An inhibitory substance characterized by its propensity to attach very strongly, by
a true chemical bond
(e.g. covalent) to the surface atoms or ions constituting the catalytically active
sites. Poisons act in minute quantities. Typical poisons are
In most cases, activity and/or selectivity
cannot be recovered without a drastic change in operating conditions (most often
a regeneration). Recovery
, if at all, takes place very slowly and/or only partially.
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. doi:10.1351/goldbook