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Self-oscillations and surface waves during CO oxidation over Co

  • V. Yu. BychkovEmail author
  • Yu. P. Tulenin
  • M. M. Slinko
  • A. Ya. Gorenberg
  • D. P. Shashkin
  • V. N. Korchak
Article
  • 5 Downloads

Abstract

The paper looks into the temporal and spatial dynamics of a new oscillating system comprised of CO oxidation over Co. Reaction rate oscillations occurring in CO excess were similar to the ones observed over Ni. The periodic variation of oxygen imbalance together with the variation in colour changes during the oscillations indicated that the oscillations were closely connected with the reversible oxidation of Co to various Co oxides. The periodic oxidation/reduction of cobalt proceeded as surface waves. Unexpectedly, widely varying spatial structures and wavefront velocities were detected during the heating and cooling branches under identical reaction conditions: regular self-oscillations transforming into a “surface turbulence” state.

Keywords

Self-oscillations CO oxidation Co Spatiotemporal behavior Surface waves 

Notes

Acknowledgements

This work was supported by the Russian Science Foundation (Grant No. 17-13-01057).

Supplementary material

11144_2019_1673_MOESM1_ESM.zip (10 mb)
Supplementary material 1 (ZIP 10287 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • V. Yu. Bychkov
    • 1
    Email author
  • Yu. P. Tulenin
    • 1
  • M. M. Slinko
    • 1
  • A. Ya. Gorenberg
    • 1
  • D. P. Shashkin
    • 1
  • V. N. Korchak
    • 1
  1. 1.Semenov Institute of Chemical PhysicsRussian Academy of SciencesMoscowRussia

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