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Three catalysts CoMo/γ-Al2O3, CoMo-La/γ-Al2O3, CoMo-Fe/γ-Al2O3 with different morphologies were prepared for study the effect of introduction of La and Fe on morphology properties and hydrodesulfurization (HDS) activity. The morphology properties of catalysts were characterized by BET, XPS and HRTEM. In addition, the catalytic performances of catalysts were investigated. The results indicated that the introduction of La and Fe promoted the sulfidation of Mo species and made the average length and stacking layer numbers of MoS2 slabs longer and higher. These effects could improve the activity of catalysts for HDS. The present results indicated that the catalyst modified by Fe had the best HDS activity with the optimal morphology among three catalyst

Morphology tuning of CoMo catalysts: Effect of La and Fe as an additive