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Confined Spatio-Temporal Chaos During Metal Electrodissolution: Simulations
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Adrian Birzu
Published/Copyright:
September 25, 2009
The electrodissolution of metal electrodes exhibits often sustained oscillations of the current density. We study the spatio-temporal dynamics of a metal disk electrode embedded in an insulator in a cylindrical electrochemical cell with a ring-shaped CE in the oscillatory region. The chosen cell geometry introduces a strong radial parameter dependence into the system. For low conductivity the dynamics is spatio-temporally chaotic. A small aspect ratio of the cell supports 2-dimensional space-time chaos on the entire disk electrode. For larger aspect ratios and thus larger parameter gradients, however, we observe a ‘self-confinement’ of the turbulent dynamics to the central part of the disk electrode, the outer ring of the electrode exhibiting angularly uniform oscillations. It can be expected that the state of confined chaos is not restricted to electrochemical systems but can be established also in other dynamical systems by introducing an appropriate parameter gradient.
Keywords: Spatio-Temporal Chaos; Topological Defects; Electrochemical Systems; Electrodissolution; Numerical Simulations
Received: 2007-6-25
Accepted: 2007-7-23
Published Online: 2009-9-25
Published in Print: 2007-10-1
© Oldenbourg Wissenschaftsverlag
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Keywords for this article
Spatio-Temporal Chaos;
Topological Defects;
Electrochemical Systems;
Electrodissolution;
Numerical Simulations
Articles in the same Issue
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- Precursor Adsorption of SbBr3 on Au(111) and Au(100) for Antimony Underpotential Deposition in a BMIBF4 Ionic Liquid – A Comparison with SbCl3
- Electroreduction of Nitrate at Copper Electrodes and Copper-PANI Composite Layers
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- A Way for Determining the Effective Three Phase Boundary Width of Solid State Electrochemical Reactions from the Primary and Secondary Current Distribution at Microelectrodes
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