Polymer-immobilized nanoparticles catalysis

Reduction is the most common technique to prepare polymer-immobilized nanoparticles. Two different types of reduction can be considered. The first type, or the impregnation method, consists of the chemical reduction of metals from solutions or suspensions of their salts. Ammoniacal solutions of Cu, Cr, and Ag hydroxides are often used. Electrochemical or radiation-induced reduction in the presence of macroligands have also been employed. The reduction of mononuclear metal complexes chemically bound with polymers represent the second type. The impregnation method is more widely applied because it better meets the needs of catalysis. In particular, metal blacks, ultradispersed powders, etc. are prepared. For example, Raney nickel is stabilized by incorporating it into the silicone rubber "" followed by vulcanization at room temperature. 

D. Catalysis Using Polymer-Immobilized Nanoparticles and Clnsters... 

Polymer-immobilized bimetallic Pt-Co colloids exhibit high selectivity (up to 99.8%) in the reaction of hydrogenation of cinnamaldehyde to the corresponding alcohol. The application of polymer-protected nanoparticles is expected to lead to the discovery of new specific effects in catalysis. The cluster Pfti5(CO)3o] fixed on Sephadex is used to catalyze of the hydrogenation of selective redox-active cofactors. ... 

---