Active sites of iron catalysts for oxidation reactions H_2O oxidation and H_2O_2 decomposition

摘要

Systems containing metal ions stabilized in Si-O matrix are perspective for the development of new selective oxidation catalysts. The comparative study of the following catalysts were performed to elucidate the influence of structural factors on the catalytic properties of iron systems in the reactions H_2O oxidation, H_2O_2 decomposition, N_2O decomposition and ~16O_2<=>~18O_2 exchange. The following catalysts were used: A) carbon-supported polyhedral silsesquioxanes (PhSiO_1.5)_12(MO)_nL((MO_n)=(FeO)_6, Fe_2Ni_4O_6, (NiO)_6; L=ROH, H_2O); B) Fe-containing zeolites ZSM-5 (0.1-3.5 wt.