Reversal and Cyclic Chronopotentiometry with Exponential Current-Time Functions at Spherical Electrodes. Reversibility Effects and Experimental Verification

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Title:Reversal and Cyclic Chronopotentiometry with Exponential Current-Time Functions at Spherical Electrodes. Reversibility Effects and Experimental Verification
Creators:
Molina, Ángela
González, Joaquín
Morales, Isabel
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 69, 11, pp. 1997-2020
Uncontrolled Keywords:Exponential current, Reversal chronopotentiometry, Cyclic chronopotentiometry, Electrochemistry, Analytical solution, Spherical electrodes

Abstract

General analytical solutions for the potential-time curves corresponding to a slow charge transfer reaction in reversal and cyclic chronopotentiometry with exponential current-time functions, <i>I</i>(<i>t</i>) = <i>I</i><sub>0</sub>e<i><sup>wt</sup></i>, have been deduced. For obtaining these equations, the superposition principle can be applied. Our results are valid for planar and spherical electrodes of any size. We have evaluated the effects of electrode sphericity and of the reversibility of the process on the potential-time curves. The analysis of the successive potential-time responses allows to obtain accurate values of the thermodynamic and kinetic parameters of the process under study as well as to detect any possible kinetic complication. The validity of the theoretical solutions has been experimentally tested with the iron(III) trioxalate complex in aqueous solutions. <p>

Title:Reversal and Cyclic Chronopotentiometry with Exponential Current-Time Functions at Spherical Electrodes. Reversibility Effects and Experimental Verification
Creators:
Molina, Ángela
González, Joaquín
Morales, Isabel
Uncontrolled Keywords:Exponential current, Reversal chronopotentiometry, Cyclic chronopotentiometry, Electrochemistry, Analytical solution, Spherical electrodes
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:69
Number:11
Page Range:pp. 1997-2020
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20041997UNSPECIFIED
ID Code:2316
Item Type:Article
Deposited On:06 Feb 2009 17:17
Last Modified:06 Feb 2009 16:17

Citation

Molina, Ángela; González, Joaquín; Morales, Isabel (2004) Reversal and Cyclic Chronopotentiometry with Exponential Current-Time Functions at Spherical Electrodes. Reversibility Effects and Experimental Verification. Collection of Czechoslovak Chemical Communications, 69 (11). pp. 1997-2020. ISSN 0010-0765

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