Design of Pd–Zn Bimetal MOF Nanosheets and MOF-Derived Pd<sub>3.9</sub>Zn<sub>6.1</sub>/CNS Catalyst for Selective Hydrogenation of Acetylene under Simulated Front-End Conditions
oleh: Xinxiang Cao, Ruijian Tong, Siye Tang, Ben W. -L. Jang, Arash Mirjalili, Jiayi Li, Xining Guo, Jingyi Zhang, Jiaxue Hu, Xin Meng
| Format: | Article |
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| Diterbitkan: | MDPI AG 2022-09-01 |
Deskripsi
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 °C) to Pd<sub>3.9</sub>Zn<sub>6.1</sub> (~950 °C) then to Pd<sub>3.9</sub>Zn<sub>6.1</sub>/Pd (1000 °C) with the temperature increasing. The synthesized Pd–Zn-ins/CNS were further employed as catalysts for selective hydrogenation of acetylene. Pd<sub>3.9</sub>Zn<sub>6.1</sub> showed the best catalytic performance compared with other Pd–Zn intermetallic forms.