title: Hydrogenation of 1-Hexene and Hexadienes by Ultrafine Pd Particles Supported on the Surface of PrPO(4) Hollow Particles.
abstract: Novel fine polymer particles containing ultrafine Pd particles dispersed on the surface of core shell [core, poly(styrene-co-acrylic acid); shell, PrPO(4)]-type microspheres were prepared by the emulsifier-free emulsion polymerization of styrene with acrylic acid followed by the addition of PdCl(2) and a mixture of Pr(NO(3))(3) and NaH(2)PO(2). Pyrolysis of the resulting polymer particles at 900 degrees C provides organic polymer-free hollow particles (diameter, 473-586 nm) composed of Pd metal and PrPO(4). Hydrogenation of 1-hexene, trans-1,3-hexadiene, trans-1,4-hexadiene, and 1,5-hexadiene using the resulting Pd/PrPO(4) particles (reactant/Pd = 500 mol/mol) as catalyst revealed very high activity, especially for hydrogenations of 1-hexene and 1,5-hexadiene as compared with conventional Pd particles/Al(2)O(3) and Pd particles on powdered PrPO(4). Copyright 1999 Academic Press.
authors.affiliation: Faculty of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan
authors.initials: H
authors.lastname: Tamai
authors.initials: T
authors.lastname: Ikeya
authors.initials: H
authors.lastname: Yasuda