Reaction Kinetics and Catalysis Letters

, Volume 55, Issue 1, pp 51–57 | Cite as

Chemical oscillators based on the oxidation of Mn(II) by some halogens

  • Zuzana Melichová
  • Milan Melichercík
  • Anna Olexová
  • Ludovít Treindl
Article

Abstract

Chemical oscillators based on the oxidation of Mn(II) ions by bromine or chlorine in NaH2PO4−NaOH buffer solutions in a CSTR (continuous-flow stirred tank reactor) are described. The oscillations correspond to the two alternating processes. The first process is the oxidation of Mn(II) by HOBr or HOCl to Mn(IV) and the second one is of a micro-heterogeneous nature, consisting of the reduction of Mn c 4+ and Mn c 3+ centers on the surface of colloids (MnO2)col by halides.

Keywords

Oxidation Physical Chemistry Catalysis Chlorine MnO2 

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Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • Zuzana Melichová
    • 1
  • Milan Melichercík
    • 1
  • Anna Olexová
    • 1
  • Ludovít Treindl
    • 1
  1. 1.Department of Physical ChemistryComenius UniversityBratislavaThe Slovak Republic

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