By Jacinto Sa, Anna Srebowata
Hydrogenation with inexpensive Transition Metals describes fresh advancements within the instruction of catalysts and their catalytic talents in chemoselective hydrogenation for the creation of excellent chemical compounds and pharmaceutical compounds. Emphasizing using reasonably cheap metals (Cu, Ni, Fe, and Ag) which are usually found in the shape of nanoparticles, the publication presents necessary response mechanism schemes, engineering ideas, and viewpoint for the field.
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Additional info for Hydrogenation with low-cost transition metals
12), which is done with the Lindlar catalyst. Another fragrance compound, dimethyloctenol, also has a selective semihydrogenation of a C≡C triple bond in its production scheme. The reaction is carried out with Lindlar catalysts. Because of the toxicity and health considerations posed by lead, scientists are trying to develop a new generation of Lindlar-type catalysts that solely contain palladium. The selectivity is controlled by careful preparation of palladium nanoparticles with narrow size distribution.
G. Manyar, R. Morgan, K. Morgan, B. Yang, P. Szlachetko, J. Sá, C. Hardacre, High energy resolution fluorescence detection XANES—An in situ method to study the interaction of adsorbed molecules with metal catalysts in the liquid phase, Catal. Sci. Technol. 3 (2013) 1497. M. Makosch, C. Kartusch, J. Sa, R. B. Duarte, J. A. van Bokhoven, K. Kvashnina, P. Glatzel, J. Szlachetko, D. L. A. Fernandes, E. Kleymenov, M. Nachtegaal, K. Hungerbühler, HERFD XAS/ATR-FTIR batch reactor cell, Phys. Chem. Chem.
However, they exhibit a remarkable selectivity toward hydrogenation of the carbonyl group, leaving the C=C double bonds in the furanyl ring unreacted. In this sense, Cu has been found to be the most selective among all tested metal catalysts. Selectivities above 98% to furfuryl alcohol have been achieved over monometallic Cu/SiO2 catalysts . Also, monometallic Ag catalysts have been found able to hydrogenate the C=O group of furfural with relatively good selectivity, but not as high as that of Cu.