Inorganic bromate oscillators. Bromate-chlorite-reductant

Miklós Orbán, Irving R. Epstein

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Sustained oscillations in the concentrations of bromide and chlorine dioxide and the potential of a platinum electrode are observed in acidic solutions containing bromate, chlorite, and bromide in a flow reactor. The bromide flow may be replaced by a flow of any of several reducing agents (I-, SO32-, Fe(CN)64-, AsO33-, Sn2+) capable of generating bromide from bromate. The bromate-chlorite reaction is autocatalytic in batch and bistable in flow. It is shown how addition of the feedback species (bromide or other reductant) leads to oscillation. A nine-step mechanism is proposed which, in a series of computer simulations, gives qualitative agreement with the observed autocatalysis, bistability, and oscillation.

Original languageEnglish
Pages (from-to)3212-3219
Number of pages8
JournalJournal of physical chemistry
Volume87
Issue number17
Publication statusPublished - Dec 1 1983

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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