Diffusion-migration currents on microelectrodes in the absence of supporting electrolyte at an arbitrary charge of ionsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Limiting diffusion-migration currents on microelectrodes in systems comprising two types of electroactive ions and one type of inactive ions with arbitrary charges (zj) and diffusion coefficients (Dj) are calculated. The electric field which induces the ion migration disappears when the condition D1ν2/D2ν1 = z1/z2 is fulfilled for two types of electroactive ions, where νj are their stoichiometric coefficients in the electrode reaction. For a reversible [Fe(CN)6]3-/4- system on microelectrodes, the migration effects are more pronounced as compared with the convective reactant delivery, which is explained by the different nature of the dependence of the limiting current on the diffusion coefficient.