Dendritic mesoporous silica nanospheres (DMSNs) with center–radial pore structure were successfully fabricated via an anion-assisted method. Al-modified DMSNs-supported NiMo catalysts were prepared and used for hydrodesulfurization (HDS) of dibenzothiophene (DBT). The DMSNs supports and corresponding supported NiMo catalysts were characterized by SEM, TEM, N₂ adsorption/desorption, electron tomography (ET), ²⁷Al NMR, NH₃-TPD, UV–Vis spectroscopy, XPS, H₂-TPR, Raman spectroscopy, and Pyridine-FTIR spectra. The average pore diameter of DMSNs is around 26.4 nm, which is helpful for eliminating the diffusion resistance of S-containing compounds. The center–radial pore structure of DMSNs, confirmed by ET measurement, is beneficial for enhancing the accessibility of active sites in the pore channels. The incorporation of aluminum into the framework of DMSNs can improve the acidity and modulate the metal–support interaction. Consequently, NiMo/Al-DMSNs catalysts exhibited higher HDS conversions (97.9%) for DBT than commercial NiMo/γ-Al₂O₃ catalyst. The superior catalytic activity of NiMo/Al-DMSNs results from a perfect combination of large center–radial pore channels, increased acidity, suitable metal–support interaction, and good dispersion/accessibility of active metals.

具有中心-径向孔结构的树状介孔二氧化硅纳米球（DMSNs）是通过阴离子辅助方法成功制备的。制备了Al改性的DMSNs负载的NiMo催化剂，并将其用于二苯并噻吩（DBT）的加氢脱硫（HDS）。通过SEM，TEM，N ₂吸附/解吸，电子断层扫描（ET），²⁷ Al NMR，NH ₃ -TPD，UV-Vis光谱，XPS，H ₂对DMSNs载体和相应的负载NiMo催化剂进行了表征。-TPR，拉曼光谱和吡啶-FTIR光谱。DMSN的平均孔径约为26.4 nm，这有助于消除含S化合物的扩散阻力。ET测量证实了DMSN的中心-径向孔结构，有利于增强孔道中活性位点的可及性。将铝结合到DMSN的框架中可以改善酸度并调节金属与载体的相互作用。因此，的NiMo / Al的-DMSNs催化剂表现出较高的HDS转化率（97.9％）为DBT比商业的NiMo /γ-Al系₂ ö ₃催化剂。NiMo / Al-DMSNs优异的催化活性是由于大的中心-径向孔道，增加的酸度，合适的金属-载体相互作用以及活性金属的良好分散性/可及性的完美结合而产生的。