Effect of Pd nanoparticle size on the catalytic hydrogenation of allyl alcohol.
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.
Wilson
Orla M
OM
Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station, A5300, Austin Texas 78712-0165, USA.
Knecht
Marc R
MR
Garcia-Martinez
Joaquin C
JC
Crooks
Richard M
RM
D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry*; D006865:Hydrogenation; D053758:Nanoparticles / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D020005:Propanols / Q000737:chemistry*
D020005:Propanols; C006463:allyl alcohol; D010165:Palladium; D006859:Hydrogen