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    • Exchange current density as control for oscillatory reactions

      R Ramaswamy S Ramanathan

      Physical and Theoretical Volume 93 Issue 5 June 1984 pp 813-816

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/093/05/0813-0816

    • Keywords

       

      Oscillatory reaction; uncatalysed bromate system; exchange current density; oscillatory species; oscillatory control

    • Abstract

       

      The oscillation characteristics of the iodate systems (Briggs-Rauscher reaction) and the bromate system (Belousov-Zhabotinskii reaction) with ethylacetoacetate show that the species responsible for the oscillations in these two systems are different. This arises from a large value of the exchange current density for Pt/I2/I−. The inclusion of ferroin in an uncatalysed bromate system (ubs) leads to a switchover to a new oscillatory phase, catalysed bromate system (cbs). Oscillation inubs is caused by a periodic change in the concentration of bromine. The switchover in oscillation characteristics on the addition of ferroin results from the value of the exchange current density for Pt/Fe(III)/Fe(II) being larger than Pt/Br2Br−.

    • Author Affiliations

       

      R Ramaswamy1 S Ramanathan1

      1. Department of Chemistry, Indian Institute of Technology, Madras - 600 036, India

    • Dates

       
      Published
      June 1984
      Manuscript received
      6 July 1983
      Manuscript revised
      17 January 1984

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