Support-Enhanced Selective Aerobic Alcohol Oxidation over Pd/Mesoporous Silicas
journal contributionposted on 03.06.2011 by Christopher M. A. Parlett, Duncan W. Bruce, Nicole S. Hondow, Adam F. Lee, Karen Wilson
Any type of content formally published in an academic journal, usually following a peer-review process.
The influence of silica mesostructure upon the Pd-catalyzed selective oxidation of allylic alcohols has been investigated for amorphous and surfactant-templated SBA-15, SBA-16, and KIT-6 silicas. Significant rate enhancements can be achieved via mesopore introduction, most notably through the use of interconnected porous silica frameworks, reflecting both improved mass transport and increased palladium dispersion; catalytic activity decreases in the order Pd/KIT-6 ≈ Pd/SBA-16 > Pd/SBA-15 > Pd/SiO2. Evidence is presented that highly dispersed palladium oxide nanoparticles, not zerovalent palladium, are the catalytically active species.