Translate 
Abstract
Reported is the first experimental implementation of Fourier transform hydrodynamic modulation voltammetry (FTHMV). Two different types of experiments are performed to illustrate the capabilities of the technique. First, the analytical utility of FTHMV is demonstrated by applying the technique to study the frequency response characteristics of mass‐transfer limited reduction of 2 mM ferric ion at a speed‐modulated rotating disk electrode. It is shown that FTHMV, performed using a square wave rotation rate modulation, is a fast and accurate method for characterizing the system's frequency response in a single experiment, and thus provides an excellent alternative to the common practice of performing many experiments one frequency at a time. The second application of FTHMV reported here is the analysis of nonlinearities in the mass‐transfer limited current to a rotating disk electrode modulated at a single frequency. We show that the magnitude of nonlinear harmonics induced by a sinusoidal rotation rate modulation has a power law form, where the nonlinear signal is proportional to the amplitude of the rotation rate modulation raised to the power of the harmonic component. Also discussed are the implications of time domain signal processing for improving the signal‐to‐noise performance of FTHMV.
Published Version
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
