Concerning the interpretation on ~27Al MAS-NMR spectra of Mo and NiMo ctalysts on Al-containing MCM-41 supports A reply to the comment by X.Carrier and M.Che on 'Ni and Mo interaction with Al-containing MCM-41 support and its effect on the catalytic

摘要

A new interpretation for the NMR signal observed at + 16 ppm in the ~27Al MAS-NMR spectra of Mo and NiMo/Al-MCM-41 catalysts was done.This signal was assigned to an Anderson-type heteropolymolybdate [Al(OH)_6Mo_6O_18]~(3-),which can be formed during impregnation step of the catalyst preparation,as well as a result of hydration of Al_2(MoO_4)_3 in calcined Mo and NiMo/Al-MCM-41 catalysts.