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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
23/11/2022 |
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Data da última atualização: |
23/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, P. F. da; RIBEIRO, T. S.; GOMES, B. F.; SILVA, G. T. S. T. da; LOBO, C. M. S.; CARMO, M.; OLIVEIRA, C. R. de; BERNARDES FILHO, R.; ROTH, C.; COLNAGO, L. A. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA; RUBENS BERNARDES FILHO, CNPDIA; LUIZ ALBERTO COLNAGO, CNPDIA. |
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Título: |
Miniaturized carbon fiber paper electrodes for In situ high resolution NMR analyses. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Analalytical Chemistry, v. 94, 2022. |
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Páginas: |
15223–15230 |
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DOI: |
https://doi.org/10.1021/acs.analchem.2c02058 |
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Idioma: |
Inglês |
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Conteúdo: |
Combining spectroscopic techniques with electrochemistry is a promising strategy, as it allows the detailed investigation of the species that are consumed and produced by the reaction in real time. However, as with any in situ coupling technique, the junction between NMR and electrochemistry presents some challenges, notably the distortion of NMR signals due to the placement of electrodes close to or within the detection region. In this work, miniaturized electrodes made of carbon fiber paper were developed and later modified with platinum. Platinum decoration by cathodic deposition was chosen, as platinum is a prominent element in electrocatalysis, able to catalyze a large variety of reactions. To evaluate the efficiency of this electrochemical system, the oxidation of ascorbic acid was used as amodel reaction. It was observed that the electrodes caused substantial signal distortion when placed within the detection region (full width at half-maximum equal to 1.46 Hz), whereas no distortion was observed when the electrodes were placed 1 mm above the detection region (full width at half-maximum equal to 0.95 Hz). With this system, it was also possible to monitor the magnetoelectrolysis effect, caused by the interaction of the magnetic field with the flowing ions, leading to a doubling of the ascorbic acid oxidation rate, compared to the reaction performed without a magnetic field. In addition to its low cost and simplicity in preparation, the developed electrode system allows the electrode surface to be easily modified with other suitable catalysts. MenosCombining spectroscopic techniques with electrochemistry is a promising strategy, as it allows the detailed investigation of the species that are consumed and produced by the reaction in real time. However, as with any in situ coupling technique, the junction between NMR and electrochemistry presents some challenges, notably the distortion of NMR signals due to the placement of electrodes close to or within the detection region. In this work, miniaturized electrodes made of carbon fiber paper were developed and later modified with platinum. Platinum decoration by cathodic deposition was chosen, as platinum is a prominent element in electrocatalysis, able to catalyze a large variety of reactions. To evaluate the efficiency of this electrochemical system, the oxidation of ascorbic acid was used as amodel reaction. It was observed that the electrodes caused substantial signal distortion when placed within the detection region (full width at half-maximum equal to 1.46 Hz), whereas no distortion was observed when the electrodes were placed 1 mm above the detection region (full width at half-maximum equal to 0.95 Hz). With this system, it was also possible to monitor the magnetoelectrolysis effect, caused by the interaction of the magnetic field with the flowing ions, leading to a doubling of the ascorbic acid oxidation rate, compared to the reaction performed without a magnetic field. In addition to its low cost and simplicity in preparation, the developed electrode system allows... Mostrar Tudo |
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Palavras-Chave: |
Magnetoelectrolysis effect; NMR. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02384naa a2200277 a 4500
001 2148653
005 2024-01-23
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1021/acs.analchem.2c02058$2DOI
100 1 $aSILVA, P. F. da
245 $aMiniaturized carbon fiber paper electrodes for In situ high resolution NMR analyses.$h[electronic resource]
260 $c2022
300 $a15223–15230
520 $aCombining spectroscopic techniques with electrochemistry is a promising strategy, as it allows the detailed investigation of the species that are consumed and produced by the reaction in real time. However, as with any in situ coupling technique, the junction between NMR and electrochemistry presents some challenges, notably the distortion of NMR signals due to the placement of electrodes close to or within the detection region. In this work, miniaturized electrodes made of carbon fiber paper were developed and later modified with platinum. Platinum decoration by cathodic deposition was chosen, as platinum is a prominent element in electrocatalysis, able to catalyze a large variety of reactions. To evaluate the efficiency of this electrochemical system, the oxidation of ascorbic acid was used as amodel reaction. It was observed that the electrodes caused substantial signal distortion when placed within the detection region (full width at half-maximum equal to 1.46 Hz), whereas no distortion was observed when the electrodes were placed 1 mm above the detection region (full width at half-maximum equal to 0.95 Hz). With this system, it was also possible to monitor the magnetoelectrolysis effect, caused by the interaction of the magnetic field with the flowing ions, leading to a doubling of the ascorbic acid oxidation rate, compared to the reaction performed without a magnetic field. In addition to its low cost and simplicity in preparation, the developed electrode system allows the electrode surface to be easily modified with other suitable catalysts.
653 $aMagnetoelectrolysis effect
653 $aNMR
700 1 $aRIBEIRO, T. S.
700 1 $aGOMES, B. F.
700 1 $aSILVA, G. T. S. T. da
700 1 $aLOBO, C. M. S.
700 1 $aCARMO, M.
700 1 $aOLIVEIRA, C. R. de
700 1 $aBERNARDES FILHO, R.
700 1 $aROTH, C.
700 1 $aCOLNAGO, L. A.
773 $tAnalalytical Chemistry$gv. 94, 2022.
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Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 433 | |
| 122. |  | GARCIA, A.; SILVA, J. F. V.; PEREIRA, J. E.; GAUDENCIO, C. de A.; DIAS, W. P. Efeito de especies cultivadas no inverno sobre a populacao de Heterodera glycines e o rendimento da soja, em duas regioes brasileiras. In: REUNIAO DE PESQUISA DE SOJA DA REGIAO CENTRAL DO BRASIL, 21., 1999, Dourados. Resumos... Dourados: Embrapa Agropecuaria Oeste / Londrina: Embrapa Soja, 1999. p.68-69. (Embrapa Agropecuaria Oeste. Documentos 7; Embrapa Soja. Documentos, 134).| Biblioteca(s): Embrapa Soja. |
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| 124. | | GARCIA, A.; SILVA, J. F. V.; DIAS, W. P.; PEREIRA, J. E.; GAUDÊNCIO, C. A. Efeito de espécies cultivadas no inverno sobre a redução da população do nematóides de cisto e o rendimento da soja. In: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 19., 1997, Jaboticabal. Ata e resumos. Londrina: Embrapa-CNPSo, 1997. p. 183-184. (Embrapa-CNPSo. Documentos, 107).| Biblioteca(s): Embrapa Soja. |
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| 125. | | GARCIA, A.; DIAS, W. P.; SILVA, J. F. V.; ZITO, R. K.; SANTOS, A. F. C. Effect of soil pH on Heterodera glycines population density in Brazil. Nematology, Leiden, v. 4, n. 2, p. 252, 2002. Presented in Fourth International Congress of Nematology. Programme and abstracts. 8-13 June 2002, Tenbel, La Galletas, Arona, Tenerife, Canary Islands, Spain.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 127. | | SILVA, J. F. V.; VERONEZZI, G.; LIMA, C. G.; DIAS, W.; HOFFMANN-CAMPO, C. B. Inoculação de Meloidogyne javanica e seu efeito na concentração de isoflavonóides em genótipos de soja resistentes e suscetíveis a nematóide. In: INTERNATIONAL CONGRESS OF TROPICAL NEMATOLOGY, 2., 2009, Maceió. Abstracts... Maceió: ONTA: SBN, 2009. Poster presentation: Resistence, Resumo 30. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 134. | | FERRACIN, L. M.; SILVA, J. F. V.; CATTELAN, A. J.; BETTI, A. F. F. Inhibition of Heterodera glycines and Meloidogyne javanica nematoides in soybean by rhizobacteria in greenhouse trials. In: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004. p. 92. (Embrapa Soja. Documentos, 228). Editado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi.| Biblioteca(s): Embrapa Soja. |
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| 137. | | PEREIRA, J. E.; SILVA, J. F. V.; DIAS, W. P.; SOUZA, G. da S. e. Intervalo de confiança "Bootstrap" como ferramenta para classificar raças do nematóide de cisto da soja. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 2, p. 271-275, fev. 2000. Título em inglês: Bootstrap confidence intervals as tool to classify races of soybean's cyst nematode.| Biblioteca(s): Embrapa Soja; Embrapa Unidades Centrais. |
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| 139. | | SILVA, J. F. V.; FERRAZ, L. C. C. E.; ARIAS, C. A.; ABDELNOOR, R. V. Identificacao de marcadores moleculares de microssatelites associados a resistencia de genotipos de soja a Meloidogyne javanica. In: CONGRESSO BRASILEIRO DE NEMATOLOGIA, 23., 2001, Marilia. Anais... Piracicaba: SBN; Garca: FAEF, 2001. p. 63. Publicado tambem em Nematologia Brasileira, Brasília, DF, v.25, n.1, p. 106, jun. 2001. Resumos.| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 433 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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