为了提升喹啉加氢制备1，2，3，4-四氢喹啉的反应活性，采用二维亚胺含芘共价有机骨架材料（Py-COF）为载体合成了Pd纳米颗粒催化剂（Pd/Py-COF），结果显示其在喹啉加氢中的活性是商用Pd/C催化剂的2.1倍。高分辨电镜、X射线光电子能谱、CO溶出伏安及对比实验等研究结果表明Pd/Py-COF的高活性来自富电子的Pd表面增加底物吸脱附及喹啉与Py-COF之间的弱相互作用。此外， Pd/Py-COF显示出了良好的循环使用性和底物适用性。该工作强调了采用COF骨架调控金属纳米粒子催化性能的重要性。

In this paper, we report that pyrene-containing imine covalent organic framework material (Py-COF) supported Pd nanoparticles exhibit significantly high activity in the hydrogenation of quinoline to 1,2,3,4-tetrahydroquinoline, with a turnover frequency (TOF) value 2.1 times that of commercial Pd/C. Through techniques such as high-resolution electron microscopy, X-ray photoelectron spectroscopy, cyclic voltammetry of CO stripping, and control experiments, we have identified that the heightened activity of the Pd/Py-COF catalyst in quinoline hydrogenation stems from the electron-rich Pd surface, which facilitates substrate adsorption/desorption, and the weak interactions between quinoline and Py-COF. Furthermore, Pd/Py-COF demonstrates excellent recyclability and superior catalytic performance in the hydrogenation of various quinoline derivatives. This work underscores the significance of utilizing COFs to regulate the catalytic performance of metal catalysts.