Z. Knor et J. Plsek, ROLE OF ENERGY-DISSIPATION AND SURFACE MOBILITY IN HETEROGENEOUS CATALYSIS BY METALS, Collection of Czechoslovak Chemical Communications, 63(11), 1998, pp. 1851-1868
The fundamental role of excess energy dissipation and of surface speci
es mobility, both in the preparation of model metallic catalysts (bime
tallic catalysts, bimetallic oxide-supported catalysts), and in the ac
tivation of reactant molecules on the catalyst surfaces (single crysta
ls, bimetallic and bimetallic oxide-supported catalysts) are discussed
. A generalized model of surface interactions is proposed which satisf
actorily explains the trapping of particles from the gas phase at the
atomic steps and recovery of the trapping sites due to migration of th
e trapped species towards flat terraces. Higher probability of encount
er of these species with other reactants on flat terraces and easier d
esorption of the reaction products from there in comparison with the b
ound state at the edges of atomic steps can be expected. Results of FI
M and FEM studies of Pt, Dy-W, Pd-W and Pd-Mo systems are used to illu
strate selected features of the proposed general model.