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.
Source:
PAC, 1976, 46, 71
(Manual of Symbols and Terminology for Physicochemical Quantities and Units - Appendix
II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II:
Heterogeneous Catalysis)
on page 76
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
