Lattice-gas study of the kinetics of the catalytic NO-CO reaction on rhodium surfaces. II. The effect of nitrogen surface islands A fast x-ray photoelectron spectroscopy study of the NO-H 2 reaction over Rh(533): Identifying surface speciesThe kinetics of the catalytic reduction of NO by CO on Rh͑111͒ was simulated by using a lattice-gas model and a Monte Carlo algorithm. These simulations were designed to incorporate some new experimental results, which reveal that the formation of a N-NO intermediate is necessary for molecular nitrogen production. The steady-state phase diagram for the overall NO reduction reaction was studied in terms of several parameters representing different reaction schemes. It was found that, under the assumptions made in the model, an Eley-Rideal mechanism which includes a NO͑gas͒ϩN͑ads͒→N 2 ͑gas͒ϩO͑ads͒ step is absolutely necessary to be able to sustain a steady-state catalytic regime.

A comparative study of thermal desorption spectra obtained through Monte Carlo simulation for monomers, symmetric dimers, and asymmetric dimers, on heterogeneous surfaces presenting different topographies of two kind of sites, is presented in such a way as to serve as a guide for the interpretation of experimental data.

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