Investigation of MIS gas sensitive structures with Pd and Pd/Cu metal layers

The Enhanced Catalytic Dissociation of Adsorbed Hydrogen Containing Molecules

“…For example, the presence of oxygen results in such bonds reattachment when d-electrons prefer to be transferred to p-orbitals of the neighbours, rather than on the antibonding orbital of the adsorbing molecule [2,11]. On the contrary, the presence in the local atomic environment of a relatively electropositive elements (e.g.…”

“…We have used two different approaches to the modelling of the H 2 adsorption processes. The first is the computation of a MIS sensor response under hydrogen action [2,11]. The second approach in the modelling is the direct simulation of H 2 molecule behaviour during its adsorption on the pair of surface centers.…”

“…The main physical processes, which occur in MIS gas sensor with catalytic metal layer may be outlined as follows [2,11]. At the beginning, on the external surface of the active metallic layer, the dissociative adsorption and desorption of H 2 molecules takes place.…”

“…The problems of enhancing the catalytic activity of the surface solids were discussed for a long time both from theoretical and applied points of view [1][2][3][4][5]. The classical catalytic systems ordinarily use the transition metals in different modifications, mainly as a microporous composite, polycrystalline substrates, sometimes as monocrystalline samples.…”

“…metallic layer. Numerous experimental data show that catalytic yield of a reaction depends strongly on both the structure and on the composition of the catalyst surface [1][2][3][4][5]. In spite of such noble metals as Cu, Au of Ag are usually bad catalysts, the use of surface alloys consisting of transition and noble metals instead of a pure transition metal leads in many cases to more pronounced catalytic properties.…”