A series of new NiS-MoS- ( = 0–0.5) sphere-flower hybrids with different Ni/Mo molar ratios, synthesized via a one-pot hydrothermal method, were used as catalysts for hydrodesulfurization (HDS) of thiophene (TP) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT). The characterizations show that the microstructure of MoS, including the size of MoS nano-flowers, the length of MoS slabs, and the number of defects, was regulated by changing Ni/Mo ratios. Increasing the Ni/Mo ratio in the NiS-MoS- catalysts significantly boosts their HDS activity, with the optimum ratio being 0.2. In addition, the NiS-MoS-0.2 catalyst exhibits the best direct desulfurization performance, which is associated with the minimum ratio of average slab length () to average stacking number () as well as the highest concentration of Ni-promoted Mo sites and sulfur vacancies. Moreover, Ni-containing NiS-MoS- catalysts, characterized by a highly stable sphere-flower configuration, exhibit superior structural stability and catalytic durability than the Ni-free NiS-MoS-0 catalyst.

中文翻译：

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原位合成介孔NiS2-MoS2球花杂化材料用于噻吩和4,6-二甲基二苯并噻吩加氢脱硫

通过一锅水热法合成了一系列不同 Ni/Mo 摩尔比的新型 NiS-MoS- ( = 0–0.5) 球花杂化物，用作噻吩 (TP) 加氢脱硫 (HDS) 和4,6-二甲基-二苯并噻吩（4,6-DMDBT）。表征表明，MoS2 的微观结构，包括 MoS2 纳米花的尺寸、MoS2 板的长度和缺陷数量，可以通过改变 Ni/Mo 比例来调节。增加NiS-MoS-催化剂中的Ni/Mo比率可显着提高其HDS活性，最佳比率为0.2。此外，NiS-MoS-0.2催化剂表现出最好的直接脱硫性能，这与平均板片长度（）与平均堆叠数（）的最小比率以及Ni促进的Mo位点和硫的最高浓度有关职位空缺。此外，含镍的NiS-MoS-催化剂具有高度稳定的球花构型，与不含镍的NiS-MoS-0催化剂相比，表现出优异的结构稳定性和催化耐久性。