Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (04): 946-952.doi: 10.3866/PKU.WHXB20110434

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Gold Supported on Aminosilane-Functionalized SBA-15 for Chemoselective Hydrogenation of Crotonaldehyde

TIAN Li, ZHOU Gong-Bing, LI Zhen-Hua, PEI Yan, QIAO Ming-Hua, FAN Kang-Nian   

  1. Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • Received:2010-12-17 Revised:2011-02-24 Published:2011-03-29
  • Contact: PEI Yan, QIAO Ming-Hua E-mail:peiyan@fudan.edu.cn; mhqiao@fudan.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21073043, 20803011), Program of New Century Excellent Talents in Universities, China (NCET-08-0126), Science & Technology Commission of Shanghai Municipality, China (10JC1401800, 08DZ2270500), and State Key Laboratory of Catalytic Materials and Reaction Engineering, China (RIPP, SINOPEC).

Abstract:

Three kinds of aminosilane (APTS: 3-aminopropyltrimethoxysilane, TPED: N-[3-(trimethoxysilyl)-propylethylene]diamine, TPDT: trimethoxysilyl propyl diethylenetriamine) functionalized mesoporous SBA- 15 molecular sieves (denoted APTS-SBA-15, TPED-SBA-15 and TPDT-SBA-15) were synthesized by post-grafting. Using the static interaction between the amino group and chloroauric acid followed by chemical reduction, the gold nanoparticles were immobilized into the channels of SBA-15. The Au/aminosilane-SBA-15 catalysts were systematically characterized by N2 physisorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The liquid phase hydrogenation of crotonaldehyde to crotyl alcohol (CROL) was used to investigate the effect of aminosilanes on the catalytic performance of the Au/amine-SBA-15 catalysts. The results revealed that the electron-donating ability of the aminosilane determines the selectivity towards the hydrogenation of the C=O bond on the gold catalyst. A stronger aminosilane electron-donating ability results in higher electron density on the gold active sites, which leads to the higher selectivity and yield of CROL.

Key words: Au, SBA-15, Aminosilane, Crotonaldehyde, Selective hydrogenation, Crotyl alcohol

MSC2000: 

  • O643