Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol

Detalhes bibliográficos
Autor(a) principal: VIÉGAS, Deracilde Santana da Silva
Data de Publicação: 2019
Tipo de documento: Tese
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFMA
Texto Completo: https://tedebc.ufma.br/jspui/handle/tede/tede/2864
Resumo: In the present work, the ruthenium (III) hexacyanoferrate complex was tested for glycerol oxidation using two distinct forms of modification of the vitreous carbon electrode. In the first one, the vitreous carbon electrode was modified by electrodeposition through cyclic voltammetry at determined potential and already described in the literature, and in the second, the carbon glass electrode was modified by nanoparticles supported on Vulcan XC-72 carbon, which were synthesized by the alcohol reduction method. Subsequently, the electrocatalysts were characterized by chemical-chemical techniques and tested by electrochemical techniques. The physico-chemical characterization of ruthenium hexacyanoferrate (III) was carried out by Electron Spectrophotometry in the UV-Vis region (UV-Vis), Infrared Vibrational Spectroscopy (FTIR), Electron Transmission Electron Microscopy (TEM), Dispersive Energy X-rays (EDX) and X-ray Diffraction (XRD). Electrochemical characterization occurred by cyclic voltammetry, rotational disk electrode, chronoamperometry and electrochemical impedance spectroscopy (EIS). EDX analysis for the nanoparticles showed that the theoretical starting composition is approximately the same experimentally proven. XRD and TEM analyzes provided the size of the synthesized particles on the order of 3.8 nm, as well as the distribution and dispersion in the carbon carrier. The electrochemical results on the glycerol oxidation reaction showed that the synthesis performed by the alcohol reduction method showed an increase in electrocatalytic current when compared to the unmodified electrode. Through a study with a rotating disk electrode it was possible to verify the involvement of 3.8 electrons in the oxidation reaction of glycerol. Electrochemical impedance spectroscopy has shown that the charge transfer resistance of glycerol electro-oxidation decreases as the potential and concentration of glycerol increase. The carbon-supported ruthenium hexacyanoferrate nanoparticle-modified electrode showed an efficiency in the glycerol oxidation reaction being a viable option for use as a catalyst in direct alcohol fuel cells.
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spelling MARQUES, Aldaléa Lopes Brandes076486263-49http://lattes.cnpq.br/0121030502015990MARQUES, Aldaléa Lopes Brandes076486263-49http://lattes.cnpq.br/0121030502015990BRITO, Natilene Mesquitahttp://lattes.cnpq.br/5662692111796966RODRIGUES, Isaide de Araújohttp://lattes.cnpq.br/3696115712661158LUZ, Rita de Cassia Silvahttp://lattes.cnpq.br/1282444701404832LIMA, Roberto Batista dehttp://lattes.cnpq.br/4982744838486744013991003-43http://lattes.cnpq.br/5345949888760079VIÉGAS, Deracilde Santana da Silva2019-10-01T13:46:54Z2019-04-05VIÉGAS, Deracilde Santana da Silva. Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol. 2019. 100 f. Tese (Programa de Pós-Graduação em Rede - Rede de Biodiversidade e Biotecnologia da Amazônia Legal/CCBS) - Universidade Federal do Maranhão, São Luís, 2019.https://tedebc.ufma.br/jspui/handle/tede/tede/2864In the present work, the ruthenium (III) hexacyanoferrate complex was tested for glycerol oxidation using two distinct forms of modification of the vitreous carbon electrode. In the first one, the vitreous carbon electrode was modified by electrodeposition through cyclic voltammetry at determined potential and already described in the literature, and in the second, the carbon glass electrode was modified by nanoparticles supported on Vulcan XC-72 carbon, which were synthesized by the alcohol reduction method. Subsequently, the electrocatalysts were characterized by chemical-chemical techniques and tested by electrochemical techniques. The physico-chemical characterization of ruthenium hexacyanoferrate (III) was carried out by Electron Spectrophotometry in the UV-Vis region (UV-Vis), Infrared Vibrational Spectroscopy (FTIR), Electron Transmission Electron Microscopy (TEM), Dispersive Energy X-rays (EDX) and X-ray Diffraction (XRD). Electrochemical characterization occurred by cyclic voltammetry, rotational disk electrode, chronoamperometry and electrochemical impedance spectroscopy (EIS). EDX analysis for the nanoparticles showed that the theoretical starting composition is approximately the same experimentally proven. XRD and TEM analyzes provided the size of the synthesized particles on the order of 3.8 nm, as well as the distribution and dispersion in the carbon carrier. The electrochemical results on the glycerol oxidation reaction showed that the synthesis performed by the alcohol reduction method showed an increase in electrocatalytic current when compared to the unmodified electrode. Through a study with a rotating disk electrode it was possible to verify the involvement of 3.8 electrons in the oxidation reaction of glycerol. Electrochemical impedance spectroscopy has shown that the charge transfer resistance of glycerol electro-oxidation decreases as the potential and concentration of glycerol increase. The carbon-supported ruthenium hexacyanoferrate nanoparticle-modified electrode showed an efficiency in the glycerol oxidation reaction being a viable option for use as a catalyst in direct alcohol fuel cells.No presente trabalho, o complexo de hexacianoferrato de rutênio (III) foi testado para oxidação de glicerol empregando-se duas formas distintas de modificação do eletrodo de carbono vítreo. Na primeira, o eletrodo de carbono vítreo foi modificado por eletrodeposição, através de voltametria cíclica em potencial determinado e já descrito na literatura, e na segunda modificou-se o eletrodo de carbono vítreo por nanopartículas suportadas em carbono Vulcan XC-72, que foram sintetizadas pelo método de redução por álcool. Posteriormente, os eletrocatalisadores foram caracterizados por técnicas fisco-quimicas e testados por técnicas eletroquímicas. A caracterização físico-química de hexacianoferrato de rutênio (III) se deu por Espectrofotometria Eletrônica na região do UV-Vis (UV-Vis), Espectroscopia Vibracional na região do Infravermelho (FTIR), Microscopia Eletrônica de Transmissão (MET), Energia dispersiva de raios-X (EDX) e Difração de Raios-X (DRX). As caracterizações eletroquímicas ocorreram por voltametria cíclica, eletrodo de disco rotatório, cronoamperometria e Espectroscopia de impedância eletroquímica (EIE). A análise de EDX para as nanoparticulas mostrou que a composição teórica de partida é aproximadamente a mesma comprovada experimentalmente. As análises de DRX e MET forneceram o tamanho das partículas sintetizadas na ordem de 3,8 nm, bem como a distribuição e dispersão no suporte de carbono. Os resultados eletroquímicos frente a reação de oxidação de glicerol mostraram que a síntese realizada pelo método de redução por alcool mostrou aumento de corrente eletrocatalítica quando comparado ao eletrodo não modificado. Através de estudo com eletrodo de disco rotátorio foi possível verificar o envolvimento de 3,8 elétrons na reação de oxidação de glicerol. A espectroscopia de impedância eletroquímica mostrou que a resistência de transferência de carga da eletro-oxidação de glicerol diminui à medida que o potencial e a concentração de glicerol aumentam. O eletrodo modificado com nanopartícula de hexacianoferrato de rutênio suportado em carbono apresentou uma eficiência na reação de oxidação de glicerol sendo uma opção viável para uso como catalisador em células a combustível de álcool direto.Submitted by Daniella Santos (daniella.santos@ufma.br) on 2019-10-01T13:46:54Z No. of bitstreams: 1 DeracildeViégas.pdf: 1822029 bytes, checksum: 2b4546db1bd0f9bbc987977648cfc7da (MD5)Made available in DSpace on 2019-10-01T13:46:54Z (GMT). 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dc.title.por.fl_str_mv Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
dc.title.alternative.eng.fl_str_mv Electrocatalytic activity of ruthenium hexacyanoferrate nanoparticles for glycerol electrooxidation
title Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
spellingShingle Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
VIÉGAS, Deracilde Santana da Silva
Eletro-oxidação
Glicerol
Hexacianoferrato de Rutênio
Nanopartículas
Electrooxidation
Glycerol
Ruthenium-Hexacyanoferrate
Nanoparticles
Eletroquímica
title_short Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
title_full Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
title_fullStr Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
title_full_unstemmed Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
title_sort Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol
author VIÉGAS, Deracilde Santana da Silva
author_facet VIÉGAS, Deracilde Santana da Silva
author_role author
dc.contributor.advisor1.fl_str_mv MARQUES, Aldaléa Lopes Brandes
dc.contributor.advisor1ID.fl_str_mv 076486263-49
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/0121030502015990
dc.contributor.referee1.fl_str_mv MARQUES, Aldaléa Lopes Brandes
dc.contributor.referee1ID.fl_str_mv 076486263-49
dc.contributor.referee1Lattes.fl_str_mv http://lattes.cnpq.br/0121030502015990
dc.contributor.referee2.fl_str_mv BRITO, Natilene Mesquita
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/5662692111796966
dc.contributor.referee3.fl_str_mv RODRIGUES, Isaide de Araújo
dc.contributor.referee3Lattes.fl_str_mv http://lattes.cnpq.br/3696115712661158
dc.contributor.referee4.fl_str_mv LUZ, Rita de Cassia Silva
dc.contributor.referee4Lattes.fl_str_mv http://lattes.cnpq.br/1282444701404832
dc.contributor.referee5.fl_str_mv LIMA, Roberto Batista de
dc.contributor.referee5Lattes.fl_str_mv http://lattes.cnpq.br/4982744838486744
dc.contributor.authorID.fl_str_mv 013991003-43
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/5345949888760079
dc.contributor.author.fl_str_mv VIÉGAS, Deracilde Santana da Silva
contributor_str_mv MARQUES, Aldaléa Lopes Brandes
MARQUES, Aldaléa Lopes Brandes
BRITO, Natilene Mesquita
RODRIGUES, Isaide de Araújo
LUZ, Rita de Cassia Silva
LIMA, Roberto Batista de
dc.subject.por.fl_str_mv Eletro-oxidação
Glicerol
Hexacianoferrato de Rutênio
Nanopartículas
topic Eletro-oxidação
Glicerol
Hexacianoferrato de Rutênio
Nanopartículas
Electrooxidation
Glycerol
Ruthenium-Hexacyanoferrate
Nanoparticles
Eletroquímica
dc.subject.eng.fl_str_mv Electrooxidation
Glycerol
Ruthenium-Hexacyanoferrate
Nanoparticles
dc.subject.cnpq.fl_str_mv Eletroquímica
description In the present work, the ruthenium (III) hexacyanoferrate complex was tested for glycerol oxidation using two distinct forms of modification of the vitreous carbon electrode. In the first one, the vitreous carbon electrode was modified by electrodeposition through cyclic voltammetry at determined potential and already described in the literature, and in the second, the carbon glass electrode was modified by nanoparticles supported on Vulcan XC-72 carbon, which were synthesized by the alcohol reduction method. Subsequently, the electrocatalysts were characterized by chemical-chemical techniques and tested by electrochemical techniques. The physico-chemical characterization of ruthenium hexacyanoferrate (III) was carried out by Electron Spectrophotometry in the UV-Vis region (UV-Vis), Infrared Vibrational Spectroscopy (FTIR), Electron Transmission Electron Microscopy (TEM), Dispersive Energy X-rays (EDX) and X-ray Diffraction (XRD). Electrochemical characterization occurred by cyclic voltammetry, rotational disk electrode, chronoamperometry and electrochemical impedance spectroscopy (EIS). EDX analysis for the nanoparticles showed that the theoretical starting composition is approximately the same experimentally proven. XRD and TEM analyzes provided the size of the synthesized particles on the order of 3.8 nm, as well as the distribution and dispersion in the carbon carrier. The electrochemical results on the glycerol oxidation reaction showed that the synthesis performed by the alcohol reduction method showed an increase in electrocatalytic current when compared to the unmodified electrode. Through a study with a rotating disk electrode it was possible to verify the involvement of 3.8 electrons in the oxidation reaction of glycerol. Electrochemical impedance spectroscopy has shown that the charge transfer resistance of glycerol electro-oxidation decreases as the potential and concentration of glycerol increase. The carbon-supported ruthenium hexacyanoferrate nanoparticle-modified electrode showed an efficiency in the glycerol oxidation reaction being a viable option for use as a catalyst in direct alcohol fuel cells.
publishDate 2019
dc.date.accessioned.fl_str_mv 2019-10-01T13:46:54Z
dc.date.issued.fl_str_mv 2019-04-05
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dc.identifier.citation.fl_str_mv VIÉGAS, Deracilde Santana da Silva. Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol. 2019. 100 f. Tese (Programa de Pós-Graduação em Rede - Rede de Biodiversidade e Biotecnologia da Amazônia Legal/CCBS) - Universidade Federal do Maranhão, São Luís, 2019.
dc.identifier.uri.fl_str_mv https://tedebc.ufma.br/jspui/handle/tede/tede/2864
identifier_str_mv VIÉGAS, Deracilde Santana da Silva. Atividade eletrocatalítica de nanopartículas de hexacianoferrato de rutênio para eletro-oxidação de glicerol. 2019. 100 f. Tese (Programa de Pós-Graduação em Rede - Rede de Biodiversidade e Biotecnologia da Amazônia Legal/CCBS) - Universidade Federal do Maranhão, São Luís, 2019.
url https://tedebc.ufma.br/jspui/handle/tede/tede/2864
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dc.publisher.initials.fl_str_mv UFMA
dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv DEPARTAMENTO DE TECNOLOGIA QUÍMICA/CCET
publisher.none.fl_str_mv Universidade Federal do Maranhão
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