Abstract
Summary o 1. A technique has been developed for the application of the methods of time-domian reflectometry to measurements of electrode impedance in electrochemical systems. 2. The impedance has been measured at a platinum electrode in aqueous HClO 4 and H 2 SO 4 solutions. The capacitance is normally independent of time in the range 1–100 nsec except at the reversible hydrogen potential where the effect of the electrode reaction results in a time-dependent decrease of the electrode impedance at times >30 nsec. No detectable relaxation of the double layer occurs within the time range of the experiments.
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