rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.apsusc.2017.06.221 http://hdl.handle.net/11449/159704 |
Resumo: | Reduced graphene oxide-zinc oxide (rGO-ZnO) nanocomposites were successfully synthesized using a facile microwave-hydrothermal method under mild conditions, and their electrocatalytic properties towards O-2 evolution were investigated. The microwave radiation played an important role in obtainment of well dispersed ZnO nanoparticles directly on reduced graphene oxide sheets without any additional reducing reagents or passivation agent. X-ray diffraction (XRD), Raman and infrared spectroscopies indicated the reduction of GO as well as the successful synthesis of rGO-ZnO nanocomposites. The chemical states of the samples were shown by XPS analyses. Due to the synergic effect, the resulting nanocomposites exhibited high electronic interaction between ZnO and rGO sheets, which improved the electrocatalytic oxidation of water with low onset potential of 0.48 V (vs. Ag/AgCl) in neutral pH and long-term stability, with high current density during electrolysis. The overpotential for water oxidation decreased in alkaline pH, suggesting useful insight on the catalytic mechanism for O-2 evolution. (C) 2017 Elsevier B.V. All rights reserved. |
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rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal methodZinc oxideGrapheneNanoparticlesMicrowaveElectrocatalysis O-2 evolutionReduced graphene oxide-zinc oxide (rGO-ZnO) nanocomposites were successfully synthesized using a facile microwave-hydrothermal method under mild conditions, and their electrocatalytic properties towards O-2 evolution were investigated. The microwave radiation played an important role in obtainment of well dispersed ZnO nanoparticles directly on reduced graphene oxide sheets without any additional reducing reagents or passivation agent. X-ray diffraction (XRD), Raman and infrared spectroscopies indicated the reduction of GO as well as the successful synthesis of rGO-ZnO nanocomposites. The chemical states of the samples were shown by XPS analyses. Due to the synergic effect, the resulting nanocomposites exhibited high electronic interaction between ZnO and rGO sheets, which improved the electrocatalytic oxidation of water with low onset potential of 0.48 V (vs. Ag/AgCl) in neutral pH and long-term stability, with high current density during electrolysis. The overpotential for water oxidation decreased in alkaline pH, suggesting useful insight on the catalytic mechanism for O-2 evolution. (C) 2017 Elsevier B.V. All rights reserved.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Financiadora de Estudos e Projetos (FINEP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)Univ Fed Uberlandia, Inst Quim, BR-38400902 Uberlandia, MG, BrazilUniv Estadual Paulista, LIEC, Inst Quim, BR-14800900 Araraquara, SP, BrazilUniv Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, BrazilUniv Fed Sao Carlos, Dept Quim, LIEC, BR-13565905 Sao Carlos, SP, BrazilUniv Estadual Paulista, LIEC, Inst Quim, BR-14800900 Araraquara, SP, BrazilFAPEMIG: APQ-00988-13FAPEMIG: CEX-RED-00010-14FAPEMIG: APQ-00330-14Elsevier B.V.Universidade Federal de Uberlândia (UFU)Universidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Romeiro, Fernanda C.Rodrigues, Monica A.Silva, Luiz A. J.Catto, Ariadne C. [UNESP]Silva, Luis F. daLongo, ElsonNossol, EdsonLima, Renata C.2018-11-26T15:44:57Z2018-11-26T15:44:57Z2017-11-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article743-751application/pdfhttp://dx.doi.org/10.1016/j.apsusc.2017.06.221Applied Surface Science. Amsterdam: Elsevier Science Bv, v. 423, p. 743-751, 2017.0169-4332http://hdl.handle.net/11449/15970410.1016/j.apsusc.2017.06.221WOS:000410607500084WOS000410607500084.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengApplied Surface Science1,093info:eu-repo/semantics/openAccess2023-10-20T06:07:40Zoai:repositorio.unesp.br:11449/159704Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-05-23T12:57:52.418250Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method |
title |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method |
spellingShingle |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method Romeiro, Fernanda C. Zinc oxide Graphene Nanoparticles Microwave Electrocatalysis O-2 evolution |
title_short |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method |
title_full |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method |
title_fullStr |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method |
title_full_unstemmed |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method |
title_sort |
rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method |
author |
Romeiro, Fernanda C. |
author_facet |
Romeiro, Fernanda C. Rodrigues, Monica A. Silva, Luiz A. J. Catto, Ariadne C. [UNESP] Silva, Luis F. da Longo, Elson Nossol, Edson Lima, Renata C. |
author_role |
author |
author2 |
Rodrigues, Monica A. Silva, Luiz A. J. Catto, Ariadne C. [UNESP] Silva, Luis F. da Longo, Elson Nossol, Edson Lima, Renata C. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Uberlândia (UFU) Universidade Estadual Paulista (Unesp) Universidade Federal de São Carlos (UFSCar) |
dc.contributor.author.fl_str_mv |
Romeiro, Fernanda C. Rodrigues, Monica A. Silva, Luiz A. J. Catto, Ariadne C. [UNESP] Silva, Luis F. da Longo, Elson Nossol, Edson Lima, Renata C. |
dc.subject.por.fl_str_mv |
Zinc oxide Graphene Nanoparticles Microwave Electrocatalysis O-2 evolution |
topic |
Zinc oxide Graphene Nanoparticles Microwave Electrocatalysis O-2 evolution |
description |
Reduced graphene oxide-zinc oxide (rGO-ZnO) nanocomposites were successfully synthesized using a facile microwave-hydrothermal method under mild conditions, and their electrocatalytic properties towards O-2 evolution were investigated. The microwave radiation played an important role in obtainment of well dispersed ZnO nanoparticles directly on reduced graphene oxide sheets without any additional reducing reagents or passivation agent. X-ray diffraction (XRD), Raman and infrared spectroscopies indicated the reduction of GO as well as the successful synthesis of rGO-ZnO nanocomposites. The chemical states of the samples were shown by XPS analyses. Due to the synergic effect, the resulting nanocomposites exhibited high electronic interaction between ZnO and rGO sheets, which improved the electrocatalytic oxidation of water with low onset potential of 0.48 V (vs. Ag/AgCl) in neutral pH and long-term stability, with high current density during electrolysis. The overpotential for water oxidation decreased in alkaline pH, suggesting useful insight on the catalytic mechanism for O-2 evolution. (C) 2017 Elsevier B.V. All rights reserved. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-11-30 2018-11-26T15:44:57Z 2018-11-26T15:44:57Z |
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.apsusc.2017.06.221 Applied Surface Science. Amsterdam: Elsevier Science Bv, v. 423, p. 743-751, 2017. 0169-4332 http://hdl.handle.net/11449/159704 10.1016/j.apsusc.2017.06.221 WOS:000410607500084 WOS000410607500084.pdf |
url |
http://dx.doi.org/10.1016/j.apsusc.2017.06.221 http://hdl.handle.net/11449/159704 |
identifier_str_mv |
Applied Surface Science. Amsterdam: Elsevier Science Bv, v. 423, p. 743-751, 2017. 0169-4332 10.1016/j.apsusc.2017.06.221 WOS:000410607500084 WOS000410607500084.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Applied Surface Science 1,093 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
743-751 application/pdf |
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_ |
1803045748294549504 |