Magnetic and Mössbauer characterization of transition metal catalysts supported on aluminosilicates

Decomposition of Fe3(CO)12on a series of mordenites was studied by magnetic measurements and Mossbauer spectroscopy. Particle size determination for these Fischer-Tropsch catalysts indicated that the best dispersion can be obtained when the number of acid sites in mordenite is maximum. Thermomagnetic measurements and Mössbauer spectroscopy suggested that some iron clusters are inside the pores of mordenites. The change in the Mössbauer isomer shift for Fe/ mordenites elucidated the nature of metal-support interactions.