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Asymmetric heterogeneous catalysis facilitates the production of pure enantiomer compounds using chiral heterogeneous catalysts. [ 26 ] The majority of heterogeneous catalysts are based on metals [ 27 ] or metal oxides ; [ 28 ] however, some chemical reactions can be catalyzed by carbon -based materials, e.g., oxidative dehydrogenations [ 29 ...
Many heterogeneous catalysts are in fact nanomaterials. Heterogeneous catalysts are typically "supported", which means that the catalyst is dispersed on a second material that enhances the effectiveness or minimizes its cost. Supports prevent or minimize agglomeration and sintering of small catalyst particles, exposing more surface area, thus ...
Generally heterogeneous cross-coupling catalysts consist of a metal dispersed on an inorganic surface or bound to a polymeric support with ligands. Heterogeneous catalysts provide potential benefits over homogeneous catalysts in chemical processes in which cross-coupling is commonly employed—particularly in the fine chemical industry ...
Gold catalysts are especially selective in the hydrogenation of α,β-insaturated aldehydes, i.e. aldehydes containing a C=C double bond on the carbon adjacent to the carbonyl. Gold catalysts are able to hydrogenate only the carbonyl group, so that the aldehyde is transformed to the corresponding alcohol, while leaving the C=C double bond ...
In chemistry, a catalyst support or carrier is a material, usually a solid with a high surface area, to which a catalyst is affixed. [1] The activity of heterogeneous catalysts is mainly promoted by atoms present at the accessible surface of the material. Consequently, great effort is made to maximize the specific surface area of a catalyst ...
The mechanism of heterogeneous ring-opening metathesis polymerization is still under investigation. [7] Ring-opening metathesis polymerization of cyclic olefins has been commercialized since the 1970s. [4] Examples of polymers produced on an industrial level through ROMP catalysis are Vestenamer, Norsorex and ZEONEX, among others. [8]
Catalysts are often based on palladium, which is frequently selected due to high functional group tolerance. Organopalladium compounds are generally stable towards water and air. Palladium catalysts can be problematic for the pharmaceutical industry, which faces extensive regulation regarding heavy metals.
The Journal of Catalysis is a monthly peer-reviewed scientific journal covering research on all aspects of heterogeneous and homogeneous catalysis. It is published by Elsevier and it was established in 1962 by Jan Hendrik de Boer and P. W. Selwood. The current editor-in-chief is Johannes A. Lercher (Technische Universität München). [1]