https://doi.org/10.1351/goldbook.M03951
A situation in which molecules of
adsorbate
are free to move about the surface. Mobility
of the adsorbate
will increase with temperature and mobile adsorption may be either localized or non-localized. In localized mobile adsorption the adsorbate
spends most of the time on the adsorption sites but can migrate or be desorbed and readsorbed elsewhere. In non-localized adsorption the mobility
is so great that a small fraction of the adsorbed species is on the desorption
sites and a large fraction at other positions on the surface.