๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

On the impedance of galvanic cells: IV. Determination of rate constants of rapid electrode reactions from electrode impedance measurements

โœ Scribed by Miss M. Rehbach; J. H. Sluyters

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
209 KB
Volume
81
Category
Article
ISSN
0165-0513

No coin nor oath required. For personal study only.

โœฆ Synopsis

Abstract

If, at one particular frequency, the electrode impedance is plotted in the complex impedance plane at varying bulk concentrations C*ox and C*RED, keeping C*ox = C*RED, a circle is obtained. Moreover, through one of the points measured a semicircle can be drawn with its centre on the real axis.

From the coordinates of the centres of these circles information can be gained on the rate constant of the electrode reaction. The ohmic resistance, the double layer capacity, diffusion polarization and activation polarization may contribute to the impedance of the electrode.

The upper limit of the rate constant k~sh~ that can be measured by this method is valued at 0.65 cm sec^โˆ’1^.

๐Ÿ“œ SIMILAR VOLUMES

On the impedance of galvanic cells: V. T
On the impedance of galvanic cells: V. The impedance of a galvanic cell with two plane parallel electrodes at short distance
โœ J. H. Sluyters ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 276 KB

## Abstract It is shown both by calculation and experimentally that in a galvanic cell with two plane electrodes, through which an alternating current flows, the concentration waves interfere if the distance of the electrodes is of the order of a wave length.

On the impedance of galvanic cellsโ€”XVII.
On the impedance of galvanic cellsโ€”XVII. The mechanism of the Zn2+/Zn(Hg) electrode reaction
โœ M. Sluyters-Rehbach; A.B. Ijzermans; B. Timmer; J.B. Griffioen; J.H. Sluyters ๐Ÿ“‚ Article ๐Ÿ“… 1966 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 838 KB

A theory is presented of the complex behaviour of the streaming zinc amalgam electrode in a Zns+ solution. It is assumed that the Znp+/Zn+ and the Zn+/Zn(Hg) electrode reactions occur at potentials where at the dropping amalgam electrode the Zna+-resp. Zn-concentration at the electrode surface is vi