S/N = 3). These electrochemical results show the higher electroactivity of TiO2/Co3O4 heterojunction electrode than that of bare Co3O4 electrode and other literature results. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:21:07Z 2021-06-25T10:21:07Z 2021-04-01 |
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://dx.doi.org/10.1007/s11581-021-03933-1 Ionics, v. 27, n. 4, p. 1597-1609, 2021. 1862-0760 0947-7047 http://hdl.handle.net/11449/205778 10.1007/s11581-021-03933-1 2-s2.0-85099817671 |
url |
http://dx.doi.org/10.1007/s11581-021-03933-1 http://hdl.handle.net/11449/205778 |
identifier_str_mv |
Ionics, v. 27, n. 4, p. 1597-1609, 2021. 1862-0760 0947-7047 10.1007/s11581-021-03933-1 2-s2.0-85099817671 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ionics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1597-1609 |
dc.source.none.fl_str_mv |
Scopus 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 |
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1799965095103561728 |