应用化学2012，Vol.29Issue(11)：1297-1301,5.DOI:10.3724/SP.J.1095.2012.20001
合成方法对纳米Ce-Zr-Al高温稳定性及储氧性能的影响
Effect of Synthetic Method on Thermal Stability and Oxygen Storage Capacity of Ce-Zr-Al Nanocomposite
摘要
Abstract
CeO2-ZrO2 solid solution is an indispensable oxygen storage material for the three way catalyst to control the pollution gas emission from automobiles. In this paper, three series of Ce-Zr-Al nanocomposite (ACZ) was prepared by citrate acid sol-gel method, sol assistant co-precipitation and sol co-precipitation, respectively. The obtained samples were calcinated at 1000 t for 4 h to test the thermal stability and oxygen storage capacity ( OSC). The effect of synthetic methods on these properties was investigated by means of X-ray diffraction ( XRD ) , Brunauer Emmett Teller ( BET) specific surface area ( SSA ) and H2 temperature-programmed reduction ( H2 -TPR). The results revealed that the thermal stability and oxygen storage capacity of all the ACZ were improved compared to the pure CeO2-ZrO2 solid solution. The molar proportion of Al doped in ACZ is 5, 10, 5 for citrate acid sol-gel method, sol assistant co-precipitation and sol co-precipitation, respectively. ACZ prepared by citrate acid sol-gel method had the highest oxygen storage capacity (717. 5 μmol/g-CeO2) , account for 49. 3% of the theoretical maximum.关键词
铈锆固溶体/纳米复合体/热稳定性/溶胶凝胶法/储氧量Key words
Ce-Zr solid solution/ nanocomposite/ thermal stability/ sol-gel method/ oxygen storage capacity分类
化学化工引用本文复制引用
陈去非,潘喜强,赵振波,杨向光..合成方法对纳米Ce-Zr-Al高温稳定性及储氧性能的影响[J].应用化学,2012,29(11):1297-1301,5.基金项目
国家高技术研究发展计划(863计划,2011AA03A406) （863计划,2011AA03A406）
