Bubanja Itana Nuša, Taylor Annette Fiona, Stanisavljev Dragomir
University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia.
The University of Sheffield, Department of Chemical and Biological Engineering, Mappin Street, Sheffield, S1 3JD, UK.
Phys Chem Chem Phys. 2024 Oct 2;26(38):24975-24982. doi: 10.1039/d4cp02742f.
Recently, we developed a conceptually new model of the Bray-Liebhafsky (BL) oscillatory reaction based on specific redistribution of energy connected with the formation of a new gaseous phase in the system. The model predicts that the amplitude of concentration oscillations and their frequency are tightly connected with the total amount of oxygen in the solution, present in the form of dissolved molecules and oxygen bubbles (gas cavities). As a new conceptual approach, it needs extended experimental support for further corroboration. In this work, we developed an experimental setup for simultaneous measurement of the redox state of the system by a Pt electrode, flow of the oxygen above the reaction mixture and temperature of the solution. In this way the oscillatory evolution is correlated with the formed oxygen in the system at different mixing rates and the highly exothermic development of the oxidation branch. The obtained results give strong support for the predictions of the model and offer a new conceptual base for deeper understanding of the reaction mechanism.
最近，我们基于与系统中新气相形成相关的特定能量重新分布，开发了一种概念全新的布雷-利布哈夫斯基（BL）振荡反应模型。该模型预测，浓度振荡的幅度及其频率与溶液中以溶解分子和氧气气泡（气腔）形式存在的氧气总量紧密相关。作为一种新的概念方法，它需要更多的实验支持来进一步证实。在这项工作中，我们开发了一种实验装置，用于通过铂电极同时测量系统的氧化还原状态、反应混合物上方的氧气流量以及溶液温度。通过这种方式，振荡演化与系统中不同混合速率下形成的氧气以及氧化分支的高度放热过程相关联。所获得的结果为该模型的预测提供了有力支持，并为更深入理解反应机理提供了新的概念基础。
