文献类型：期刊文献

英文题名：Role of acidity of catalysts on methane combustion over Pd/ZSM-5

作者：M'Ramadj, Ogtour[1]; Li, Dao[1]; Wang, Xingyi[1]; Zhang, Bo[1]; Lu, Guanzhong[1]

机构：[1]E China Univ Sci & Technol, Adv Mat Lab, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2007

卷号：8

期号：6

起止页码：880

外文期刊名：CATALYSIS COMMUNICATIONS

收录：;EI(收录号：20071510549330);WOS:【SCI-EXPANDED(收录号:WOS:000246247500006)】；

语种：英文

外文关键词：methane catalytic combustion; methane activation; Bronsted acid; palladium; ZSM-5

摘要：Palladium-based catalysts were prepared by the impregnation (1) and ion-exchange method (E) with ZSM-5 and 7-Al2O3 as support respectively. The high activity of Pd/ZSM-5(I) and Pd-ZSM-5(E) catalysts for methane combustion was observed. The order of activity is consistent with Bronsted acidity of catalysts: Pd/ZSM-5(I) > Pd-ZSM-5(E) > Pd/Al2O3. It is shown by FT-IR that methane adsorbs on acidic bridging hydroxyl groups of ZSM-5-supported Pd catalysts. Symmetric v(1) C-H stretching vibrations of methane shift to low frequency due to the interaction between methane molecules and Bronsted acid sites or Pd2+ indicating that methane molecules can be activated. (c) 2006 Elsevier B.V. All rights reserved.