Fast scan linear sweep voltammetry at a high-speed wall-tube electrode
The application of fast-scan linear sweep voltammetry methods to a high-speed wall-tube electrode (HWTE) is reported. Experiments are reported for the oxidation of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) in propylene carbonate solution containing 0.10 M tetrabutylammonium perchlorate for a 2...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2003
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| _version_ | 1826303318955130880 |
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| author | Rees, N Klymenko, O Coles, B Compton, R |
| author_facet | Rees, N Klymenko, O Coles, B Compton, R |
| author_sort | Rees, N |
| collection | OXFORD |
| description | The application of fast-scan linear sweep voltammetry methods to a high-speed wall-tube electrode (HWTE) is reported. Experiments are reported for the oxidation of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) in propylene carbonate solution containing 0.10 M tetrabutylammonium perchlorate for a 24 μm radius platinum microdisk electrode housed within the HWTE using a range of scan rates from 200 to 3000 V s-1 and average flow jet velocities from 0.24 to 9.4 m s-1 (corresponding to volume flow rates of 0.003-0.12 cm3 s-1, and centre-line jet velocities from 0.5 to 18.9 m s-1). Linear sweep voltammograms (LSVs) are analysed for a simple electron transfer under high volume flow rates, by curve fitting. Analysis of the transient LSVs yielded values for k0, α, and Ef0 for TMPD of (5.9±2.4)×10-2 cm s-1, 0.46±0.08 and 0.217±0.019 V (vs. Ag), respectively. This is in good agreement with independent experiments conducted using the high-speed channel electrode which yielded the results: k0=(6.3±0.4)×10-2 cm s-1, α=0.52±0.01, and Ef0=0.234±0.005 V (vs. Ag). The range of applicability of this method for measuring k0 was also investigated and compared with existing channel electrode techniques. © 2003 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-07T06:00:52Z |
| format | Journal article |
| id | oxford-uuid:ec243b5b-043a-4114-b939-fc57c0129abd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:00:52Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | oxford-uuid:ec243b5b-043a-4114-b939-fc57c0129abd2022-03-27T11:15:11ZFast scan linear sweep voltammetry at a high-speed wall-tube electrodeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ec243b5b-043a-4114-b939-fc57c0129abdEnglishSymplectic Elements at Oxford2003Rees, NKlymenko, OColes, BCompton, RThe application of fast-scan linear sweep voltammetry methods to a high-speed wall-tube electrode (HWTE) is reported. Experiments are reported for the oxidation of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) in propylene carbonate solution containing 0.10 M tetrabutylammonium perchlorate for a 24 μm radius platinum microdisk electrode housed within the HWTE using a range of scan rates from 200 to 3000 V s-1 and average flow jet velocities from 0.24 to 9.4 m s-1 (corresponding to volume flow rates of 0.003-0.12 cm3 s-1, and centre-line jet velocities from 0.5 to 18.9 m s-1). Linear sweep voltammograms (LSVs) are analysed for a simple electron transfer under high volume flow rates, by curve fitting. Analysis of the transient LSVs yielded values for k0, α, and Ef0 for TMPD of (5.9±2.4)×10-2 cm s-1, 0.46±0.08 and 0.217±0.019 V (vs. Ag), respectively. This is in good agreement with independent experiments conducted using the high-speed channel electrode which yielded the results: k0=(6.3±0.4)×10-2 cm s-1, α=0.52±0.01, and Ef0=0.234±0.005 V (vs. Ag). The range of applicability of this method for measuring k0 was also investigated and compared with existing channel electrode techniques. © 2003 Elsevier B.V. All rights reserved. |
| spellingShingle | Rees, N Klymenko, O Coles, B Compton, R Fast scan linear sweep voltammetry at a high-speed wall-tube electrode |
| title | Fast scan linear sweep voltammetry at a high-speed wall-tube electrode |
| title_full | Fast scan linear sweep voltammetry at a high-speed wall-tube electrode |
| title_fullStr | Fast scan linear sweep voltammetry at a high-speed wall-tube electrode |
| title_full_unstemmed | Fast scan linear sweep voltammetry at a high-speed wall-tube electrode |
| title_short | Fast scan linear sweep voltammetry at a high-speed wall-tube electrode |
| title_sort | fast scan linear sweep voltammetry at a high speed wall tube electrode |
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