Journal of Electroanalytical Chemistry 2018-04-04

Conditions for a nearly perfect match between pulse voltammetry and linear scan voltammetry

Nicolas Fatouros, Denise Krulic

Index: 10.1016/j.jelechem.2018.04.004

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Abstract

It is formally shown that linear scan voltammetry for a reversible charge-transfer on redox and metal/metal-ion electrodes can be approximated with great precision using the forward individual current in differential pulse voltammetry with a ratio of 0.4 between the pulse duration and the period of the waveform. For redox electrodes the same is also possible using the forward current in square wave voltammetry. In each case, there is coincidence with the linear scan voltammogram for a constant pulse-to-step height ratio. The relevance of this new approach is discussed and an experimental application with the Ti(IV)/Ti(III) couple in 0.25 M H2C2O4 solution at the mercury drop electrode is presented.