Co-containing polyoxometalate [Bu4N](4)H[PW11Co(H2O)O-39] (Co-POM) was supported on various NH2-modified mesoporous silicate ma-trixes (SBA-15, MCF, and SiO2-xerogel). The catalysts were characterized by elemental analysis, N-2 adsorption, DRS-UV, and IFTIR spectroscopy. alpha-Pinene autoxidation and its co-oxidation with isobutyraldehyde (IBA) over the supported Co-POM catalysts have been studied and compared with the corresponding processes in the presence of the homogeneous Co-POM. The autoxidation process affords allylic oxidation products, the selectivity to verbenol/verbenone decreases with alkene conversion and attains 70% at 20% conversion and 40% at 46% conversion. The catalysts can be used repeatedly without loss of the activity and selectivity during several catalytic cycles. Co-oxidation of alpha-pinene and IBA produces selectively alpha-pinene epoxide with up to 94% selectivity at 96% alkene conversion. The catalysts can be regenerated by evacuation. (c) 2006 Elsevier Inc. All rights reserved.