A highly efficient Rh-modified Pd/Al2O3 close-coupled catalyst

被引：12
|
作者：
Fang, Ruimei [1 ,3 ]
Cui, Yajuan [2 ,3 ]
Chen, Sijie [3 ]
Shang, Hongyan [1 ,3 ]
Shi, Zhonghua [3 ]
Gong, Maochu [3 ]
Chen, Yaoqiang [1 ,3 ]
机构：
[1] Sichuan Univ, Coll Chem Engn, Chengdu 610064, Sichuan, Peoples R China
[2] Sichuan Univ, Coll Architecture & Environm, Chengdu 610064, Sichuan, Peoples R China
[3] Sichuan Univ, Coll Chem, Minist Educ, Key Lab Green Chem & Technol, Chengdu 610064, Sichuan, Peoples R China
来源：
CHINESE JOURNAL OF CATALYSIS | 2015年 / 36卷 / 02期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Close-coupled catalyst; Palladium; Rhodium; Propane; Direct oxidation reaction; Reduction reaction; Steam reforming reaction; OXIDE-SUPPORTED PD; METHANE COMBUSTION; NOX STORAGE; OXIDATION; PERFORMANCE; DECOMPOSITION; REDUCTION; ALUMINA; PD/GAMMA-AL2O3;
D O I：
10.1016/S1872-2067(14)60214-X
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The close-coupled catalysts Pd/Al2O3 and Rh-Pd/Al2O3 were prepared by the impregnation method and characterized by H-2 temperature-programmed reduction, CO chemisorption, and X-ray photoelectron spectroscopy. Both overall catalytic activity and specific reactions associated with C3H8 elimination were assessed. The light-off temperature and complete conversion temperature decreased by 23 and 18 degrees C, respectively, upon addition of Rh to the Pd/Al2O3 catalyst. The addition of Rh promotes the catalytic activity during C3H8 reactions, particularly in the presence of NO. The introduction of Rh not only inhibits sintering of PdOx and increases the dispersion of these same species, but also changes the electronic state of the PdOx in the catalyst. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：229 / 236
页数：8
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