Abstract
The activity of a surface oxygen transient, O−(s), for H-abstraction from an ammonia molecule undergoing surface diffusion at a Mg(0001) surface at 298 K has been simulated by computer modelling. The time dependence of the chemisorbed products, NH2(a), OH(a) and O2− (a), has been determined making reasonable assumptions of the activation energy for the surface diffusion of physisorbed ammonia, the surface life-time of O−(s) and the surface stoichiometry determined from XPS studies.
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