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.通过对比两处SR现象的规律,发现在一定条件下。
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. A contrast between SR phenomena in the two regions demonstrates that the two coexisting states vary considerably in their stability.\=
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第3期428-431,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
随机共振
表面催化
一氧化氮
一氧化碳
还原
Stochastic resonance, Nonlinear dynamics, Surface catalytic reaction