| Abstract
| - The voltammetric behavior of the [Fe(CN)6]3-/4- couple at a glassy carbon rotating macrodisk electrode withoutadded supporting electrolyte is shown to be in close to ideal agreement with the theory presented over a widerange of electrode rotation and scan rates when the concentration of electroactive species used is 50 mM.The influences of migration, uncompensated resistance, heterogeneous charge-transfer kinetics, and inhomogeneous diffusion are shown to be well modeled by a finite difference simulation scheme that affords excellentagreement between experiment and theory. The use of the rotating disk electrode, even when only moderaterotation rates are employed, is shown to eliminate the problem with natural convection that exists when usingstationary electrodes (macro- or microdisk) and that is enhanced in the absence of added supporting electrolyte.Consequently, it has been concluded that the rotating disk electrode method represents an almost ideal techniquefor conducting studies without added supporting electrolyte.
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