A novel Pd immobilized catalyst has been prepared via surface modification of magnetic silica and characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), UV–Vis spectroscopy, X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM) and inductively coupled plasma-optical emission spectrometry (ICP-OES) analysis. The prepared composite material found to be highly efficient and recyclable heterogeneous catalyst for the Suzuki coupling reaction in aqueous medium with high turnover number (TON) of 1138 and turnover frequency (TOF) of 2276 h⁻¹. The Pd content of the catalyst was 0.09 mol% and afforded excellent to good yield of biaryls from a wide variety of aryl halides, including electron- withdrawing and releasing groups. The catalyst was reused up to six cycles with 97% efficiency for the Suzuki coupling reaction.

通过对磁性二氧化硅进行表面改性制备了一种新型 Pd 固定化催化剂，并通过傅里叶变换红外 (FTIR) 光谱、热重分析 (TGA)、紫外-可见光谱、X 射线衍射仪 (XRD)、扫描电子显微镜 (SEM) 进行表征、能量色散 X 射线光谱 (EDX) 和透射电子显微镜 (TEM) 以及电感耦合等离子体发射光谱 (ICP-OES) 分析。发现制备的复合材料是一种高效且可回收的多相催化剂，用于水性介质中的 Suzuki 偶联反应，具有 1138 的高周转数 (TON) 和 2276 h ^{-1 的}周转频率 (TOF). 该催化剂的 Pd 含量为 0.09 mol%，并提供了从各种芳基卤化物（包括吸电子和释放基团）获得联芳基的极好收率。在 Suzuki 偶联反应中，催化剂可重复使用多达 6 个循环，效率为 97%。