An interesting Russian paper from 1999 discusses the disassociation of h2. It is titled “The enhanced catalytic dissociation of adsorbed hydrogen containing molecules”. http://www.icmp.lviv.ua/journal/zbirnyk.19/019/art19.pdf . by V.G.Litovchenko, A.A.Efremov
Abstract: Some general conceptions and mechanisms of dissociative adsorption and catalysis are analyzed. The role of such factors as electronic shell con_gurations of isolated atoms, crystalline structure of the surface, local structural irregularities and defects, orientation of the surface bonds, dimensional effects, the presence of foreign atoms in the local atomic environment as well as the local symmetry of adsorption center are discussed. These considerations were used in developing the program for computer simulation of the process. The catalytic properties of PdCu surface alloys are analyzed using computer modelling and thus the enhancement of dissociative adsorption of H_ for such a system is predicted. The experimental data, demonstrating the enhancement of sensitivity of MIS sensor with CuPd electrode in comparison with the pure Pd electrode, are presented.
