Apparent transfer coefficients for ion transport between water and nitrobenzene

Autor:	William E. Bronner, Richard P. Buck, Owen R. Melroy
Rok vydání:	1984
Předmět:	Nitrobenzene chemistry.chemical_classification chemistry.chemical_compound Aqueous solution Tetraphenylborate chemistry Supporting electrolyte Iodide Inorganic chemistry Electrolyte Ion transporter Ion
Zdroj:	Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 162:263-274
ISSN:	0022-0728
DOI:	10.1016/s0022-0728(84)80169-2
Popis:	Transfers of tetra-n-butylammonium ions and iodide ions between water and nitrobenzene were observed chronopotentiometrically. Transfer coefficients for these ions were measured as functions of current density and electrolyte concentrations. The observed ion transfer coefficients in both cases were strongly dependent upon current density and non-aqueous supporting electrolyte concentration, but comparatively independent of concentrations of both aqueous supporting electrolyte and transferring ions. Causes of this behavior are discussed. The principal source of “induced” irreversibility is current-controlled formation of a resistive surface film of tetraphenylborate salt during ion transfer. The salt layer becomes visible at high concentrations and high currents, especially at times after the transition time when tetraphenylborate and sodium become the principal charge carriers.
Databáze:	OpenAIRE
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