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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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| Registros recuperados : 7 | |
| 1. |  | FERREIRA, E. A. B.; MEIRELLES, M. L.; FRANCO, A. C.; SANTOS, J. L. M. dos. Influência de variações ambientais sobre o fluxo de CO2 em solos sob campo limpo úmido no Cerrado. In: SIMPÓSIO NACIONAL CERRADO, 9.; SIMPÓSIO INTERNACIONAL SAVANAS TROPICAIS, 2., 2008, Brasília, DF. Desafios e estratégias para o equilíbrio entre sociedade, agronegócio e recursos naturais: anais... Planaltina, DF: Embrapa Cerrados, 2008. 7 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| 2. | | SANTOS, J. L. M. dos; PIRES, J. L. F.; STRIEDER, M. L.; MELLO, L. G. de; BRISTOT, M. Rendimento de grãos de sistemas de sucessão trigo-soja. In: MOSTRA DE INICIAÇÃO CIENTÍFICA, 10., MOSTRA DE PÓS-GRADUAÇÃO DA EMBRAPA TRIGO, 7., 2015, Passo Fundo. Resumos... Brasília, DF: Embrapa, 2015. Graduação. p. 36.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Trigo. |
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| 3. | | MATE, R.; DALMAGO, G. A.; PIRES, J. L. F.; CUNHA, G. R. da; STRIEDER, M. L.; SANTOS, M. A. dos; SANTOS, J. L. M. dos; MELLO, L. G. Correlações entre variáveis ambientais e rendimento de grãos de trigo e soja em sistemas de sucessão. In: MOSTRA DE INICIAÇÃO CIENTÍFICA, 10., MOSTRA DE PÓS-GRADUAÇÃO DA EMBRAPA TRIGO, 7., 2015, Passo Fundo. Resumos... Brasília, DF: Embrapa, 2015. Graduação PIBIC. p. 13.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Trigo. |
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| 4. | | ROSSATTO, A. da C.; CUNHA, V. dos S.; SANTOS, J. L. M. dos; FIPKE, G. M.; WINCK, E.; MÜLLER, T.; STECCA, J.; DURLO, L.; HELDWEIN, A. B.; PIRES, J. L. F.; MARTIN, T. N. Produtividade de soja em diferentes espaçamentos entre fileiras. In: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO SUL, 41., Passo Fundo, 2016. Atas e Resumos. Passo Fundo: Universidade de Passo Fundo, 2016. p. 179-185.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Trigo. |
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| 5. | | MELLO, L. G. de; STRIEDER, M. L.; PIRES, J. L. F.; DALMAGO, G. A.; VARGAS, L.; BRISTOT, M.; SANTOS, J. L. M. dos; VON MÜHLEN, L. E.; DAUERNHEIMER, R. Potencial produtivo de cultivares de soja em função de épocas de semeadura. In: MOSTRA DE INICIAÇÃO CIENTÍFICA, 10., MOSTRA DE PÓS-GRADUAÇÃO DA EMBRAPA TRIGO, 7., 2015, Passo Fundo. Resumos... Brasília, DF: Embrapa, 2015. Graduação. p. 34.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Trigo. |
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| 6. | | STRIEDER, M. L.; PIRES, J. L. F.; COSTAMILAN, L. M.; FAGANELLO, A.; VARGAS, L.; BERTAGNOLLI, P. F.; DAUERNHEIMER, R.; MELLO, L. G.; DRUM, M. A.; VON MÜHLEN, L. E.; SANTOS, J. L. M. dos. Rendimento de grãos de soja em diferentes espaçamentos entre linhas, na safra 2014/15. In COSTAMILAN, L. M.; CARRÃO-PANIZZI, M. C. (Ed.). Soja: resultados de pesquisa 2014/2015. Passo Fundo: Embrapa Trigo, 2015. p. 19-24. (Embrapa Trigo. Documentos online, 155).| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Trigo. |
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| 7. | | PIRES, J. L. F.; STRIEDER, M. L.; CAIERÃO, E.; DE MORI, C.; CUNHA, G. R. da; SANTOS, H. P. dos; DALMAGO, G. A.; MARSARO JÚNIOR, A. L.; PEREIRA, P. R. V. da S.; COSTAMILAN, L. M.; SILVA JUNIOR, J. P. da; FAE, G. S.; MELLO, L. G. de; BRISTOT, M.; STECCA, J.; SANTOS, J. L. M. dos. Avaliação de sistemas de sucessão trigo-soja em Passo Fundo/RS. In: REUNIÃO DA COMISSÃO BRASILEIRA DE PESQUISA DE TRIGO E TRITICALE, 8.; SEMINÁRIO TÉCNICO DO TRIGO, 9., 2014, Canela; REUNIÃO DA COMISSÃO BRASILEIRA DE PESQUISA DE TRIGO E TRITICALE, 9.; SEMINÁRIO TÉCNICO DO TRIGO, 10., 2015, Passo Fundo. Anais... Passo Fundo: Biotrigo Genética: Embrapa Trigo, 2015. 2015 - Ecologia, Fisiologia e Práticas Culturais - Trabalho 155. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Trigo. |
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| Registros recuperados : 7 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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