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Fast scan linear sweep voltammetry at a high-speed wall-tube electrode

Rees, NV, Klymenko, OV, Coles, BA and Compton, RG (2003) Fast scan linear sweep voltammetry at a high-speed wall-tube electrode Journal of Electroanalytical Chemistry, 557. pp. 99-107.

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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.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Rees, NV
Coles, BA
Compton, RG
Date : 15 October 2003
DOI : 10.1016/S0022-0728(03)00352-8
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:57
Last Modified : 25 Jan 2020 00:33

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