Bimetallic Pd-Ni catalysts were prepared via impregnation method, with effects of Pd/Ni ratio (wt%) on their catalytic performance for the oxidation of cyclohexane with molecular oxygen being investigated. Synthesized catalysts were characterized by a series of techniques including XRD, Nitrogen adsorption–desorption, H₂-TPR, XPS, ICP-AES, TEM, SEM, and EDX. Compared to monometallic Pd, the addition of Ni to Pd was found to be effective in enhancing the selective oxidation of cyclohexane. Parameters such as the temperature of the reaction, reaction times, catalyst amount, initial oxygen pressure and different solvents were investigated. Optimum conditions to improve cyclohexane conversion and selectivity towards KA-oil (a mixture of cyclohexanone and cyclohexanol) over 4.0%Pd-4.0%Ni/KIT-6 catalyst included 140 °C, 1.0 MPa O₂ and acetonitrile as solvent. Under these reaction conditions, 10.87 % conversion and 95.45 % selectivity for KA-oil were observed after 8 h of reaction. Reusability studies of the selected catalyst revealed an outstanding stability along four reaction cycles.

通过浸渍法制备了双金属Pd-Ni催化剂，研究了Pd/Ni比例（wt%）对其催化氧化环己烷分子氧性能的影响。合成的催化剂通过一系列技术进行表征，包括 XRD、氮吸附-解吸、H ₂ -TPR、XPS、ICP-AES、TEM、SEM 和 EDX。与单金属 Pd 相比，发现将 Ni 添加到 Pd 中可有效增强环己烷的选择性氧化。研究了反应温度、反应时间、催化剂用量、初始氧气压力和不同溶剂等参数。提高环己烷转化率和对 KA-油（环己酮和环己醇的混合物）的选择性超过4.0%Pd-4.0%Ni/KIT-6 的最佳条件催化剂包括140°C、1.0 MPa O ₂和作为溶剂的乙腈。在这些反应条件下，反应 8 小时后观察到 10.87% 的转化率和 95.45% 的 KA-油选择性。所选催化剂的可重复使用性研究表明，在四个反应循环中具有出色的稳定性。