In this work, we studied the preparation, characterization and catalytic activity of palladium nanocatalysts containing 4.7 and 10wt.% in metallic form supported in magnesium oxalate. The catalysts were prepared via the concept of deposition-precipitation, using Pd(OAc)2 as precatalyst. Pd/MgC2O4 catalysts were characterized by X-ray Diffraction (XRD). Both catalysts displayed diffraction lines at 2T = 40.12, 46.66 and 68.12 that are characteristic of the Pd metallic phase. Crystallite sizes were estimated from the integral width of the highest intensity line using the Scherrer equation and the values calculated were 2.3 and 2.8 nm for the catalysts 4.7 and 10wt.%, respectively. These catalysts were used for the racemization of (S)-1-phenylethylamine in toluene at 80�C, under hydrogen pressure. In the absence of hydrogen no racemization occurred. The best result was obtained for catalyst 4.7wt% metal loading that furnished the desired product in 9%ee. The use of other solvents and additives are under investigation.

Preparation, characterization, and catalytic activity of new heterogeneous palladium nanocatalysts

244th National Meeting (2012)

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