Temporal oscillations of the cerium(IV)-catalysed Belousov-Zhabotinsky reaction under addition of various Brconcentrations are investigated. The relationship between the induction period and Brconcentration, which is a controlling species in the BZ oscillating reaction, is reported. The oscillations of the Ce(IV) catalyst are followed by using UV-Vis spectrophotometric methods under closed batch and oxygen free systems. Experimental observations demonstrate that increasing Brconcentration decreases the induction period exponentially, whereas it increases the oscillation period linearly. The results reveal that the oscillations without induction period are observed by the addition of 1.0 × 10 −2 M Brconcentration. Addition of Brinto the BZ solution mainly involves the process A of the FKN mechanism. Numerical results reveal that the addition of Brincreases the production of BrMA, but decreases the induction period.
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