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Voltammetry under a Controlled Temperature Gradient

Electrochemical measurements are generally done under isothermal conditions. Here we report on the application of a controlled temperature gradient between the working electrode surface and the solution. Using electrochemical sensors prepared on ceramic materials with extremely high specific heat co...

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Detalles Bibliográficos
Autores principales: Krejci, Jan, Sajdlova, Zuzana, Marvanek, Tomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231144/
https://www.ncbi.nlm.nih.gov/pubmed/22163578
http://dx.doi.org/10.3390/s100706821
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author Krejci, Jan
Sajdlova, Zuzana
Krejci, Jan
Marvanek, Tomas
author_facet Krejci, Jan
Sajdlova, Zuzana
Krejci, Jan
Marvanek, Tomas
author_sort Krejci, Jan
collection PubMed
description Electrochemical measurements are generally done under isothermal conditions. Here we report on the application of a controlled temperature gradient between the working electrode surface and the solution. Using electrochemical sensors prepared on ceramic materials with extremely high specific heat conductivity, the temperature gradient between the electrode and solution was applied here as a second driving force. This application of the Soret phenomenon increases the mass transfer in the Nernst layer and enables more accurate control of the electrode response enhancement by a combination of diffusion and thermal diffusion. We have thus studied the effect of Soret phenomenon by cyclic voltammetry measurements in ferro/ferricyanide. The time dependence of sensor response disappears when applying the Soret phenomenon, and the complicated shape of the cyclic voltammogram is replaced by a simple exponential curve. We have derived the Cotrell-Soret equation describing the steady-state response with an applied temperature difference.
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spelling pubmed-32311442011-12-07 Voltammetry under a Controlled Temperature Gradient Krejci, Jan Sajdlova, Zuzana Krejci, Jan Marvanek, Tomas Sensors (Basel) Article Electrochemical measurements are generally done under isothermal conditions. Here we report on the application of a controlled temperature gradient between the working electrode surface and the solution. Using electrochemical sensors prepared on ceramic materials with extremely high specific heat conductivity, the temperature gradient between the electrode and solution was applied here as a second driving force. This application of the Soret phenomenon increases the mass transfer in the Nernst layer and enables more accurate control of the electrode response enhancement by a combination of diffusion and thermal diffusion. We have thus studied the effect of Soret phenomenon by cyclic voltammetry measurements in ferro/ferricyanide. The time dependence of sensor response disappears when applying the Soret phenomenon, and the complicated shape of the cyclic voltammogram is replaced by a simple exponential curve. We have derived the Cotrell-Soret equation describing the steady-state response with an applied temperature difference. Molecular Diversity Preservation International (MDPI) 2010-07-14 /pmc/articles/PMC3231144/ /pubmed/22163578 http://dx.doi.org/10.3390/s100706821 Text en © 2010 by the authors licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Krejci, Jan
Sajdlova, Zuzana
Krejci, Jan
Marvanek, Tomas
Voltammetry under a Controlled Temperature Gradient
title Voltammetry under a Controlled Temperature Gradient
title_full Voltammetry under a Controlled Temperature Gradient
title_fullStr Voltammetry under a Controlled Temperature Gradient
title_full_unstemmed Voltammetry under a Controlled Temperature Gradient
title_short Voltammetry under a Controlled Temperature Gradient
title_sort voltammetry under a controlled temperature gradient
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231144/
https://www.ncbi.nlm.nih.gov/pubmed/22163578
http://dx.doi.org/10.3390/s100706821
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