Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (1): 91-97.DOI: 10.1016/S1872-2067(15)60940-8

• Special Column on New Porous Catalytic Materials • Previous Articles     Next Articles

Ni@Pd core-shell nanoparticles supported on a metal-organic framework as highly efficient catalysts for nitroarenes reduction

Siping Jian, Yingwei Li   

  1. State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guanzhou 510640, Guangdong, China;
  • Received:2015-06-07 Revised:2015-06-19 Online:2015-12-26 Published:2015-12-26
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21322606 and 21436005), the Specialized Research Fund for the Doctoral Program of Higher Education (20120172110012), the Fundamental Research Funds for the Central Universities, and the Natural Science Foundation of Guangdong Province (S2011020002397 and 2013B090500027).

Abstract:

Ni@Pd core-shell nanoparticles with a mean particle size of 8-9 nm were prepared by solvothermal reduction of bivalent nickel and palladium in oleylamine and trioctylphosphine. Subsequently, the first-ever deposition of Ni@Pd core-shell nanoparticles having different compositions on a metal-organic framework (MIL-101) was accomplished by wet impregnation in n-hexane. The Ni@Pd/MIL-101 materials were characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy and also investigated as catalysts for the hydrogenation of nitrobenzene under mild reaction conditions. At 30 ℃ and 0.1 MPa of H2 pressure, the Ni@Pd/MIL-101 gives a TOF as high as 375 h-1 for the hydrogenation of nitrobenzene and is applicable to a wide range of substituted nitroarenes. The exceptional performance of this catalyst is believed to result from the significant Ni-Pd interaction in the core-shell structure, together with promotion of the conversions of aromatics by uncoordinated Lewis acidic Cr sites on the MIL-101 support.

Key words: Nickel, Palladium, Core-shell nanoparticle, Metal-organic framework, Nitroarene, Hydrogenation, Heterogeneous catalysis