Comparative study of β-nickel molybdate phase obtained by conventional precipitation and the sol-gel method

Mechanochemical synthesis of nanocrystalline nickel molybdates

“…Within the accuracy of the energy scale, there is no difference in the O 1s, Mo 3d 5/2 and Ni 2p 3/2 .peak positions. Similar observations are reported in a previous work [14,22]. The main Ni 2p 3/2 line for all NiMoO 4 samples exhibits a single peak with no low binding energy shoulder in contrast to that of NiO (Fig.…”

“…The catalytic properties are closely related to their structure and depend on the method of preparation and on the thermal treatment. Usually single crystalline NiMoO 4 can be obtained by solid state synthesis at high temperature [3,10], by coprecipitation from aqueous solutions of soluble salts [11,12], by the sol-gel method [13,14] or by high-pressure methods [8]. This work deals with mechanochemical activation of NiO and MoO 3 in order to obtain nanocrystalline and single-phase products.…”

Bimetallic single-source precursor for the synthesis of pure nanocrystalline room temperature-stabilized β-NiMoO 4

“…The bond Mo-O distances of type Mo-O and O-Mo-O bond angles are given in (Table S2) show that the octahedral geometry of the anion structure is distorted. The deviation of the angles from the standard octahedral values of 90° and 180° is similar to that previously reported for distorted octahedral Mo(VI) and W(VI) complexes of other hydroxycarboxylic acids such as tartaric acid, malic acid, and citric acid [23][24][25]. Furthermore, the crystal structure also shows that the Mo(VI) ion is not in the center of the anionic octahedron, but is displaced toward the two terminal oxo-ligands.…”

Preparation of Ni–Mo–C/Ti(C,N) coated powders and its influence on the microstructure and mechanical properties of Ti(C,N)-based cermets

“…After the thermal reduction process, the Ti (C,N) composite powders coated with nickel and molybdenum can be obtained. The main reactions taking place in the precipitation processing [10,11] are as follows:…”