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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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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Biblioteca |
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| Registros recuperados : 27 | |
| 4. |  | PEREIRA, J. B. M.; MORAES, R. N. de S.; SILVA, S. S. da. Aptidão natural para o cultivo de cana-de-açúcar. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 103-110.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 5. | | LESSA, L. S.; OLIVEIRA, T. K. de; MORAES, R. N. de S.; SILVA, S. S. da. Aptidão natural para o cultivo de citros. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 123-131.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 6. | | ALVARES, V. de S.; NEGREIROS, J. R. da S.; MORAES, R. N. de S. Aptidão natural para o cultivo de mamão. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 133-141.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 7. | | PEREIRA, J. B. M.; MORAES, R. N. de S.; CARMO, L. F. Z. do. Aptidão natural para o cultivo de mamona. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 163-171.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 8. | | NEGREIROS, J. R. da S.; ALVARES, V. de S.; MORAES, R. N. de S. Aptidão natural para o cultivo de maracujá. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 143-150.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 15. | | SOUZA, S. R. de; ARAÚJO NETO, S. E. de A.; OLIVEIRA, T. K. de; MORAES, R. N. de S. Aptidão natural para o cultivo de abacaxi. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 173-180.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 16. | | OLIVEIRA, T. K. de; MORAES, R. N. de S.; SILVA, S. S. da; CARMO, L. F. Z. do. Aptidão natural para o cultivo de banana. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 60-69.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 17. | | SANTOS, F. C. B. dos; MORAES, R. N. de S.; OLIVEIRA, T. K. de; LESSA, L. S. Aptidão natural para o cultivo de cupuaçu. In: MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. (org.). Aptidão natural dos solos do Pólo Agroflorestal Geraldo Mesquita, no município de Rio Branco, AC. Rio Branco, AC: Prefeitura Municipal, 2008. p. 153-161.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 18. | | CARMO, L. F. Z. do; MORAES, R. N. de S.; OLIVEIRA, T. K. de; VALENTIM, J. F. Análise por geoprocessamento da aptidão natural dos solos do pólo agroflorestal do Geraldo Mesquita, Rio Branco/AC. In: CONGRESSO BRASILEIRO DE CARTOGRAFIA, 24.; CONGRESSO BRASILEIRO DE GEOPROCESSAMENTO, 2.; EXPOSICARTA, 22., 2010, Aracaju. Cartografia, ferramenta para ordenamento e gestão territorial. Rio de Janeiro: SBC, 2010. p. 1177-1185. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| Registros recuperados : 27 | |
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