from the conferences organized by TANGER Ltd.
We performed calculations and recounts of various parameters related to the first quantitative study on the nucleation and growth of a catalyst model dispersed Pd/thin MgO(100) which was deposited at substrate temperatures ranging from 573 K - 1073 K. This simulation was performed by developing a new programs using Fortran. The nucleation kinetics are interpreted according to the theory of random nucleation. It follows that the general scheme is consisting of three stages: nucleation, growth and coalescence. It is shown that the saturation density of clusters decreases when the substrate temperature increases in following Arrhenius law. This behavior is in agreement with a recent AFM study for Ag/MgO and Au/MgO. The phenomena of coalescence can be explained by the process of island migration. The coalescence occurs at high substrate temperature more rapidly than at lower substrate temperature.
Keywords: Model catalyst, palladium, nucleation, growth, coalescence© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.