Unusual impedance plot when the reference electrode is connected through capillary?

27 August 2024 0 9K Report

I have an electrochemical flow cell (1M KOH electrolyte) where the reference electrode is immersed in 1 M KOH and connected to the cathode via a Luggin capillary (about 50 cm length) opening behind the cathode. The cell impedance is as expected; however, the anode impedance spectrum appears unusual. See attached file.

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