Successful monometallic and bimetallic metal–organic frameworks with different Co/Mn ratios have been synthesized under solvothermal conditions. The as-synthesized MOFs followed by deposition of Pd nanoparticles with 0.5 to 7 wt%. The XRD, BET, SEM, TEM, EDAX and FT-IR characterization results reveal that bimetallic MOFs and Pd nanoparticles were finely dispersed on the prepared MOFs surfaces. XRD results confirm the formation of the desire MOFs and show the high degree of dispersion of Pd nanoparticles. TEM images show that Pd nanoparticles are nano-sized with almost uniform shape. EDAX shows that Pd nanoparticles successfully loaded on Co_0.5–Mn_0.5-MOF-74 catalyst. CO oxidation as a model reaction was then used to assess the catalytic performance of the prepared catalysts. The catalytic activity results show enhancement in the catalytic activities of monometallic MOFs after introducing another metal in the same framework and show an excellent improvement in CO conversion after loading with Pd nanoparticles. Furthermore, the samples that contain Pd nanoparticles exhibits higher catalytic activities which raised with increasing the content of Pd nanoparticles.

中文翻译：

---

钯负载在混合金属-有机框架 (Co-Mn-MOF-74) 上用于 CO 的有效催化氧化

在溶剂热条件下成功合成了具有不同 Co/Mn 比的单金属和双金属金属有机骨架。合成后的 MOF，然后沉积 0.5 至 7 wt% 的 Pd 纳米颗粒。XRD、BET、SEM、TEM、EDAX和FT-IR表征结果表明，双金属MOFs和Pd纳米颗粒很好地分散在制备的MOFs表面上。XRD 结果证实了所需 MOF 的形成，并显示了 Pd 纳米粒子的高度分散。TEM 图像显示 Pd 纳米粒子是纳米级的，形状几乎均匀。EDAX 表明 Pd 纳米颗粒成功负载在 Co _0.5 –Mn _0.5上-MOF-74催化剂。然后将 CO 氧化作为模型反应用于评估所制备催化剂的催化性能。催化活性结果表明，在同一骨架中引入另一种金属后，单金属 MOFs 的催化活性得到了增强，并且在负载 Pd 纳米颗粒后，CO 转化率得到了显着改善。此外，含有 Pd 纳米颗粒的样品表现出更高的催化活性，随着 Pd 纳米颗粒含量的增加而提高。