Admittance measurements in dilute solutions: Re-examination of double-layer effects on the electrode reaction of Zn2+/Zn(Hg) In a large concentration range of the supporting electrolyte |
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| Authors: | S Vavřička J Kuta L Pospišil |
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| Institution: | Department of Physical Chemistry, Charles University, Albertou 2030, 128 40 Prague 2 Czechoslovakia;The J. Heyrovsky Institute of Physical Chemistry and Electrochemistry, Vla?ská 9, 118 40 Prague 1 Czechoslovakia |
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| Abstract: | A procedure is proposed enabling corrections to be made of the measured admittance components for the resistance uncompensated by the positive feedback, and so to determine the charge-transfer rate constants in dilute solutions of supporting electrolytes. The procedure was checked for the Zn2+/Zn(Hg) redox system in NaNO3 up to 10?2M. A large increase of the measured rate constants with the dilution of the supporting electrolyte was found, obeying the Frumkin double-layer correction. |
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