| 초록 |
The performance of a heterogeneous catalyst depends directly on its composition, structure and surface properties. Here, we have investigated the influence of pore structure of mesoporous silica (m-SiO2) on enantioselective hydrogenation of ethyl pyruvate over chirally modified Pt. The use of MCM-41, SBA-15, KIT-6, and MCF reveals that pore structure and size of m-SiO2 supports significantly affect both activity and enantioselectivity. Among them, Pt/MCF with large pore exhibit excellent performance for enantioselective hydrogenation regardless of Pt content. In addition, further experiments with structurally controlled Pt/SBA-15 revealed that the catalyst with large pore and short channel showed superior catalytic performance. These results suggest that facile diffusion of chiral modifier through large mesopores support enable to exhibit high enantioselectivity and control of pore structure of support materials can improve catalytic performance on enantioselective hydrogenation. |
