Pt nanoparticles supported on highly dispersed TiO2 coated on SBA-15 as an efficient and recyclable catalyst for liquid-phase hydrogenation
Pt nanoparticles supported on highly dispersed TiO2 coated on SBA-15 as an efficient and recyclable catalyst for liquid-phase hydrogenation
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涂覆在 SBA-15 上的高度分散的 TiO2 负载的 Pt 纳米颗粒作为高效且可回收的液相加氢催化剂
DOI：
10.1016/j.jcat.2012.12.007
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发表时间：
2013-04-01
影响因子：
7.3
通讯作者：
Wu, Peng
中科院分区：
文献类型：
--
作者：
Li, Xiaohong;Zheng, Wenli;Wu, Peng
以SBA-15为介孔氧化硅，采用溶胶-凝胶法制备了一系列不同TiO 2负载量的TiO2@SBA-15复合材料。TiO2@SBA-15复合材料保留了SBA-15主体的介观结构，并且TiO 2高度分散且均匀包覆。TiO2@SBA-15复合材料作为Pt纳米颗粒的良好载体，可有效地应用于苯甲醛及其衍生物等不饱和化合物在温和条件下的液相加氢反应。特别值得注意的是，Pt/TiO2@SBA-15催化剂可以重复使用多次，而活性或选择性没有明显损失。Pt/TiO2@SBA-15催化剂的缺电子表面状态以及结构和物理化学特征将提高其对不饱和化合物液相加氢的催化活性和可重复使用性。(C)2012 Elsevier Inc. All rights reserved.
A series of TiO2@SBA-15 composites with different TiO2 loadings have been synthesized through hydrolysis of tetrabutyl orthotitanate via a facile sol gel method in the presence of SBA-15 mesoporous silica. The TiO2@SBA-15 composites retain the mesostructure of the SBA-15 host, and TiO2 is highly dispersed and uniformly coated. The TiO2@SBA-15 composites serve as remarkable supports for Pt nanoparticles, which can be applied efficiently to the liquid-phase hydrogenation of benzaldehyde, its derivatives, and other unsaturated compounds under mild conditions. Of particular note is that the Pt/TiO2@SBA-15 catalysts can be reused several times without distinct loss in activity or selectivity. The more electron-deficient surface state, together with the structural and physicochemical features of Pt/TiO2@SBA-15 catalysts, would improve the catalytic activity and reusability toward the liquid-phase hydrogenation of unsaturated compounds. (C) 2012 Elsevier Inc. All rights reserved.