Herein, we prepared TiO₂ (rutile)-supported monometallic Ni and bimetallic Pd-Ni catalysts by thermal reduction of Pd_xNi_1−xTiO₃ (x = 0 and 0.045) and evaluated their performance for the chemoselective hydrogenation of nitrobenzene under optimized conditions. In contrast to Ni/TiO₂, Pd-Ni/TiO₂ featured a negligible loss of both conversion and aniline yield over five consecutive catalytic cycles, and instrumental analysis and catalytic activity evaluation revealed that this enhanced stability is due to Pd-Ni-alloy formation. Furthermore, Pd-Ni/TiO₂ was used to prepare aromatic-amines used as building blocks for the production of important drugs precursors, achieving conversions of >98 % and a chemoselectivity of 99 % in the absence of undesired side-reactions.

本文中，我们通过热还原Pd _x Ni _{1− x} TiO ₃（x  = 0和0.045）制备了TiO ₂（金红石）负载的单金属Ni和双金属Pd-Ni催化剂，并在优化条件下评估了它们对硝基苯的化学选择性氢化的性能。条件。与Ni / TiO _2相比，Pd-Ni / TiO ₂在五个连续的催化循环中转化率和苯胺收率的损失均可以忽略不计，并且仪器分析和催化活性评估表明，这种增强的稳定性归因于Pd-Ni-合金编队。此外，Pd-Ni / TiO ₂ 用于制备芳香胺，用作生产重要药物前体的基础材料，在不发生不良副反应的情况下，转化率> 98％，化学选择性为99％。