期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 189, 期 1-2, 页码 150-157出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2011.02.012
关键词
Ce(0.2)Zr(0.8)O(2); Neodymia; Oxygen storage capacity; Thermal stability; Pd-only three-way catalyst
资金
- Ministry of Science and Technology of China [2009AA064804]
- Science and Technology Department of Zhejiang Province [2009R50020]
A series of ceria-zirconia-neodymia mixed oxides with different contents of neodymia and the supported Pd-only three-way catalysts before and after aging have been prepared and characterized. The influence of Nd doping on the structural/textural properties of ceria-zirconia (CZ) and the effect on the three-way catalytic performance are also investigated. The results demonstrate that the addition of neodymia results in the formation of ceria-zirconia-neodymia ternary solid solution (CZN) with better textural and structural properties as well as improved reducibility and redox behavior, leading to the promoted three-way catalytic activity and enlarged air/fuel operation window. The modified solid solution with 5 wt.% neodymia shows the preferable textural/structural properties considering that the capacity of foreign cation is limited in the crystal lattice of ceria-zirconia solid solution, and Pd/CZN5 shows the optimum three-way catalytic performance and wider air/fuel operation window, especially for the corresponding aged one. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
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