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Published on: May 9, 2021
Electrochemical bursting oscillations on a high-dimensional slow subsystem
István Z Kiss1, Qing Lv, Levent Organ
1Department of Chemical Engineering, University of Virginia, 102 Engineers' Way, 22904-4741, Charlottesville, Virginia, USA.
Physical Chemistry Chemical Physics : PCCP
|June 10, 2006
Summary
This study explores chaotic dynamics in iron electrodissolution, finding that parameter changes can regularize bursting oscillations. Perturbing circuit potential allows control over fast spiking and slow oscillation timescales.
Area of Science:
- Electrochemistry
- Nonlinear Dynamics
- Chemical Systems
Background:
- The electrodissolution of iron in sulfuric acid exhibits complex bursting oscillations.
- These oscillations involve fast spiking superimposed on slow chaotic dynamics.
Purpose of the Study:
- To investigate the regularization of slow dynamics in a chemical burster system.
- To understand transitions from chaotic to periodic bursting oscillations by altering experimental parameters.
- To analyze changes in fast spiking dynamics during these transitions.
Main Methods:
- Experimental manipulation of circuit potential, external resistance, and electrode diameter.
- Observation and analysis of bursting oscillation patterns.
- Characterization of fast spiking dynamics (Hopf-Hopf, homoclinic-Hopf).
Main Results:
- Regularization of slow dynamics was achieved by modifying experimental parameters.
- Transitions from chaotic to periodic bursting oscillations were observed.
- Fast spiking dynamics shifted from 'Hopf-Hopf' to 'homoclinic-Hopf' patterns.
- Periodic bursting was eventually destroyed via period lengthening.
Conclusions:
- Experimental parameters can control the transition from chaotic to periodic bursting in iron electrodissolution.
- Fast spiking dynamics are intrinsically linked to the slow oscillation behavior.
- Periodic perturbation of circuit potential offers a method to control oscillation timescales.
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