非恒温CO表面催化氧化体系双随机共振

Stochastic Bi-resonance in Non-isothermal CO Surface Catalytic Oxidation System

当考虑化学反应热、热传导和热辐射的影响时,Pt(110)/CO+O2表面催化氧化体系温度出现时空变化.以衬底温度为控制参数,通过计算机模拟,研究了衬底温度噪声对该非恒温表面反应体系振荡动力学行为的影响.研究发现,温度噪声可以诱导体系双随机共振现象,而且增大衬底温度可以使体系共振行为由双随机共振变为单随机共振.这表明体系可以利用温度噪声加强其反应振荡,并对其具有双重选择性,人们可以通过改变衬底温度大小来控制体系的共振行为.

The system of Pt（110）/CO ＋ O2 involving chemical reaction heat, heat conduction and radiation heat transfer is non-isothermal. Its temperature periodically varies in time and space, and thus affects the oscillatory behavior of the system. Our goal is to investigate the effect of the support temperature（ST） noise on the oscillatory dynamics of the system. Taking support temperature（ST） as the control parameter, we studied, via numerical simulation, the effect of ST noise on the dynamic behavior of the non-isothermal surface reaction system. The noise-induced reaction oscillations and stochastic bi-resonance（SBR） are observed, which show that the system can bi-selectively employ the temperature noise to enhance its reaction oscillations. It is also found that the increase of ST can lead to the change of the type of stochastic resonance （ SR）, namely, the change from the SBR to single SR.