Synchronization between Kinetic Oscillations Occurring on Neighboring Nanoscaled Supported Platinum Clusters via Thermal Conduction

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• 作者：Ching-Cher Sanders Yan^† ; ; Yu-Wei Huang^‡ ; ; Shyi-Long Lee*^‡ ;
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：April 2, 2009
• 年：2009
• 卷：113
• 期：13
• 页码：5206-5211
• 全文大小：173K
• 年卷期：v.113,no.13(April 2, 2009)
• ISSN：1932-7455

文摘

Monte Carlo technique is applied to simulate the synchronization between neighboring kinetic oscillators of nanoscaled supported platinum particles. Non-isothermal kinetics caused by local overheating provides an extra thermal conduction channel for synchronization between oscillators. Kinetic oscillation is produced when fast carbon monoxide oxidation is accompanied with slow subsurface oxygen formation and removal. Different effects are investigated on synchronization, including thermal conduction efficiency, heat dissipation efficiency, and distance between the two oscillators. Decreasing thermal conduction efficiency isolates each kinetically oscillating catalyst and results in complicated oscillation patterns. Heat dissipation has the opposite influence on synchronization comparing to thermal conduction. Low heat dissipation from the substrate to the environment maintains the temperature of the system and thus promotes synchronization. In addition, synchronization is destroyed when the distance between two oscillating particles becomes several-fold longer than the platinum particle size.