文献类型：期刊文献

中文题名：氧化共沉淀法制备纳米级铈锆固溶体

英文题名：Nanocrystal Ceria-Zirconia Solid Solution Prepared by Oxidation-Coprecipitation Method

作者：张顺海[1];蒋平平[1];郭耘[1];郭杨龙[1];王筠松[1];吴东方[1];卢冠忠[1]

机构：[1]华东理工大学工业催化研究所,上海200237

年份：2003

卷号：21

期号：Z2

起止页码：64

中文期刊名：中国稀土学报

外文期刊名：Journal of the Chinese Society of Rare Earths

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：上海市科技发展基金项目(033012001);上海市科委纳米专项(0123nm025)

语种：中文

中文关键词：铈锆固溶体;氧化共沉淀法;程序升温还原;稀土

外文关键词：ceria-zirconia solid solution; oxidation-coprecipitation; TPR; rare earths

摘要：采用改进的氧化共沉淀法制备了Ce0.5Zr0.5O2固溶体,利用XRD和BET测定了其结构和比表面积。采用H2的程序升温还原(TPR)研究铈锆固溶体的还原特性,以考察它的低温还原特性。改进的氧化共沉淀法制备的铈锆固溶体在550℃可形成立方相固溶体,具有较大的比表面积和较小的晶粒度,同时还具有良好的低温还原特性和较高的热稳定性,经900℃焙烧6h后比表面积达到34.37m2·g-1。
Nanocrystal Ce_(0.5)Zr_(0.5)O_2 solid solution was prepared by a novel oxidation-coprecipitation method. The structure of products were characterized by XRD and BET surface area. The reduction features of the ceria-zirconia solid solution were measured by temperature-programmed reduction(TPR). The cubic ceria-zirconia solid solution formed at 550 ℃ showed large specific surface area, small crystallite size and low reduction temperature. The samples exhibited better thermal stability, and maintained surface area of 34.37 m^2·g^(-1) after calcining at 900 ℃ for 6 h.