Bimetallic Pd-Cu/Al2O3 was prepared by wetness impregnation method and its catalytic activity on coupling reaction of pyridine to 2,2'-bipyridine was assessed in view of the effects of different molar ratios of Pd : Cu. It is found that Pd-Cu/Al2O3 has the small particle size and good dispersion through the characterization. Compared with Pd/Al2O3, Pd-Cu (1:2)/Al2O3 is the preferable catalyst under the optimum conditions of 1 MPa N2 pressure, 310 ℃ and 16 h. The conversion of pyridine is 35.4％, and the selectivity for 2,2'-Bipyridine is up to 99％, which is much higher activity than Pd/Al2O3. The directly coupled synthesis meets the requirements of the atomic economy better. The addition of Cu also reduces the dosage of Pd and lowers the cost. It is worth noting that the recycled Pd-Cu/Al2O3 catalyst still shows high activity and stability after three times.

WANG Lin;ZHANG Yimeng;WANG Guangyu;FENG Yisi;LI Qianwen

College of Light-Textile Engineering and Art,Anhui Agriculture University,Hefei 230036,China;School of Chemistry and Chemical En-gineering,Hefei University of Technology,Hefei 230009,China;Wuhu Youpai Nursing Products Technology Co.,Ltd,Wuhu 241000,China

武汉理工大学学报（材料科学版）（英文版）

[1]WANG Lin;ZHANG Yimeng;WANG Guangyu;FENG Yisi;LI Qianwen-.Bimetallic Pd-Cu /Al2O3 Catalyst for the Green Catalytic Synthesis of 2,2'-bipyridine from Pyridine)[J].武汉理工大学学报（材料科学版）（英文版）,2022(06):1123-1128

Bipyridine

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