Highly active and sinter-resistant Pd-nanoparticle catalysts encapsulated in silica

) that aresufficiently porous to allow unhindered mass transfer? 2) Howdoes the activity of the encapsulated catalysts compare totraditional supported Pd catalysts for CO oxidation andacetylene hydrogenation? 3) Do the shell structures providestability with respect to sintering at high temperatures?Nanoscale core/shell Pd@SiO