(chemistry) platinum dioxide, a dark brown powder that is a catalyst for hydrogenation and hydrogenolysis in organic synthesis

Misspelling of Grubbs' catalyst.

(organic chemistry) Any of a range of transition metal carbene complexes used to catalyse olefin metathesis

(chemistry) A heterogeneous catalyst consisting of palladium deposited on calcium carbonate which is then poisoned with various forms of lead or sulphur. It is used for the hydrogenation of alkynes to alkenes.

plural of phase-transfer catalyst

(chemistry) A catalyst that migrates a reactant across a phase boundary