Stochastic bi-resonance without external signal in the CO+O-2 catalytic oxidation reaction system

The noisy dynamic behavior of a surface catalytic reaction model to describ e the oxidation of carbon monoxide is investigated when the control paramet er is perturbed by external noise near a supercritical Hopf bifurcation poi nt. Noise induced coherent oscillation (NICO) is observed and the NICO stre ngth goes through two maxima with the increment of the noise intensity D fr om zero, characteristic of the occurrence of stochastic multiresonance with out external signal. The frequency of the NICO also increases with the incr ement of D. (C) 1999 American Institute of Physics. [S0021-9606(99)70627-6] .