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Dynamic Simulation of Cyclic Voltammogram on the Electrochemical Reduction of VO2+ Ions
Korean Journal of Chemical Engineering, November 1997, 14(6), 521-527(7), 10.1007/BF02706604
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Abstract
An electrochemical reduction of VO2+ ions in a formic acid electrolyte was analyzed by cyclic voltammetry. A new four step reaction mechanism, EECE, was proposed to derive the mass transfer equation, and then it was solved by numerical method, which enabled us to obtain theoretical cyclic voltammograms. Kinetic parameters such as diffusion coefficients, rate constants and transfer coefficients, describing the VO2+ ion reduction system, were estimated by fitting the theoretical curve with the experimental data. The parameters obtained were then evaluated on their extended applicability in various concentrations and scan rates. It was shown that the theoretical voltammograms obtained using the above parameters fitted well with the experimental curves for the scan rate variation from 2 to 20 V/sec, while the deviation increased in proportion to the VO2+ ion concentration.
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References
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Jung KS, "Studies on the Electrode Reaction of Polyamino-carboxylate Complexes of Vanadium and Uranium at Mercury Electrode in Aqueous Solution," Ph.D. Thesis, Dept. Chem., Chungnam National Univ. (1989)
Lingane JJ, J. Am. Chem. Soc., 67, 182 (1945)
Lingane JJ, Meites L, J. Am. Chem. Soc., 70, 2525 (1948)
Nicholson RS, Shain I, Anal. Chem., 36, 706 (1964)
Nicholson RS, Shain I, Anal. Chem., 37, 178 (1965)
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Polcyn DS, Shain I, Anal. Chem., 38, 376 (1966)
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Wood CJ, "Reformulation of the LOMI Chemical Decontamination Reagent," EPRI NP-7276 (1991)
