文献类型：期刊文献

英文题名：Palladium supported on hierarchically macro-mesoporous titania for styrene hydrogenation

作者：Zeng, Tian-Ying[1]; Zhou, Zhi-Ming[1]; Zhu, Jun[1]; Cheng, Zhen-Min[1]; Yuan, Pei-Qing[1]; Yuan, Wei-Kang[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2009

卷号：147

期号：SUPPL.

起止页码：S41

外文期刊名：Catalysis Today

收录：EI(收录号：20093612285055)

语种：英文

外文关键词：Scanning electron microscopy - Palladium - Styrene - Mesoporous materials - X ray diffraction - Calcination - Catalyst activity - Titanium dioxide - Synthesis (chemical)

摘要：Hierarchically macro-mesoporous titania was synthesized by the simple dropwise addition of tetrabutyl titanate to an ammonia solution in the absence of surfactant molecules, and then calcined at different temperatures. The as-prepared titania was characterized by X-ray diffraction, N2 adsorption-desorption analysis and scanning electron microscopy. The results showed that the hierarchically marcro-mesoporous structure of the titania was well preserved after calcination at 650 °C, indicating high thermal stability. The 500 °C calcined titania with the hierarchically bimodal pore network was impregnated with 0.5 wt.% of palladium and compared with 0.5 wt.% Pd/TiO2 catalyst without such macrochannels. The novel macro-mesostructured Pd/TiO2 catalyst exhibited higher catalytic activity for styrene hydrogenation due to the lower diffusion resistance of species inside the catalyst caused by the hierarchically macro-mesoporous bimodal structure. ? 2009 Elsevier B.V. All rights reserved.