Theory of Absolute Rates of Gas/Solid Interface Reactions

Yu. K. Tovbin^z

Karpov Institute of Physical Chemistry (RF State Research Center)
ul. Vorontsovo Pole, 10, Moscow, 105064, Russia

Received May 28, 2008

Abstract—The discussed results yielded from development of the absolute reaction rate theory for surface pro-
cesses, which was initiated by works of M. I. Temkin on uniform and nonuniform solid surfaces. His works also
studied the interaction effect of adsorbed particles to the kinetics of surface reactions and discussed several
adsorption sites blocked by adsorbed particles, kinetic complications caused by low mobility of adsorbed par-
ticles, and effect of high pressures in gas phase. At the present time, the theory of surface processes provides
simultaneous account of all the major physical factors: nonuniform surface, interaction of adsorbed particles,
size of particles, limited mobility of reagents, and rearrangement of surface. This review analyzes the role of
self–consistent description of elementary reaction rates and equilibrium reaction system, which was empha-
sized by M.I. Temkin. The self-consistency requirement for dense surface phases, which realize cooperative
behavior of reagents, indicates to the restrictions of the earlier derived kinetic equations.

Key words: absolute reaction rate theory, nonuniform surface, interaction of particles, mobility of molecules,
blocking adsorption sites, lattice gas model

DOI: 10.1134/S102319350909002X

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