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J Am Chem Soc. 2006 Apr 12;128(14):4510-1.

Effect of Pd nanoparticle size on the catalytic hydrogenation of allyl alcohol.

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  • 1Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station, A5300, Austin Texas 78712-0165, USA.


We report a particle size dependence for the rate of hydrogenation of allyl alcohol using 1.3-1.9 nm Pd dendrimer-encapsulated nanoparticle (DEN) catalysts. For particles with diameters of <1.5 nm and containing <147 Pd atoms, the modulation in catalytic activity is due to the electronic properties of the particle. For the larger particles, 1.5-1.9 nm in diameter and containing an average of 147-250 Pd atoms, the size effect is a result of geometrical constraints. Specifically, the hydrogenation reaction is shown to occur preferentially on the face atoms of the larger nanoparticles.

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