Paraguay-Delgado F, García-Alamilla R, Lumbreras J A, Cizniega E, Alonso-Núñez G
Centro de Investigación en Materiales Avanzados S. C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, C.P 31109. Chih., México.
J Nanosci Nanotechnol. 2008 Dec;8(12):6406-13.
Two trimetallic sulfurs, MoWNiS and MoWSNi, were synthesized to be used as a catalyst in hydrodesulfurization reactions. The mixed oxide mesoporous nanostructured MoO3 -WO3 with an Mo:W atomic ratio of 1:1 was used as the precursor. The first catalyst was prepared by impregnating nickel in the oxide precursor and then subsequent sulfiding with an H2S/H2 mix at 400 degrees C for 2 hours. The second catalyst was prepared by sulfiding the precursor and then impregnating the nickel, and finally reducing the material with a H2/N2 at 350 degrees C. In both catalysts the Mo:W:Ni atomic ratio was maintained at 1:1:0.5. The materials obtained were characterized by physical adsorption of nitrogen, X-ray diffraction, scanning electron microscopy, transmission electron microscopy. Furthermore, the materials obtained were evaluated by a dibenzothiophene hydrodesulfuration reaction. The diffraction patterns show that both materials are polycrystalline and mainly of MoS2 and WS2 phases.
合成了两种三金属硫化物MoWNiS和MoWSNi，用作加氢脱硫反应的催化剂。以Mo:W原子比为1:1的混合氧化物介孔纳米结构MoO₃-WO₃作为前驱体。第一种催化剂是通过将镍浸渍在氧化物前驱体中，然后在400℃下用H₂S/H₂混合气硫化2小时制备的。第二种催化剂是通过将前驱体硫化，然后浸渍镍，最后在350℃下用H₂/N₂还原该材料制备的。两种催化剂中Mo:W:Ni原子比均保持在1:1:0.5。通过氮气物理吸附、X射线衍射、扫描电子显微镜、透射电子显微镜对所得材料进行了表征。此外，通过二苯并噻吩加氢脱硫反应对所得材料进行了评估。衍射图谱表明，两种材料均为多晶，主要为MoS₂和WS₂相。
