| There are abundant oscillations in electrochemical system, many determined chaos had been found .The study of electrochemical complex oscillations is important to the study of the mechanism of electrochemical reactions and the action of organism. It抯 shown that coupling and synchronization of electrochemical oscillations proved that two systems came into different way by acting each other. The study of chaos control in electrochemical complex oscillation gives we a way to utilize the information contained in the electrochemical system. In this paper, the anodic dissolution of copper into phosphoric acid was studied. We connect the electrochemical apparatus with computer by PCI-I71OHG card; the data acquisition can reach 10KW, and complete the program of disposal non-liner data. By numeral filtering, we get rid of noise in data. It can measure and control in real time and fit the common electrochemical measurement. By sweep voltammograms, we study the influence on the electrochemical oscillation through varying the concentration, temperature and rotating speed to find that the oscillation is the result of the breaking and forming of film coupling with the mass transport. When we varied the potential or temperature, find many type of oscillation, and determined there exist chaos oscillation by non-liner analysis. Varying the distance, the location of reference electrode and blocking by setting platinum sheet and polypropylene sheet studied the coupling influence of electric field and mass transport. The results proved that the synchronization was determined by mass transport, from the result of experience, we can conclude that the electrode surface can be considered as consisting of a large number of identical elementary. We used means of the delay feedback to control the chaos in the electrochemical complex oscillations; the result proved that the method is in effect. By this means, we stabilized the period one, period two and period three, and found the range of control-factor.
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