Concerning the interpretation of 27Al MAS-NMR spectra of Mo and NiMo catalysts 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 be

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)6Mo6O18]3−, which can be formed during impregnation step of the catalyst preparation, as well as a result of hydration of Al2(MoO4)3 in calcined Mo and NiMo/Al-MCM-41 catalysts.