Characterization of the Capacitance of a Rotating Ring–Disk Electrode
Publisher DOI
Abstract
The use of rotating ring–disk electrodes as generator-collector systems has so far been limited to the detection of Faradaic currents at the ring. As opposed to other generator-collector configurations, non-Faradaic detection has not yet been carried out with rotating ring–disk electrodes. In this study, a.c. perturbation based detection for measurement of the ring impedance is introduced. By using a conducting polymer-modified disk electrode in combination with a bare gold ring as a model, it is shown that the measured ring capacitance correlates with the polarization of the polymer film, most probably due to counter-ion exchange. A method of calculating the ring capacitance based on a small-signal sinusoid perturbation is described and the most important instrumental limitations are identified.
Date Issued
2015-11-02
Publication Type
Article
Language(s)
en
Author(s)
Kovács, Noémi | |
Ujvári, Mária | |
Láng, Győző G. |
Additional Credits
Journal
Instrumentation Science and Technology
Publisher
Taylor & Francis
ISSN
1073-9149
Access(Rights)
metadata.only