The different catalytic behaviors of Mo3O10(C5H6N)2·H2O wires (MoOx–pyridine) in the selective oxidation of alcohols by means of molecular oxygen (O2) and hydrogen peroxide (H2O2) as green oxidants were investigated.

The Mo8O26(C5H6N)4.H2O hybrid with rectangular prism morphology was synthesized via a simple wet chemical method at room temperature in water. The as‐synthesized product was characterized by different methods, including X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT‐IR), Raman spectroscopy, N2‐adsorption/desorption and elemental analysis. The Mo8O26(C5H6N)4.H2O hybrid catalyzed Knoevenagel condensation reaction as a bi‐functional catalyst. Moreover, the molybdenum (VI) site in this hybrid catalyzed selective oxidation of alcohols in the presence of molecular oxygen (O2) as oxidant. The reaction of malononitrile with various aromatic aldehydes was carried out in aqueous media under mild temperature in the presence of no extra base or acid. On the other hand, the oxidation of alcohols with molecular oxygen progressed via a reusable heterogeneous system in a mild temperature. The reused catalysts from both systems were identified by XRD, FT‐IR, SEM and elemental analysis.

A novel hybrid material, (Ce III -Mo VI )O x /aniline, with rod-like morphology is synthesized through a wet chemical method using Mo 3 O 10 (C 6 H 5 NH 3 ) 2 .2H 2 O nanowires as precursor. The synthesized materials are characterized by XRD, XPS, SEM, TEM, FTIR, Raman, UV-Vis, TGA, and elemental analysis. Also, their catalytic activities as a hybrid catalyst are tested in the selective oxidation of sulfides using hydrogen peroxide as a green oxidant. The proposed novel hybrid catalyst shows an excellent performance under green conditions at mild temperature. Furthermore, the scalability of the oxidation reaction is shown by making multi-gram quantities at optimized conditions.

Mesostructured mixed metal oxides are one of the best candidates for various oxidations. Here, mesostructured Cux/Cey mixed oxides with various Cu/Ce ratios were prepared using mesoporous silica as a hard template to improve their selectivity and efficiency as the oxidative catalysts. Investigation of the different ratios of Cu/Ce showed that all catalysts are significantly more active than their salts in the oxidation of alcohols and sulfides with some green oxidants. The results demonstrated that the balance of the number of active catalytic centers (concentration of Cu) and the structural characteristics (surface area and oxygen vacancy) determine the activity of the catalysts. It also seems to be a powerful interplay among copper and cerium ions that helps the reduction of both Cu (II) and Ce (IV).