The Isomerization of Cyclopropane over Reduced Molybdena–Alumina Catalysts

Catalytic activities and surface properties of zeolite-supported molybdenum nitrides for NO reduction with H2

“…They reported that, after nitridation at 773 K, Mo 6+ dominated in 1.7 wt.% Mo/Al 2 O 3 , whereas in 13.0 wt.% Mo/Al 2 O 3 , Mo 4+ and Mo 5+ dominated. It was pointed out that the oxidation states of molybdenum species varied with molybdenum loading and reduction temperature [37]. Of the series of H-ZSM-5 zeolite-supported molybdenum nitride catalysts prepared in this study, only the 30 wt.% one showed diffraction lines of g-Mo 2 N. At a loading of 20 wt.% or lower, there were no diffraction lines other than those of H-ZSM-5 zeolite.…”

Comparison of metathesis activity of catalysts prepared by anchoring of MoO2(acac)2 on various supports

“…As one can see, the binding energies are in the range of 232.8-233.0 eV. These values are attributed to Mo VI surface species [10,24,[27][28][29][30]. Other Mo oxidation states have not been detected.…”

NiMoAl catalysts derived from heptamolybdate-intercalated layered double hydroxides for hydrodeoxygenation of anisole

“…The signals are fitted into three sets of Mo 3d doublets, which respectively corresponded to the IV, V, and VI oxidation state. Some researchers [35][36][37] found that only after 500°C reduction was Mo 3+ obtained on the Mo/γ-Al 2 O 3 catalysts, indicating that no valence lower than 3+ was obtained at the same reduction temperature. Based on these results, the reduction degree of molybdenum is strongly dependent on the acidity of the support.…”