Limiting diffusion currents in hydrodynamic voltammetry: Part IV. Stationary disk and ring electrodes in a rotational flow produced by a rotating disk |
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Authors: | Sumio Hamada Makoto Itoh Hiroaki Matsuda Joseph Yamada |
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Institution: | 1. Department of Electronic Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo (Japan);2. National Chemical Laboratory for Industry, Hon-machi, Shibuya-ku, Tokyo (Japan) |
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Abstract: | A new electrolysis cell for the use in hydrodynamic voltammetry is devised, in which a stationary disk or ring electrode is immersed coaxially in a rotational flow produced by a uniformly rotating disk (rotor) and works as an indicator electrode. Theoretical equations of the limiting diffusion currents at such a disk or ring electrode are derived. The theoretical predictions for the dependence of the limiting diffusion current upon various experimental variables, i.e., the rotation speed of the rotor, the bulk concentration of depolarizer, the geometrical parameter of the electrode and the viscosity of the solution, are verified experimentally for the reduction of ferricyanide ions. |
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Keywords: | To whom correspondence should be addressed |
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