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Palladium black
Palladium black is a coarse, sponge-like form of elemental palladium which offers a large surface area for catalytic activity. It is used in organic synthesis as a catalyst for hydrogenation reactions.
The term palladium black is also used colloquially to refer to a black precipitate of elemental palladium, which forms via decomposition of various palladium complexes.
Preparation
Palladium black is typically prepared from palladium(II) chloride or palladium(II)-ammonium chloride. while the palladium(II)-ammonium chloride route employs a solution of formic acid followed by the precipitation of the catalyst using potassium hydroxide.
References
References
- (2001). "Handbook of Heterogeneous Catalytic Hydrogenation for Organic Synthesis". Wiley-Interscience.
- (2004-06-01). "Homogeneous Palladium Catalyst Suppressing Pd Black Formation in Air Oxidation of Alcohols". Journal of the American Chemical Society.
- (1967). "Reactions of cycloalkanones in the presence of platinum-metal catalysts and hydrogen". Chemical Communications.
- (1911). "Über gleichzeitige Reduktions- und Oxydationskatalyse". Berichte der Deutschen Chemischen Gesellschaft.
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