The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform

Richard G. Compton - One of the best experts on this subject based on the ideXlab platform.

  • Solution of ring electrode problems in spherical coordinates: An application to near-steady-state Linear Sweep Voltammetry
    Russian Journal of Electrochemistry, 2003
    Co-Authors: Irina Svir, Alexander Oleinick, Richard G. Compton
    Abstract:

    We report on the simulation of ring electrode problems in spherical coordinates and apply it to the problem of near-steady-state Linear Sweep Voltammetry at a ring electrode. The results are compared with those given by traditional methods.

  • Fast scan Linear Sweep Voltammetry at a high-speed wall-tube electrode
    Journal of Electroanalytical Chemistry, 2003
    Co-Authors: Neil V. Rees, Oleksiy V. Klymenko, Barry A. Coles, Richard G. Compton
    Abstract:

    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.

  • finite element simulation of electrochemically reversible quasi reversible and irreversible Linear Sweep Voltammetry at the wall tube electrode
    Journal of Electroanalytical Chemistry, 2002
    Co-Authors: Oleksiy V. Klymenko, David J. Gavaghan, Kathryn Harriman, Richard G. Compton
    Abstract:

    Abstract A finite element approach for numerical simulation of Linear Sweep Voltammetry at the wall tube electrode is presented. Working curves and surfaces are computed and reported which permit the analysis of reversible, quasi-reversible and irreversible voltammograms for all voltage scan rates.

  • Finite element simulation of electrochemically reversible‚ quasi−reversible and irreversible Linear Sweep Voltammetry at the wall tube electrode
    Journal of Electroanalytical Chemistry, 2002
    Co-Authors: Oleksiy V. Klymenko, David J. Gavaghan, Kathryn Harriman, Richard G. Compton
    Abstract:

    Abstract A finite element approach for numerical simulation of Linear Sweep Voltammetry at the wall tube electrode is presented. Working curves and surfaces are computed and reported which permit the analysis of reversible, quasi-reversible and irreversible voltammograms for all voltage scan rates.

  • Wall-jet electrode Linear Sweep Voltammetry
    The Journal of Physical Chemistry, 1992
    Co-Authors: Richard G. Compton, Adrian C. Fisher, Mark H. Latham, Christopher M.a. Brett, Ana Maria Oliveira Brett
    Abstract:

    Theory is presented which predicts the Linear Sweep Voltammetry behavior at the wall-jet electrode for a reversible couple. The scan rate and electrode geometry dependences are established, and hence the requirements for the measurement of true «steady state» hydrodynamic voltammograms are defined. Theory is found to be in good agreement with experiments conducted on the oxidation of the ferrocyanide anion in aqueous solution

Ole Østerby - One of the best experts on this subject based on the ideXlab platform.

  • use of the saul yev method for the digital simulation of chronoamperometry and Linear Sweep Voltammetry at the ultramicrodisk electrode
    Electrochimica Acta, 2017
    Co-Authors: Dieter Britz, Jörg Strutwolf, Ole Østerby
    Abstract:

    Abstract The two-dimensional Saul’yev method of simulating processes at an ultramicrodisk electrode is compared with the fully implicit backward differentiation method started with a few backward implicit steps, and an alternating direction implicit method. 2D Saul’yev is convenient to program and although it is significantly slower in execution than the other two methods, it still executes in reasonable time, and yields equally good results with a suitable choice of discrete intervals, and despite its inherent propagation problem, and a certain restriction in the relationship of the spatial and temporal intervals. Saul’yev was implemented for the diffusion limited potential step experiment, as well as Linear Sweep Voltammetry for a reversible system.

  • Use of the Saul’yev method for the digital simulation of chronoamperometry and Linear Sweep Voltammetry at the ultramicrodisk electrode
    Electrochimica Acta, 2017
    Co-Authors: Dieter Britz, Jörg Strutwolf, Ole Østerby
    Abstract:

    Abstract The two-dimensional Saul’yev method of simulating processes at an ultramicrodisk electrode is compared with the fully implicit backward differentiation method started with a few backward implicit steps, and an alternating direction implicit method. 2D Saul’yev is convenient to program and although it is significantly slower in execution than the other two methods, it still executes in reasonable time, and yields equally good results with a suitable choice of discrete intervals, and despite its inherent propagation problem, and a certain restriction in the relationship of the spatial and temporal intervals. Saul’yev was implemented for the diffusion limited potential step experiment, as well as Linear Sweep Voltammetry for a reversible system.

Oleksiy V. Klymenko - One of the best experts on this subject based on the ideXlab platform.

  • Fast scan Linear Sweep Voltammetry at a high-speed wall-tube electrode
    Journal of Electroanalytical Chemistry, 2003
    Co-Authors: Neil V. Rees, Oleksiy V. Klymenko, Barry A. Coles, Richard G. Compton
    Abstract:

    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.

  • finite element simulation of electrochemically reversible quasi reversible and irreversible Linear Sweep Voltammetry at the wall tube electrode
    Journal of Electroanalytical Chemistry, 2002
    Co-Authors: Oleksiy V. Klymenko, David J. Gavaghan, Kathryn Harriman, Richard G. Compton
    Abstract:

    Abstract A finite element approach for numerical simulation of Linear Sweep Voltammetry at the wall tube electrode is presented. Working curves and surfaces are computed and reported which permit the analysis of reversible, quasi-reversible and irreversible voltammograms for all voltage scan rates.

  • Finite element simulation of electrochemically reversible‚ quasi−reversible and irreversible Linear Sweep Voltammetry at the wall tube electrode
    Journal of Electroanalytical Chemistry, 2002
    Co-Authors: Oleksiy V. Klymenko, David J. Gavaghan, Kathryn Harriman, Richard G. Compton
    Abstract:

    Abstract A finite element approach for numerical simulation of Linear Sweep Voltammetry at the wall tube electrode is presented. Working curves and surfaces are computed and reported which permit the analysis of reversible, quasi-reversible and irreversible voltammograms for all voltage scan rates.

Dieter Britz - One of the best experts on this subject based on the ideXlab platform.

  • use of the saul yev method for the digital simulation of chronoamperometry and Linear Sweep Voltammetry at the ultramicrodisk electrode
    Electrochimica Acta, 2017
    Co-Authors: Dieter Britz, Jörg Strutwolf, Ole Østerby
    Abstract:

    Abstract The two-dimensional Saul’yev method of simulating processes at an ultramicrodisk electrode is compared with the fully implicit backward differentiation method started with a few backward implicit steps, and an alternating direction implicit method. 2D Saul’yev is convenient to program and although it is significantly slower in execution than the other two methods, it still executes in reasonable time, and yields equally good results with a suitable choice of discrete intervals, and despite its inherent propagation problem, and a certain restriction in the relationship of the spatial and temporal intervals. Saul’yev was implemented for the diffusion limited potential step experiment, as well as Linear Sweep Voltammetry for a reversible system.

  • Use of the Saul’yev method for the digital simulation of chronoamperometry and Linear Sweep Voltammetry at the ultramicrodisk electrode
    Electrochimica Acta, 2017
    Co-Authors: Dieter Britz, Jörg Strutwolf, Ole Østerby
    Abstract:

    Abstract The two-dimensional Saul’yev method of simulating processes at an ultramicrodisk electrode is compared with the fully implicit backward differentiation method started with a few backward implicit steps, and an alternating direction implicit method. 2D Saul’yev is convenient to program and although it is significantly slower in execution than the other two methods, it still executes in reasonable time, and yields equally good results with a suitable choice of discrete intervals, and despite its inherent propagation problem, and a certain restriction in the relationship of the spatial and temporal intervals. Saul’yev was implemented for the diffusion limited potential step experiment, as well as Linear Sweep Voltammetry for a reversible system.

Kathryn Harriman - One of the best experts on this subject based on the ideXlab platform.