Palladium supported on mixed-metal-organic framework (Co-Mn-MOF-74) for efficient catalytic oxidation of CO

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.

Automated summary

Successful synthesis of monometallic and bimetallic metal-organic frameworks with different Co/Mn ratios under solvothermal conditions, followed by deposition of Pd nanoparticles. Characterization results show that Pd nanoparticles were finely dispersed on the MOFs surfaces. The catalytic activity of monometallic MOFs was enhanced by introducing another metal in the same framework, while loading with Pd nanoparticles showed an excellent improvement in CO conversion. Samples containing Pd nanoparticles exhibited higher catalytic activities with increasing Pd content.