Abstract

The catalytic performance of a bimetallic RhIn/SiO₂ catalyst was studied in the liquid-phase hydrogenation of nitrobenzene. The formation of intermetallic Rh₁In₁ nanoparticles was revealed by X-ray diffraction (XRD) analysis and confirmed by transmission electron microscopy (TEM) and IR spectroscopy of adsorbed CO. It was shown that, in comparison with monometallic Rh/SiO₂, the hydrogenation of nitrobenzene on the RhIn/SiO₂ catalyst proceeded at a higher rate and with higher selectivity. In contrast to the monometallic catalyst, the formation of by-products and the hydrogenation of the benzene ring did not proceed on the intermetallic sample. It was assumed that the higher selectivity of RhIn/SiO₂ can be associated both with a change in the electronic state of Rh atoms and with the geometry of the active sites.

中文翻译：

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基于金属间化合物 Rh1In1 颗粒的高选择性硝基苯加氢催化剂

摘要

研究了双金属RhIn/SiO ₂催化剂在硝基苯液相加氢中的催化性能。X 射线衍射 (XRD) 分析揭示了金属间化合物 Rh ₁ In ₁纳米粒子的形成，并通过透射电子显微镜 (TEM) 和吸附 CO 的红外光谱证实。结果表明，与单金属 Rh/SiO _{2 相比}， RhIn/SiO ₂催化剂上硝基苯的加氢反应速率较高，选择性较高。与单金属催化剂相反，副产物的形成和苯环的加氢在金属间化合物样品上没有进行。据推测，RhIn/SiO 的更高选择性₂可能与 Rh 原子的电子态变化和活性位点的几何形状有关。