Forma, Vol. 15 (No. 3), pp. 257-265, 2000

Chaos and Spatiotemporal Pattern Formation in Electrochemical Reactions

Brian J. Green, Wen Wang and John L. Hudson

Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903-2442, U.S.A.

(Received April 19, 2000; Accepted May 19, 2000)

Keywords: Chaos, Spatiotemporal Patterns, Metal Electrodissolution, Synchronization

Abstract. Experiments on the dynamic behavior of some electrochemical reactions, with emphasis on metal dissolution, are discussed. Although patterns occur in the bistable, excitable, and periodic and chaotic oscillatory regions, we limit this presentation to the latter case. Emphasis is given to the importance of coupling of local reaction sites, in this case chaotic oscillators, in producing structure; in electrochemical systems long-range coupling often plays an important role. We discuss the use of arrays of electrodes in studying patterns and show examples of synchronization and clustering of chaotically reacting elements.

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