Covalent organic frameworks (COFs) are emerging novel catalyst carrier. In this work, Pd/COF-LZU1 was one-pot prepared by p-phenylenediamine (PDA), triformylbenzene (TFB), and palladium acetate (Pd(OAc)₂) under the catalysis of acetic acid (HAc). The effects of HAc concentration on the Pd/COF-LZU1 particle size, Pd loading, and catalytic activity in the reduction of 4-nitrophenol (4-NP) were investigated. It was found that, with the increased HAc concentration, the Pd/COF-LZU1 particle size reduced, and Pd loading and catalytic activity displayed maximum for 3 mol L⁻¹ HAc. The catalytic reduction of 4-NP can be described by the pseudo-first-order kinetic model, and the rate constant is 20 times higher than that of palladium acetate. Pd/COF-LZU1 also showed excellent stability and reusability, demonstrating great potential in catalytic reduction reactions.

共价有机骨架（COF）是新兴的新型催化剂载体。在这项工作中，Pd / COF-LZU1是由对苯二胺（PDA），三甲酰苯（TFB）和乙酸钯（Pd（OAc）₂）在乙酸（HAc）催化下制备的。研究了HAc浓度对Pd / COF-LZU1粒径，Pd负载和4-硝基苯酚（4-NP）还原催化活性的影响。发现随着HAc浓度的增加，Pd / COF-LZU1粒径减小，并且Pd的负载量和催化活性在3 mol L ^-1时表现出最大值HAc。4-NP的催化还原反应可以用拟一级动力学模型来描述，其速率常数比乙酸钯高20倍。Pd / COF-LZU1还显示出极好的稳定性和可重复使用性，显示出催化还原反应的巨大潜力。