  Using molecular dynamics simulations, we predict that the inclusion of
nonadiabatic electronic excitations influences the dynamics of preadsorbed
hydrogen abstraction from the W(110) surface by hydrogen scattering. The
hot-atom recombination, which involves hyperthermal diffusion of the impinging
atom on the surface, is significantly affected by the dissipation of energy
mediated by electron-hole pair excitations at low coverage and low incidence
energy. This issue is of importance as this abstraction mechanism is thought to
largely contribute to molecular hydrogen formation from metal surfaces.
