Noyes, Richard M. Department of Chemistry, College of Arts and Sciences, University of Oregon, Corvallis, Oregon.
Last reviewed:January 2020
- Redox oscillators
- Nucleation oscillators
- Oscillations coupled to mass transport
- Thermokinetic oscillators
- Reactions on surfaces
- Biological chemistry
- Related Primary Literature
- Additional Reading
A chemical reaction in which some composition variable of a chemical system exhibits regular periodic variations in time or space. It is a basic tenet of chemistry that a closed system moves inexorably toward an unchanging state called chemical equilibrium. That motion can be described by the monotonic increase of entropy if the system is isolated, and by the monotonic decrease of Gibbs free energy if the system is constrained to constant temperature and pressure. Because of this universal restriction on what is possible in chemistry, it may appear bizarre when electrodes in a solution generate the oscillating potentials shown in Fig. 1.
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