La1-xCexMnO3/attapulgite nanocomposites as catalysts for NO reduction with NH3 at low temperature

作     者：Xiazhang Li YU Yin Chao Yao Shixiang Zuo Xiaowang Lu Shiping Luo Chaoying Ni 

作者机构：fiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical Engineering Changzhou University Changzhou 213164 China R&D Center of Xuyi Attapulgite Applied Technology Chinese Academy of Sciences Xuyi 211700 China W. M. Keck CenterforAdvanced Microscopy and Microanalysis University of Delaware Newark DE 19716 USA 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2016年第14卷第3期

页      面：66-72页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) Jiangsu Technology Support Program Jiangsu International Cooperation Project Huai’an International Cooperation Project Prospective Joint Research Projects of Jiangsu Province 

主　　题：Attapulgite Rare earth perovskite Nanocomposite Selective catalytic reduction NO conversion 

摘      要：A series of attapulgite （ATP） supported perovskite-type La1-xCexMnO3 ix=0-0.2） nanocomposites were prepared by a sol-gel method. The samples were characterized by X-ray diffraction, transmission elec- tron microscopy, Fourier-transform infrared spectroscopy, H2 temperature-programmed reduction, and temperature-programmed desorption of NH3. Their selective catalytic reduction of NO with NH3 was evaluated in the low-temperature range. The impact of the doping fraction of Ce4＋ on the NO conversion was investigated. The results indicated that the La1-xCexMnO3 nanoparticles with a size of ca. 15 nm were uniformly immobilized on the surface of ATP with a loading amount of 20wt%. The highest conversion rate of NO reached 98.6% when the doping fraction x was O.1, while the ATP support supplied a high surface areas facilitating the nanoparticles dispersion as well as the gas adsorption. Incorporation of an appropriate amount of Ce4＋ in the La3＋ site resulted in a high degree of reduction by the active perovskite species with enhanced catalytic activity.