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Mechanistic details of the Belousov–Zhabotinskii oscillations

✍ Scribed by D. Edelson; R. J. Field; R. M. Noyes

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
766 KB
Volume
7
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

A detailed chemical mechanism for the cerium catalyzed bromination and oxidation of malonic acid by bromate has been developed, and complete numerical solutions have been obtained for the temporal behavior of the concentrations of the intermediate species. The many points of similarity with the experimentally observed initial decay, long quiescence, and abrupt transition to sustained oscillation establish confidence in the essential validity of the proposed mechanism. Close examination of the time dependence of these species concentrations as well as the magnitude of the several reaction channels permits the clarification of the switching mechanism causing theoscillatory behavior of this system. The results appear to exhibit limit cycle behavior, in accordance with theoretical predictions.

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## Abstract An inorganic compound, NaH~2~PO~2~, has been found to generate temporal chemical oscillations in Belousov–Zhabotinskii type reactions when it is substituted for the organic reducing material. Gaseous products were removed by a constant flow of nitrogen carrier gas. Periodic Br~2~ evolut