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Mechanistic Analysis of Electrochemical Oscillators Using Derivative Feedback Control Techniques

MPS-Authors
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Strasser,  Peter
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Lübke,  Margot
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Parmananda,  Punit
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Eiswirth,  Markus
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Strasser, P., Lübke, M., Parmananda, P., Eiswirth, M., & Ertl, G. (1998). Mechanistic Analysis of Electrochemical Oscillators Using Derivative Feedback Control Techniques. The Journal of Physical Chemistry B, 102(17), 3227-3237. doi:10.1021/jp9801572.


Cite as: http://hdl.handle.net/21.11116/0000-0007-1166-3
Abstract
Derivative control was applied to electrochemical oscillators under potentiostatic as well as galvanostatic conditions; i.e., the time derivative of a measured quantity (such as the current or the concentration of an electrochemical species) is fed back to the externally applied voltage or, respectively, current. In particular cases the control led to stabilization of the unstable node, i.e., suppression of oscillations. By comparison with model calculations, it is shown that the result of the derivative control provides valuable information about the mechanism of an electrochemical oscillator and the role of certain species.