Nonlinear Physical Chemistry Unit
Service de Chimie Physique et Biologie
Théorique
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Reactions
such as those encountered in heterogeneous catalysis form a specific class
of non-equilibrium, nonlinear systems: they take place on low-dimensional
supports, the surfaces, exhibiting a particularly restricted geometry.
Because of this geometrical restriction, fluctuation-induced nanometric
self-organization can spontaneously arise and can lead to a
compartmentalization of the reactants and the products. We use mesoscopic
stochastic simulations and theoretical approaches to model the dynamics at
these scales and to understand the connection between the microscopic
details of the processes and the macroscopic rate laws for concentrations.
In particular, we study the propagation of waves, the emergence of
coherent oscillatory and explosive behaviors and apply these techniques
for the modeling of experimental systems such as the
H2+O2/Rh reaction with co-adsorbed potassium or the
NO+H2 reaction on platinum.
 References:
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