高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (3): 428.

• 论文 • 上一篇    下一篇

Pt(100)/NO+CO体系随机共振的理论研究

周宝晶, 杨灵法, 辛厚文   

  1. 中国科学技术大学化学物理系, 合肥 230026
  • 收稿日期:1998-03-15 出版日期:1999-03-24 发布日期:1999-03-24
  • 通讯作者: 辛厚文
  • 作者简介:周宝晶,男,22岁,学士.
  • 基金资助:

    国家自然科学基金(批准号:29673039)资助课题

Theoretical Study on Stochastic Resonance in Pt(100)/NO+CO System

ZHOU Bao-Jing, YANG Ling-Fa, XIN Hou-Wen   

  1. Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026
  • Received:1998-03-15 Online:1999-03-24 Published:1999-03-24

摘要: 在远离平衡的条件下,NO在Pt(100)表面进行的催化还原反应表现出化学振荡和化学多稳态等复杂的动力学行为.利用Fink等提出的反应模型,通过计算机模拟对体系的控制参量进行周期调制和随机调制,在简单双稳区以及振荡与稳态的共存区,观察到随机共振(StochasticResonance:SR)现象.

关键词: 随机共振, 非线性动力学, 表面催化反应

Abstract: The Pt(100)/NO+CO system exhibits complex kinetic phenomena such as chemical oscillation and multisteady state when located far from the equilibrium. Applying the mathematical model suggested by Fink, we add periodic and stochastic perturbations on carbon monoxide partial pressure in computer simulation. The result shows stochastic resonance(SR) phenomena existing in two different regions. One is the traditional bistable region, the other is the coexistence of the oscillation with the stable state. Acontrast between SR phenomena in the two regions demonstrates that the two coexisting states vary considerably in their stability.

Key words: Stochastic resonance, Nonlinear dynamics, Surface catalytic reaction

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