Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5102358 | Physica A: Statistical Mechanics and its Applications | 2018 | 15 Pages |
Abstract
In this work we have investigated by Monte Carlo simulations the dynamical behavior of a modified Yaldram-Khan (YK) model for the catalytic reduction of NO on a surface. Our model is simulated on a square lattice and includes the individual desorption of CO molecules and N atoms, processes associated with temperature effects. When CO desorption is added, strong fluctuations appear, which are associated with the spreading of N checkerboard structures on the surface. These structures take a long time to coalesce, allowing the existence of a unsteady but long lasting reactive state. N desorption also favors the reactivity of the system, this time by diminishing the size of the N structures and impeding their coalescence. The combined desorption of CO and N produces a reactive state as well, where reactive zones among N structures can take place on the surface.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
J.J. DÃaz, G.M. BuendÃa,