Altering oscillatory dynamics of an electrochemical system using external forcing

Control of Electrochemical Chaos and Unstable Steady-States

“…P2), and (P1 ! P3) [28,29]. One should emphasize that, as other discussed here strategies, acquiring the control of the system's dynamics did not require prior knowledge of the reaction mechanism.…”

“…Such method of control is of non-feedback type, since the perturbation does not depend on the actual system's state and thus it is an approach based on principle alternative to OGY and analogous algorithms of controlling chaos. In electrochemistry, the application of sinusoidal forcing was described in terms of both numerical model and experimental studies by Parmananda et al [28,29]. The modulation of the control parameter p 1 , e.g., the potential of metallic anode, is described with the following dependence:…”

“…Experimental studies exhibited all theoretically ; o = 0.005 rad s -1 . Reprinted from [28]. Copyright 1999, with permission from Elsevier .…”

“…Copyright 1999, with permission from Elsevier . Reprinted from [28]. Copyright 1999, with permission from Elsevier predicted transitions: (chaos !…”

Oscillatory Phenomena as a Probe to Study Pitting Corrosion of Iron in Halide-Containing Sulfuric Acid Solutions

“…Among them, is that progress in the theory of nonlinear dynamical systems, achieved in parallel over last decades, has led to the formulation of new theoretical concepts and tools that could apply to electrochemical oscillators. Therefore, an understanding of the fundamental principles underlying the nonlinear phenomena observed in electrochemical processes has been considerably improved (Berthier et al, 2004;Eiswirth et al, 1992;Karantonis & Pagitsas, 1997;Karantonis et al, 2005;Karantonis et al, 2000;Kiss et al, 2006;Krischer, 2003b;Parmananda et al, 1999;Parmananda et al, 2000;Sazou et al, 1993a). On the other hand, electrochemical systems can be readily controlled through the variation of the potential (under current-controlled conditions) or the current (under potential-controlled conditions) and have served as experimental model systems to implement and test new theoretical concepts.…”