Highly active hydrodesulfurization (HDS) catalysts have been prepared successfully through a molecular approach using well-defined Strandberg PMoNi polyoxometalates (POMs) as superior precursors. The hand-picked POMs significantly facilitated not only the formation of highly dispersed NiMo species but also the formation of abundant and accessible NiMoS active sites at lower sulfidation temperatures, thereby resulting in a remarkable activity improvement in comparison with reference catalysts prepared with conventional precursors. Characterization results revealed the multidirecting effects of the POMs component and structure on the morphology and composition of the species in the NiMoS active phase and the evolution of precursors during the catalyst preparation simultaneously. The bottom-up POMs-based preparation methodology provides a better understanding of HDS catalyst structure and performance, thus further shedding light on the rational design and controllable fabrication of efficient HDS catalysts.

高分子量的加氢脱硫（HDS）催化剂已经通过分子方法成功制备，使用了明确定义的Strandberg P Mo Ni多金属氧酸盐（POM）作为优良的前体。手工挑选的POM不仅显着促进了高度分散的Ni的形成Mo种类，而且在较低的硫化温度下还形成大量可接近的NiMoS活性位，因此与使用常规前体制备的参比催化剂相比，活性得到显着改善。表征结果表明，POMs的组成和结构对NiMoS活性相中物种形态和组成的多重导向作用以及催化剂制备过程中前体的演变。基于自下而上的基于POM的制备方法可更好地了解HDS催化剂的结构和性能，从而进一步阐明有效HDS催化剂的合理设计和可控制造。