Kinetic Monte Carlo study of competing hydrogen pathways into connected (100), (110), and (111) Ni surfaces

A computational kinetic Monte Carlo (KMC) experiments that examines the time scale and pathways of H-atom mobility across the step edges connecting (100), (110), and (111) surfaces and the time-scale and pathway of H-atom penetration in the sublayer of the surfaces is reported. The activation energies for H mobility from site-to-site using a realistic potential energy function are also determined.