CeO_2-ZrO_2-Al_2O_3材料的制备及其单钯催化剂性能的研究  

Preparation of CeO_2-ZrO_2-Al_2O_3 Materials and Catalytic Performance of Only-Pd Catalyst

作　　者：郭晶[1,2] 朱敬芳 何洁丽 杨冬霞 李翔[1] 赵云昆[1,2] 

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,云南昆明650106 [2]昆明贵研催化剂有限责任公司贵金属催化技术与应用国家地方联合工程实验室,云南昆明650106 [3]云南大理学院药学与化学学院,云南大理671000

出　　处：《中国稀土学报》2015年第5期542-549,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21463015;21403096)资助

摘　　要：采用水热晶化法制备了Ce O2-Zr O2-Al2O3储氧材料,详细考察了制备过程中水热时间和温度对储氧材料结构和性能的影响。X射线衍射(XRD)、N2物理吸附、H2程序升温还原(H2-TPR)和热重分析技术(TG)表征结果表明,当水热温度为100℃,水热时间为12 h时,制备的Ce O2-Zr O2-Al2O3材料具有优异的结构性能、织构性能、还原性能和储氧性能。分别以较优水热条件下制备的Ce O2-Zr O2-Al2O3储氧材料和商用的铈锆铝储氧材料为载体,制备Pd/Ce O2-Zr O2-Al2O3催化剂,考察了其对汽车尾气中碳氢化合物的催化转化能力。The CeO2-ZrO2-Al2O3 oxygen storage material was prepared by hydrothermal crystallization method. The influence of hydrothermal crystallization time and temperature on structure and performance of the materials was in- vestigated in detail. The results of X-ray diffraction, N2 adsorption, HE temperature-programmed reduction and thermogravimetry showed that the material prepared by hydrothermal crystallization conditions at 100 ℃ for 12 h owned excellent structure properties, textural properties, reduction performance and oxygen storage capacity. The Pd/ CeO2 -ZrO2-Al2O3 catalysts were prepared with the CeO2-ZrO2-Al2O3 fabricated under the optimal hydrothermal crystallization conditions and commercial CeO2-ZrO2-Al2O3, respectively. Then, the catalytic performance of C3H6, C3H8 and CH4 elimination in a simulative automobile exhaust gas over the Pd/CeO2-ZrO2-Al2O3 catalysts were studied.

关 键 词：铈锆铝复合氧化物 水热晶化法 储氧材料 单Pd催化剂 

分 类 号：O614.33[理学—无机化学] TQ133.3[理学—化学]