Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (1): 61-68.DOI: 10.11944/j.issn.1000-0518.2020.01.190161

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Preparation of Carbon-Supported Highly Dispersed Palladium Nanoparticles and Their Performance for Suzuki Reaction

LIU Minghui,LIU Yingcen,Lü Rongwen()   

  1. State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian,Liaoning 116024,China
  • Received:2019-05-31 Accepted:2019-05-31 Published:2020-01-08 Online:2020-01-08
  • Contact: LÜ Rongwen
  • Supported by:
    Supported by the Joint Funds of the National Natural Science Foundation of China(No.U1608223), the National Natural Science Foundation of China(No.21576044, No.21536002, No.21576039), and the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (No.21421005)

Abstract:

Firstly, Pd2+ ions are anchored on melamine-formaldehyde prepolymer by the coordination with N atoms on the prepolymer. Then the colloidal nanospheres grow on silica hydrogel via the simultaneous condensation reaction accelerated by 2,4-diaminobenzenesulfonic acid. Finally, the carbon-supported highly dispersed palladiumPd@C catalyst is obtained after calcination in an atmosphere of 5%(molar fraction) H2 and 95%(molar fraction) N2 gases, followed by being treated with 5% HF solution. The prepared highly dispersed Pd nanoparticles with a loading amount of 1.37%(mass fraction) have an average diameter of (2.4±0.87) nm, and the catalytic performance of Pd@C has been further evaluated by Suzuki reaction. With the addition of molar ratio 1:100 catalyst, Pd@C performs both good catalytic activity with a yield of 99.3% achieved within 5 minutes, and excellent durability after 8 cycles.

Key words: melamine, palladium nanoparticles, carbon-support, Suzuki reaction