Modeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wire
Microelectrode wires heated directly in situ by an electric current generate mass as well as heat energy transport phenomena. With continuous heating, a stationary surface temperature is established as a result of thermally promoted convection. The geometry of concentration and temperature profiles...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2000
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| _version_ | 1797092888392237056 |
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| author | Beckmann, A Coles, B Compton, R Grundler, P Marken, F Neudeck, A |
| author_facet | Beckmann, A Coles, B Compton, R Grundler, P Marken, F Neudeck, A |
| author_sort | Beckmann, A |
| collection | OXFORD |
| description | Microelectrode wires heated directly in situ by an electric current generate mass as well as heat energy transport phenomena. With continuous heating, a stationary surface temperature is established as a result of thermally promoted convection. The geometry of concentration and temperature profiles under these conditions are investigated by cyclic voltammetry, potential step experiments, and finite element simulation of convection and diffusion processes. It is shown that the Nernst diffusion layer approaches a constant, temperature-independent thickness if the temperature difference between bulk and electrode surface exceeds ca. 30 K in aqueous solution. At continuously heated wire electrodes, diffusion coefficient values as well as kinetic data can be determined under well-defined temperature conditions, and in a very convenient way. |
| first_indexed | 2024-03-07T03:52:27Z |
| format | Journal article |
| id | oxford-uuid:c1bbacbf-e401-416b-a5a1-4a0df05b24ec |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:52:27Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:c1bbacbf-e401-416b-a5a1-4a0df05b24ec2022-03-27T06:03:42ZModeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wireJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c1bbacbf-e401-416b-a5a1-4a0df05b24ecEnglishSymplectic Elements at Oxford2000Beckmann, AColes, BCompton, RGrundler, PMarken, FNeudeck, AMicroelectrode wires heated directly in situ by an electric current generate mass as well as heat energy transport phenomena. With continuous heating, a stationary surface temperature is established as a result of thermally promoted convection. The geometry of concentration and temperature profiles under these conditions are investigated by cyclic voltammetry, potential step experiments, and finite element simulation of convection and diffusion processes. It is shown that the Nernst diffusion layer approaches a constant, temperature-independent thickness if the temperature difference between bulk and electrode surface exceeds ca. 30 K in aqueous solution. At continuously heated wire electrodes, diffusion coefficient values as well as kinetic data can be determined under well-defined temperature conditions, and in a very convenient way. |
| spellingShingle | Beckmann, A Coles, B Compton, R Grundler, P Marken, F Neudeck, A Modeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wire |
| title | Modeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wire |
| title_full | Modeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wire |
| title_fullStr | Modeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wire |
| title_full_unstemmed | Modeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wire |
| title_short | Modeling hot wire electrochemistry. Coupled heat and mass transport at a directly and continuously heated wire |
| title_sort | modeling hot wire electrochemistry coupled heat and mass transport at a directly and continuously heated wire |
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