Theoretical study on the effects of internal noise for rate oscillations during CO oxidation on platinum(110) surfaces.
Very recently, the effects of internal molecular noise in mesoscopic chemical reaction systems have gained growing attention. Using a mesoscopic stochastic model, the effect of internal noise for rate oscillation during CO oxidation on Pt(110) surface is studied analytically. In a parameter region outside but close to the supercritical Hopf bifurcation, a stochastic normal form is obtained from the chemical Langevin equation. By stochastic averaging procedure, the system is simplified and solvable. Noise-induced oscillation and internal noise coherent resonance (which is related to an optimal system size), observed from simulations, are well reproduced by the theory. The theoretical analysis helps to clearly figure out when and how the internal noise affects the system's oscillating dynamics.
Juan
Ma
M
Department of Chemical Physics, Hefei National Lab of Physical Science at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Hou
Zhonghuai
Z
Xin
Houwen
H