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

TIAN Li, 上海市分子催化和功能材料重点实验室, 复旦大学化学系, 上海 200433,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China, ZHOU Gong-Bing, LI Zhen-Hua, PEI Yan, QIAO Ming-Hua, FAN Kang-Nian
2011 Wuli huaxue xuebao  
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/
more » ... A-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.
doi:10.3866/pku.whxb20110434 fatcat:4hs32tuy3rbwlchkpplv5ktqua