Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (4): 715-722.doi: 10.3866/PKU.WHXB201401221

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Performance of a Metal-Organic Framework MIL-53(Al)-Supported Cobalt Catalyst in the CO Catalytic Oxidation Reaction

TAN Hai-Yan, WU Jin-Ping   

  1. Sustainable Energy Laboratory, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
  • Received:2013-10-21 Revised:2014-01-21 Published:2014-03-31
  • Contact: WU Jin-Ping E-mail:Wujp@cug.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21203253) and Natural Science Foundation of Hubei Province, China (2011CDA070).

Abstract:

Ametal-organic framework (MOF) material MIL-53(Al) (MIL: Materials of Institut Lavoisier) with high thermal stability was prepared by the solvothermal method, and it served as a support material for a cobalt catalyst in the CO oxidation reaction. A comparison between the catalytic performance of the MIL-53(Al) and the Al2O3 support material was carried out to understand the catalytic behavior of the catalysts. The catalysts were characterized by thermogravimetric-differential scanning calorimeter (TG-DSC), Fourier-transform infrared (FTIR) spectroscopy, N2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), and hydrogen temperature-programmed reduction (H2-TPR). The TG and N2 adsorption-desorption analyses showed that MIL-53(Al) had good stability and high surface area. XRD and TEM results indicated that the size of the Co3O4 nanoparticles (5.03 nm) supported on MIL-53(Al) was smaller than that (7.83 nm) on the Al2O3 support. The highly dispersed Co3O4 nanoparticles from the three-dimensional porous structure of MIL-53(Al) led to superior catalytic activity during CO oxidation. The H2-TPR spectra showed that the reduction in temperature of the Co/MIL-53(Al) catalyst was significantly lower than that of the Co/Al2O3 catalyst, implying a higher catalytic activity for the Co/MIL-53(Al) catalyst. Indeed, the heterogeneous catalytic composite material Co/MIL-53(Al) catalyst exhibited much higher activity than the Co/Al2O3 catalyst in the CO oxidation test with 98% conversion at 160 ℃ and 100% conversion at 180 ℃. The catalytic activity and structure of the Co/MIL-53(Al) catalyst were stable during the reaction.

Key words: Metal-organic framework, Solvothermal synthesis, MIL-53(Al), Cobalt catalyst, CO catalytic oxidation

MSC2000: 

  • O643