Co promotion of sonochemically prepared MoS2/Al2O3 by impregnation with Co(acac)2·2H2O

▶ CoMoS/Al2O3 catalyst prepared by impregnating sonochemically synthesized MoS2/Al2O3 catalyst with Co(acac)2·2H2O is very active in the HDS of DBT and 4,6-DMDBT. ▶ Co(acac)2·2H2O preferentially deposits on the MoS2 species. ▶ Co(acac)2·2H2O promotes the formation of the catalytically active CoMoS phases and suppresses the formation of the inactive Co9S8 phases.