Enhanced properties of Pd/CeO2-nanorods modified with alkaline-earth metals for catalytic oxidation of low-concentration methane

被引：8
作者：
Guo, Tianyu [1 ,2 ]
Nie, Xiaorong [3 ]
Du, Jianping [2 ,3 ]
Li, Jinping [2 ,4 ]
机构：
[1] Taiyuan Univ Technol, Coll Environm Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China
[2] Shanxi Key Lab Gas Energy Efficient & Clean Utili, Taiyuan 030024, Shanxi, Peoples R China
[3] Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Shanxi, Peoples R China
[4] Taiyuan Univ Technol, Res Inst Special Chem, Taiyuan 030024, Shanxi, Peoples R China
来源：
RSC ADVANCES | 2018年 / 8卷 / 67期
基金：
中国国家自然科学基金;
关键词：
OXYGEN STORAGE CAPACITY; VENTILATION AIR METHANE; SULFUR-DIOXIDE; PD CATALYSTS; MIXED OXIDES; PERFORMANCE; CO;
D O I：
10.1039/c8ra07797e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of Pd/CeO2-nanorods catalysts modified with alkaline-earth metals were prepared by the incipient impregnation method. Their catalytic properties in low-concentration methane oxidation were also investigated. The catalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and H-2-temperature-programmed reduction techniques. The catalytic results show that the Ca element doped in Pd/CeO2, with optimum molar ratio of Pd to Ca of 2 and calcination temperature of 450 degrees C, improved the properties of the Pd-based catalyst remarkably, which is attributed to strong Pd-support interaction and high oxygen mobility. Therefore, calcium is more suitable as a promoter for enhancing the activities of the Pd/CeO2 catalyst in methane oxidation.
引用
收藏
页码：38641 / 38647
页数：7
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