Jk. Moon et al., DYNAMIC SIMULATION OF CYCLIC VOLTAMMOGRAM ON THE ELECTROCHEMICAL REDUCTION OF VO2+ IONS, The Korean journal of chemical engineering, 14(6), 1997, pp. 521-527
An electrochemical reduction of VO2+ ions in a formic acid electrolyte
was analyzed by cyclic voltammetry. A new four step reaction mechanis
m, EECE, was proposed to derive the mass transfer equation, and then i
t was solved by numerical method, which enabled us to obtain theoretic
al cyclic voltammograms. Kinetic parameters such as diffusion coeffici
ents, rate constants and transfer coefficients, describing the VO2+ io
n reduction system, were estimated by fitting the theoretical curve wi
th the experimental data. The parameters obtained were then evaluated
on their extended applicability in various concentrations and scan rat
es. It was shown that the theoretical voltammograms obtained using the
above parameters fitted well with the experimental curves for the sca
n rate variation from 2 to 20 V/sec, while the deviation increased in
proportion to the VO2+ ion concentration.