Channel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solution
Theory is developed to account for the variation of the voltammetric half-wave potential with the rate of mass transport at a channel electrode for the case where an electrochemically reversible electron transfer is followed by the (partially) chemically reversible dimerisation of the electrode prod...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1997
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| _version_ | 1826262366930599936 |
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| author | Alden, J Cooper, J Hutchinson, F Prieto, F Compton, R |
| author_facet | Alden, J Cooper, J Hutchinson, F Prieto, F Compton, R |
| author_sort | Alden, J |
| collection | OXFORD |
| description | Theory is developed to account for the variation of the voltammetric half-wave potential with the rate of mass transport at a channel electrode for the case where an electrochemically reversible electron transfer is followed by the (partially) chemically reversible dimerisation of the electrode product. A working surface is presented which allows the analysis of experimental data and it is shown that when the homogeneous dimerisation kinetics are sufficiently rapid the half-wave potential becomes independent of the rate of mass transport but is shifted from the true formal potential. Experiments are reported on the reduction of the methyl viologen di-cation in aqueous solution. The resulting mono-cation is believed to undergo a reversible dimerisation forming a π-dimer, and the possibility of further aggregation is investigated. Measurements of the half-wave potential as a function of solution flow-rate and concentration are consistent with dimer formation and permit the inference of a value of -0.703 ± 0.003V (vs. SCE) for the one-electron reduction of the di-cation. © 1997 Elsevier Science S.A. |
| first_indexed | 2024-03-06T19:35:18Z |
| format | Journal article |
| id | oxford-uuid:1ed6a61a-27a6-49c9-9ab6-aaa525ed2394 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:35:18Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:1ed6a61a-27a6-49c9-9ab6-aaa525ed23942022-03-26T11:18:37ZChannel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solutionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1ed6a61a-27a6-49c9-9ab6-aaa525ed2394EnglishSymplectic Elements at Oxford1997Alden, JCooper, JHutchinson, FPrieto, FCompton, RTheory is developed to account for the variation of the voltammetric half-wave potential with the rate of mass transport at a channel electrode for the case where an electrochemically reversible electron transfer is followed by the (partially) chemically reversible dimerisation of the electrode product. A working surface is presented which allows the analysis of experimental data and it is shown that when the homogeneous dimerisation kinetics are sufficiently rapid the half-wave potential becomes independent of the rate of mass transport but is shifted from the true formal potential. Experiments are reported on the reduction of the methyl viologen di-cation in aqueous solution. The resulting mono-cation is believed to undergo a reversible dimerisation forming a π-dimer, and the possibility of further aggregation is investigated. Measurements of the half-wave potential as a function of solution flow-rate and concentration are consistent with dimer formation and permit the inference of a value of -0.703 ± 0.003V (vs. SCE) for the one-electron reduction of the di-cation. © 1997 Elsevier Science S.A. |
| spellingShingle | Alden, J Cooper, J Hutchinson, F Prieto, F Compton, R Channel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solution |
| title | Channel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solution |
| title_full | Channel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solution |
| title_fullStr | Channel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solution |
| title_full_unstemmed | Channel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solution |
| title_short | Channel electrode voltammetry and reversible electro-dimerisation processes. The reduction of the methyl viologen di-cation in aqueous solution |
| title_sort | channel electrode voltammetry and reversible electro dimerisation processes the reduction of the methyl viologen di cation in aqueous solution |
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