Enhancement of the catalytic activities in propane oxidation and H-D exchangeability of hydroxyl groups by the incorporation with cobalt inot strontium hydroxyapatite

摘要

The oxidative dehydrogenation of propane ot proplene on strontium and cobalt-strontium hydroxyapaties (SrHAp and Co-SrHAp,respectively)and H-D exchangeability f hydroxyl groups in those catalysts with D_2O have bnne studied Both the yield of C_3H_6 and H-D exchangeability were found to be enhanced with increasing the caobalt contets in the catalysts,the latter of which was inverstigated by solid state ~1H MAS MNR at 25 kHZ.It is suggested that oxygen species,like lattice oxygen in oxide catalyst,as formed from lydrogen eeswrptions from OH groups in the hydroxyapatites,may contribute to the activation of C_3H_8.The structure of Co-SrHAp,of which the XRD pattern was identical to that of SrHAp,was also identified with extended X-ray absorption fine stucture (XAFS) AND SOLID STATE ~31p MAS NMR.