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ruzuzu commented on the word catalyst poison
"Catalyst poisoning refers to the partial or total deactivation of a catalyst. Poisoning is caused by chemical compounds. Although usually undesirable, poisoning may be helpful when it results in improved selectivity. For example, Lindlar's catalyst is poisoned so that it selectively catalyzes the reduction of alkynes. On the other hand Lead from leaded gasoline deactivates catalytic converters."
-- https://en.wikipedia.org/w/index.php?title=Catalyst_poisoning&oldid=851286480
September 5, 2018