Voltammetry and Impedance of Pt(111) Electrodes in Aqueous KClO4 Solutions

Tamás Pajkossy

Abstract

The voltammetric behaviour of Pt(111) electrodes in neutral and near-neutral aqueous KClO4 solutions (4 < pH < 9.7) is discussed. In this system, within the ideally polarizable potential region, the only processes affecting voltammetry and impedance are the adsorption and desorption of the H+ and OH ions. Due to the low bulk concentrations of these ions, the desad processes are diffusion controlled. This situation is analysed using cyclic voltammetry, transient and impedance measurements.

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Founded in 1887, the Zeitschrift für Physikalische Chemie covers the main developments in physical chemistry, placing with an emphasis on experimental research. It represents a combination ofdiscusses reaction kinetics and spectroscopy, surface research and electrochemistry, thermodynamics and the structure analysis of matter in its various conditions, among other topics.

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