The adsorption of molecules on structured surfaces was studied using ab initio density-functional theory. The adsorption of H
2 and CO on the rather open Pd(210) surface is characterized and the corresponding binding energies and geometries are determined in the first part of this thesis. In contrast to low-index Pd surfaces, a molecular H
2 adsorption state is found to be stabilized by the presence of atomic hydrogen on the surface. The second part of this thesis is concerned with the chemical properties of pseudomorphic platinum multilayers on the Ru(0001) surface. The chemical reactivity as a function of the layer thickness is examined using the adsorption of atomic and molecular oxygen as well as carbon monoxide. The reactivity of the surface is changed by about the same magnitude through both the compression of the Pt multilayers as well as the direct interaction of the ruthenium substrate with the first two Pt layers.
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The adsorption of molecules on structured surfaces was studied using ab initio density-functional theory. The adsorption of H
2 and CO on the rather open Pd(210) surface is characterized and the corresponding binding energies and geometries are determined in the first part of this thesis. In contrast to low-index Pd surfaces, a molecular H
2 adsorption state is found to be stabilized by the presence of atomic hydrogen on the surface. The second part of this thesis is concerned with the chemical pr...
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