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A brief summary of the results of experimental observations of the e †ects of electric Ðelds on propagating reaction fronts and pulses is presented. A prototype ionic chemical system consisting of a substrate A`and an autocatalyst B`and two further non-reacting species C~and D`is then considered when an electric Ðeld with a constant current is applied. An autocatalytic reaction between A`and B`with a quadratic rate law is assumed. Results obtained from extensive numerical simulations of the model are reported. These show that the system is capable of supporting a variety of propagating fronts ; " kinetic waves Ï, " Kohlrausch boundaries Ï and complete species separation are all observed as well as a new type of wave front in which there is a much enhanced reaction rate. The behaviour is characterized in terms of the applied electric current, the ionic strength, and the ratio of the di †usion coefficients of the reacting species.

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