Characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes
The use of differential pulse voltammetry at spherical electrodes for the study of the kinetic of charge transfer processes is analyzed. An analytical solution is presented, valid for any value of the electrode radius, the heterogeneous rate constant and the transfer coefficient. Several reversibili...
| Principais autores: | , , , |
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| Formato: | Journal article |
| Idioma: | English |
| Publicado em: |
2010
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| _version_ | 1826264498226331648 |
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| author | Molina, A Martinez-Ortiz, F Laborda, E Compton, R |
| author_facet | Molina, A Martinez-Ortiz, F Laborda, E Compton, R |
| author_sort | Molina, A |
| collection | OXFORD |
| description | The use of differential pulse voltammetry at spherical electrodes for the study of the kinetic of charge transfer processes is analyzed. An analytical solution is presented, valid for any value of the electrode radius, the heterogeneous rate constant and the transfer coefficient. Several reversibility criteria are established based on the variation of DPV peak with the duration of the potential pulses and the electrode radius. Moreover, general working curves for extraction of kinetic parameters from DPV experiments are given. The anomalous shape of DPV curves for quasireversible processes with small values of the transfer coefficient is reported. The effect of the presence of both electroactive species on DPV curves for quasireversible and irreversible systems is also studied. © 2010 Elsevier Ltd. All rights reserved. |
| first_indexed | 2024-03-06T20:08:47Z |
| format | Journal article |
| id | oxford-uuid:29d2bbf8-2628-4212-a070-4bff42bb63cf |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:08:47Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:29d2bbf8-2628-4212-a070-4bff42bb63cf2022-03-26T12:21:26ZCharacterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:29d2bbf8-2628-4212-a070-4bff42bb63cfEnglishSymplectic Elements at Oxford2010Molina, AMartinez-Ortiz, FLaborda, ECompton, RThe use of differential pulse voltammetry at spherical electrodes for the study of the kinetic of charge transfer processes is analyzed. An analytical solution is presented, valid for any value of the electrode radius, the heterogeneous rate constant and the transfer coefficient. Several reversibility criteria are established based on the variation of DPV peak with the duration of the potential pulses and the electrode radius. Moreover, general working curves for extraction of kinetic parameters from DPV experiments are given. The anomalous shape of DPV curves for quasireversible processes with small values of the transfer coefficient is reported. The effect of the presence of both electroactive species on DPV curves for quasireversible and irreversible systems is also studied. © 2010 Elsevier Ltd. All rights reserved. |
| spellingShingle | Molina, A Martinez-Ortiz, F Laborda, E Compton, R Characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes |
| title | Characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes |
| title_full | Characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes |
| title_fullStr | Characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes |
| title_full_unstemmed | Characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes |
| title_short | Characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes |
| title_sort | characterization of slow charge transfer processes in differential pulse voltammetry at spherical electrodes and microelectrodes |
| work_keys_str_mv | AT molinaa characterizationofslowchargetransferprocessesindifferentialpulsevoltammetryatsphericalelectrodesandmicroelectrodes AT martinezortizf characterizationofslowchargetransferprocessesindifferentialpulsevoltammetryatsphericalelectrodesandmicroelectrodes AT labordae characterizationofslowchargetransferprocessesindifferentialpulsevoltammetryatsphericalelectrodesandmicroelectrodes AT comptonr characterizationofslowchargetransferprocessesindifferentialpulsevoltammetryatsphericalelectrodesandmicroelectrodes |