Is Iodine Oxidation With Hydrogen Peroxide Coupled With Nucleation Processes

An intriguing step of Bray-Liebhafsky oscillatory reaction i.e. iodine oxidation with hydrogen peroxide was examined. This process is characterized by enormous stochasticity of reaction induction times in presence of mild mixing. In present investigations it was obtained that even in presence of mixing, stochasticity is seriously reduced with simple glass powder addition. Using transparent glass, standard deviations changed from 184.9 min to 10.6 min for 19 oC, and from 128.2 min to 1.9 min for 27 oC. Repeating experiments with amber glass, further confirmed those results since standard deviations changed from mentioned ones to 8.7min for 19 oC, and to 2.5 min for 27 oC. Inert glass particles enhanced heterogeneous nucleation of oxygen formed in chemical reactions. Together with previous analysis of involved kinetic barrier of the whole reaction it is an additional strong evidence of possible energetic coupling between nucleation of glass cavities and chemical reactions. Such processes are usually neglect...