Diffusion–Migration Currents on Microelectrodes in the Absence of Supporting Electrolyte at an Arbitrary Charge of Ions

Autor:	Z. A. Rotenberg, B. B. Damaskin
Rok vydání:	2004
Předmět:	Microelectrode Chemical physics Supporting electrolyte Chemistry Electric field Diffusion Electrode Electrochemistry Limiting current Analytical chemistry Ion
Zdroj:	Russian Journal of Electrochemistry. 40:50-55
ISSN:	1023-1935
DOI:	10.1023/b:ruel.0000012074.54919.1a
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e94bcbf20fad4a2dba491ad3d6ef35c0 https://doi.org/10.1023/b:ruel.0000012074.54919.1a Zobrazit plný text záznamu Full text from SpringerLink