Effect of Pd nanoparticle size on the catalytic hydrogenation of allyl alcohol
Journal of the American Chemical Society, 2006•ACS Publications
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 …
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 …
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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