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Impedance measurement errors due to non-linearities—I. Low frequency impedance measurements

✍ Scribed by J.-P. Diard; B. Le Gorrec; C. Montella

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
679 KB
Volume
39
Category
Article
ISSN
0013-4686

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✦ Synopsis

The effects of electrochemical systems non-linearities on impedance measurements with a Frequency Response Analyser have been investigated in low frequency domain from both a theoretical and experimental viewpoint. A theoretical expression for the polarization resistance measurement error has been found for "non-blocking" electrodes and the measurement validity conditions have been examined. The theoretical approach has been applied to redox reactions and to an adsorbed phase reaction which is a dissolution-passivation process of a metal. The theoretical results were verified with impedance measurements on a platinum rotating disk electrode in a Fe(CN):-/Fe(CN):-redox solution.

📜 SIMILAR VOLUMES

Very low frequency (down to 3 × 10−3 Hz)
Very low frequency (down to 3 × 10−3 Hz) impedance measurements on a hanging mercury drop electrode
✍ Chantal Cachet; Hubert Cachet; Jean-Claude Lestrade 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 240 KB

The authors describe an experimental set-up. using transfer function analyscrs, which allows for the impedauce of a hanging mercury drop electrode to be measured at frequencies as low as 3 x I Om 3 Hz, and for the low frequency limit of that impedance to be compared with the slope of the currentvolt