Metals salts reduction

More direct and successful methods for the preparation of non-aqueous metal sols are desirable. Especially valuable would be a method that avoids the metal salt reduction step (and thus avoids contamination by other reagents), avoids electrical discharge methods which decompose organic solvents, and avoids macromolecule stabilization. Such a method would provide pure, non-aqueous metal colloids and should make efficient use of precious metals employed. Such colloids would be valuable technologically in many ways. They would also be valuable to study so that more could be learned about particle stabilization mechanisms in non-aqueous media, of which little is known at the present time. 

Carbonylation metal salt reduction by CO at high pressure with M-CO bond formation Polyhydride complex of the type L MHj (x > 3) Semibridging CO unsymmetrically bridged CO... 

General Procedure of Metal Salt Reduction Technique... 

No. Metal salt Reductant Solvent Conditions Product ... 

In this context, it is worth questioning Rieke s active metal preparation method, which should also produce such energy-rich, disorganized structures. Since the conventional metal salt reductions require prolonged heating, some deactivation can result from annealing, minimized in reactions performed under sonication in shorter times at lower temperature. ... 

Catalysis Organic pollutant removal, noble metal salt reduction Membranes + Powders ... 

By now, metal NPs of Au, Ag, Pd, Pt, Cu, Co, and Ni ean be easily synthesized, and many different types are commereially available. NPs can be synthesized either by physical methods such as vapor deposition and laser ablation or by chemical methods sueh as metal salt reduction or micelles (De Jongh 1994 Schmid 1994 Braunstein et al. 1999 Brust and Kiely 2002 Matolin et al. 1990 Masala and Seshadri... 

The reductions are exothermic and are generally completed within a few hours. In addition to the metal powder, one or more moles of alkali salt are generated. Convenient systems of reducing agents and solvents include potassium and THF, sodium and 1,2-dimethoxyethane (DME), and sodium or potassium with benzene or toluene. For many metal salts, solubility considerations restrict reductions to ethereal solvents. Also, for some metal salts, reductive cleavage of the ethereal solvents requires reductions in hydrocarbon solvents such as benzene or toluene. This is the case for Al, In, and Cr. When reductions... 

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