Catalyst poisoning refers to the effect that a catalyst can be `poisoned` if it reacts with another compound that bonds chemically to its active surface sites. This may have two effects: the total number of catalytic sites or the fraction of the total surface area that has the capability of promoting reaction always decreases, and the average di.....
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http://en.wikipedia.org/wiki/Catalyst_poisoning
Catalyst poisoning refers to the effect that a catalyst can be 'poisoned' if it reacts with another compound that bonds chemically (similar to an inhibitor) but does not release, or chemically alters the catalyst.
Found on
http://en.wikipedia.org/wiki/Glossary_of_fuel_cell_terms
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