无机材料学报2017，Vol.32Issue(3)：331-336,6.DOI:10.15541/jim20160288
改进共沉淀法以提高三效催化剂中铈锆复合氧化物的热稳定性
Preparation of Ceria-zirconia Mixed Oxides with Improved Thermal Stability for Three-way Catalysts by a Modified Co-precipitation Method
摘要
Abstract
A series of ceria-zirconia mixed oxides (CZ-x;x=0, 20, 40 and 80) with Ce/Zr molar ratio of 3/2 were syn-thesized by co-precipitation method. In order to improve the thermal stability of ceria-zirconia mixed oxides, we ex-tended the time for the primary grain to grow up by a modified synthesis reactor. The resulting samples were charac-terized by X-ray diffraction (XRD), N2 adsorption-desorption, and transmission electron microscopy (TEM). The re-sults revealed that bigger grain could be obtained by extending time for the primary grain to grow up, which was pro-pitious to enhance the textural properties and structural properties of the materials. Thus, the thermal stability of the materials was improved. In this study, the materials were applied in the field of Pd-only three way catalysts (TWCs). The catalysts exhibited excellent catalytic performance and thermostability, showing better prospect in application.关键词
铈锆材料/初始晶粒/共沉淀法/热稳定性Key words
ceria-zirconia composites/primary grain/co-precipitation/thermostability分类
化学化工引用本文复制引用
伍青峰,崔亚娟,张海龙,周怡,兰丽,王健礼,陈耀强..改进共沉淀法以提高三效催化剂中铈锆复合氧化物的热稳定性[J].无机材料学报,2017,32(3):331-336,6.基金项目
National Natural Science Foundation Project of China (21173153) （21173153）
National Hi-tech Research and Development Program of China (863, 2015AA034603) （863, 2015AA034603）
