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运用EXAFS技术对加入P2O5或TiO2的MO-Ni-γ-Al2O3体系中Mo、Ni的K吸收边进行了分析，获得了体系中金属组分原子周围的微观结构信息，从而进一步证实P或Ti的加入有助于含量较高的Mo、Ni在载体表面的高度分散，样品中适量的P有助于形成较多的八面体结构，所有含P的样品中八面体结构含量均高于含Ti的样品，八面体结构Mo-O键上的氧在加氢脱硫反应中较易被硫取代，因而提高反应活性，这是含八面体结构较多的MoNiP样品的加氢脱硫活性优于MoNiTi样品的一个重要原因.
The K absorption edge of Mo and Ni in MO-Ni-γ-Al2O3 system doped with P2O5 or TiO2 was analyzed by EXAFS technique, and the microstructure information around the atoms of the metal components in the system was obtained. It was further confirmed that P or Ti Addition of Mo and Ni, which contribute to higher content of Mo, on the surface of the support, the amount of P in the sample helps to form more octahedral structure, and the content of octahedron in all P-containing samples is higher than that of Ti The oxygen on the Mo-O bond of the octahedral structure is easier to be substituted by sulfur in the hydrodesulfurization reaction, thus improving the reactivity, which is better than the MoNiTi sample in the MoNiP samples containing more octahedral structure An important reason.