Design of Pd-Zn Bimetal MOF Nanosheets and MOF-Derived Pd3.9Zn6.1/CNS Catalyst for Selective Hydrogenation of Acetylene under Simulated Front-End Conditions

Novel zinc-palladium-porphyrin bimetal metal-organic framework (MOF) nanosheets were directly synthesized by coordination chelation between Zn(II) and Pd(II) tetra(4-carboxyphenyl) porphin (TCPP(Pd)) using a solvothermal method. Furthermore, a serial of carbon nanosheets supported Pd-Zn intermetallics (Pd-Zn-ins/CNS) with different Pd: Zn atomic ratios were obtained by one-step carbonization under different temperature using the prepared Zn-TCPP(Pd) MOF nanosheets as precursor. In the carbonization process, Pd-Zn-ins went through the transformation from PdZn (650 degrees C) to Pd3.9Zn6.1 (similar to 950 degrees C) then to Pd3.9Zn6.1/Pd (1000 degrees C) with the temperature increasing. The synthesized Pd-Zn-ins/CNS were further employed as catalysts for selective hydrogenation of acetylene. Pd3.9Zn6.1 showed the best catalytic performance compared with other Pd-Zn intermetallic forms.

Automated summary

Novel zinc-palladium-porphyrin bimetal metal-organic framework (MOF) nanosheets were synthesized and transformed into carbon-supported Pd-Zn intermetallics with different Pd: Zn atomic ratios. Pd3.9Zn6.1 showed the best catalytic performance for selective hydrogenation.