Two new mesoporous carbon-supported Co-Mo hydrodesulfurization catalysts with different Co contents have been successfully prepared by one-step vacuum freeze-drying, followed by calcination under a nitrogen atmosphere and washing. Evans-Showell polyoxometalate (NH₄)₆[Co₂Mo₁₀O₃₈H₄]·7H₂O was used as the Co-Mo precursor instead of the conventional precursors, and the obtained catalysts were structurally characterized by various technologies, including X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, H₂ temperature programmed reduction, CO temperature programmed desorption and low temperature N₂ adsorption-desorption isotherm. The results show that MoS₂ particles (4.6 nm and 4.5 slabs) are homogeneously dispersed in the mesoporous carbon framework with a narrow pore size distribution centered at 3.7 nm. The catalysts were evaluated by the hydrodesulfurization of dibenzothiophene, and the results show that the dibenzothiophene conversion, overall pseudo-first order rate constant and turnover frequency can reach 95 %, 5.4 × 10⁻⁶ mol g⁻¹ s⁻¹ and 6.1 × 10⁻³ s⁻¹ at 300 °C, respectively, indicating higher catalytic activity than previously reported catalysts. The higher proportion of the CoMoS active phase can account for the higher catalytic activity. By using in situ-produced sodium chloride crystals and thiourea as hard templates and sulfidizing agents respectively, this study opens a new avenue for the simple and environmentally friendly preparation of hydrodesulfurization catalysts with the synchronization and riveting of MoS₂ nanoflakes and 3D mesoporous carbon frameworks.

通过一步真空冷冻干燥、氮气气氛下煅烧和洗涤，成功制备了两种不同Co含量的新型介孔碳负载Co-Mo加氢脱硫催化剂。Evans-Showell多金属氧酸盐(NH ₄ ) ₆ [Co ₂ Mo ₁₀ O ₃₈ H ₄ ]·7H ₂ O作为Co-Mo前驱体代替了传统的前驱体，得到的催化剂通过多种技术进行了结构表征，包括X射线衍射、热重分析、扫描电子显微镜、高分辨率透射电子显微镜、X射线光电子能谱、H ₂程序升温还原、CO程序升温脱附和低温N ₂吸附-脱附等温线。结果表明，MoS ₂颗粒（4.6 nm 和 4.5 板）均匀分散在介孔碳骨架中，孔径分布窄，中心为 3.7 nm。通过二苯并噻吩的加氢脱硫对催化剂进行了评价，结果表明二苯并噻吩的转化率、总准一级速率常数和周转频率可达到95%、5.4 × 10 ^-6 mol g ^{- 1} s ^-1和6.1 × 10 ^-3秒^-1分别在 300°C 下，表明催化活性高于先前报道的催化剂。较高比例的 CoMoS 活性相可以解释较高的催化活性。_{本研究利用原位制备的氯化钠晶体和硫脲分别作为硬模板和硫化剂，为同步铆接MoS 2}纳米片和3D介孔碳骨架的加氢脱硫催化剂的简单、环保制备开辟了新途径。