A monometallic catalyst MoS₂/Al₂O₃ and a Ni-promoting catalyst NiMoS₂/Al₂O₃ were prepared through using nano-sized MoS₃ particles as the precursor. XPS analysis combined with a DBT probe test indicate that, compared with the conventional catalyst Ref-MoS₂/Al₂O₃ derived from nano-sized MoO₃ particles, the MoS₃-derived catalyst MoS₂/Al₂O₃ not only contains nearly fully-sulfided Mo species, but also holds much more coordination unsaturated sites (CUS) on its MoS₂ nanoslabs, thus resulting in the successful preparation of a bimetallic catalyst NiMoS₂/Al₂O₃ with much weaker Mo-Al₂O₃ interaction and higher decoration degree of Ni atoms onto MoS₂ nanoslabs as compared with the conventional counterpart. These significant structural advantages of the bimetallic catalysts not only avoid the strong interference of γ-Al₂O₃ to the active phase, but also bring potential excellent Ni-promoting effects on the catalytic activity. Then, using quinolone (Q) as the reactant, the Ni-promoting effect on the hydrodenitrogenation (HDN) activity was discussed. It was found when MoS₂ nanoslabs were decorated by Ni atoms, the HDN activity attains an essential improvement. Moreover, this Ni-promoting effect is much more beneficial to the Path II (Q→14THQ/58THQ→DHQ→PCHA→PCHE + PCH) than Path I (Q→14THQ→OPA→PB). The origin of Ni-promoting effects on HDN activity was finally suggested: Ni atoms one hand activate H₂ to produce activated hydrogen which afterwards react with Mo-S^2- species to form Mo-SH species, and on the other hand increase the basicity of the neighboring Mo-S^2-, which together promote the cracking of C-N bonds and thereby remarkably enhance the HDN activity.

以纳米级的MoS ₃颗粒为前驱体，制备了单金属催化剂MoS ₂ / Al ₂ O ₃和助镍催化剂NiMoS ₂ / Al ₂ O ₃。XPS分析结合DBT探针测试表明，与源自纳米MoO ₃颗粒的常规催化剂Ref-MoS ₂ / Al ₂ O _3相比，MoS ₃衍生的催化剂MoS ₂ / Al ₂ O ₃不仅包含几乎完全硫化的Mo物种，而且在其MoS ₂纳米板上还具有更多的配位不饱和位点（CUS），从而成功制备了具有弱得多的Mo-Al的双金属催化剂NiMoS ₂ / Al ₂ O ₃与传统方法相比，MoS ₂纳米板上具有₂ O ₃相互作用和较高的Ni原子修饰度。该双金属催化剂的这些显著结构上的优点，不仅避免强干扰的γ-Al ₂ ö ₃到活性相，还带来潜在的极好的镍催化活性。然后，以喹诺酮（Q）为反应剂，探讨了镍对加氢脱氮（HDN）活性的促进作用。发现当用Ni原子修饰MoS ₂纳米板时，HDN活性得到了本质的改善。而且，这种镍促进作用比路径I（Q→14THQ→OPA→PB）对路径II（Q→14THQ / 58THQ→DHQ→PCHA→PCHE + PCH）更有利。最终提出了促进HDN活性的Ni促进作用的起源：Ni原子一方面激活H ₂以产生活化的氢，然后与Mo-S ^2-物种反应形成Mo-SH物种，另一方面增加碱度。相邻的Mo-S ^2-，它们一起促进CN键的断裂，从而显着增强HDN活性。