Pt Nanoparticles Supported on Highly Dispersed Alumina Coated inside SBA‐15 for Enantioselective Hydrogenation
Pt Nanoparticles Supported on Highly Dispersed Alumina Coated inside SBA‐15 for Enantioselective Hydrogenation
复制标题
DOI：
10.1002/cctc.201000081
复制
发表时间：
2010-10
期刊：
影响因子：
4.5
通讯作者：
Hongna Wang;Xiaohong Li;Yi Meng Wang;Peng Wu
中科院分区：
文献类型：
--
作者：
Hongna Wang;Xiaohong Li;Yi Meng Wang;Peng Wu
采用固相研磨方法制备了一系列不同氧化铝负载量的Al2O3@SBA-15复合材料。 X射线衍射、N2吸附、FT-IR光谱和NMR光谱等各种技术被用来表征它们的结构和酸度。 Al2O3@SBA-15复合材料保留了SBA-15主体的介孔结构，并且氧化铝高度分散且均匀地涂覆在介孔内。 Al2O3@SBA-15 复合材料是 Pt 纳米颗粒的卓越载体，可用作丙酮酸乙酯对映选择性氢化的催化剂。 Al2O3@SBA-15 复合材料中源自 Al2O3 和 SBA-15 界面的布朗斯台德酸位点以及 Pt 纳米颗粒与 SBA-15 介孔内涂覆的氧化铝的适当相互作用都可以改善 Pt/Al2O3@SBA-15 催化剂的催化性能。
A series of Al2O3@SBA‐15 composites with different alumina loadings have been prepared using a solid‐state grinding method. Various techniques, such as X‐ray diffraction, N2 sorption, FT‐IR spectroscopy, and NMR spectroscopy, are used to characterize their structures and acidity. The Al2O3@SBA‐15 composites retain the mesostructure of the SBA‐15 host and the alumina is highly dispersed and uniformly coated inside the mesopores. The Al2O3@SBA‐15 composites serve as remarkable supports for Pt nanoparticles, which can be used as catalysts in the enantioselective hydrogenation of ethyl pyruvate. Both the Brønsted acid sites that originate from the interface of Al2O3 and SBA‐15 in the Al2O3@SBA‐15 composites and the appropriate interaction of Pt nanoparticles with alumina coated inside the mesopores of SBA‐15 can improve the catalytic behavior of Pt/Al2O3@SBA‐15 catalysts.