水热晶化法制备RhCeZrLaNdOx催化剂及其性能研究  

Study on Preparation of RhCeZrLaNdO_(x)Catalysts by Hydrothermal Crystallization and Their Performance

作　　者：朱敬芳 杨冬霞 于飞 常仕英 桓源峰 顾永万 潘再富[2] 赵云昆[1,2] ZHU Jing-fang;YANG Dong-xia;YU Fei;CHANG Shi-ying;HUAN Yuan-feng;GU Yong-wan;PAN Zai-fu;ZHAO Yun-kun(Kunming Sino-platinum Metals Catalyst Co.Ltd.,Kunming 650106,China;State Key Laboratory Advanced Technologies of Comprehensive Utilization of Platinum Metals,Kunming Institute of Precious Metals,Kunming 650106,China)

机构地区：[1]昆明贵研催化剂有限责任公司,昆明650106 [2]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,昆明650106

出　　处：《贵金属》2020年第4期1-7,共7页Precious Metals

基　　金：云南省应用基础研究计划项目青年项目(2017FD213);云南省科技计划项目创新引导与科技型企业培育计划(2018DC005)。

摘　　要：采用水热晶化法一步制备了RhCeZrLaNdO_(x)系列催化剂,测定其比表面积、储氧量和还原温度等性能参数,并进行结构和形貌表征,研究了制备过程中水热晶化温度和时间、表面活性剂等条件对催化剂性能、结构和形貌的影响。结果表明,以月桂酸作为表面活性剂,在160℃水热晶化4 h制备的催化剂具有较大的比表面积、较高的储氧量和较低的还原温度,微观结构为四方相的固溶体纳米颗粒。与传统浸渍法制备的Rh/CeZrLaNdO_(x)催化剂比较,水热晶化法制备的催化剂对CO还原NO具有更好的低温催化活性。A series of RhCeZrLaNdO_(x)catalysts were prepared by one-step hydrothermal crystallization method.The influence of hydrothermal crystallization time,temperature and the type of surfactant on physical and chemical properties of the catalysts was investigated by evaluating their specific surface area,oxygen storage capacity and reduction temperature.The results showed that the catalysts prepared at 160℃hydrothermal crystallization for 4 h and the lauric acid as surfactant had larger specific surface area,low reduction temperature,high oxygen storage capacity.The microstructure of the catalyst is solid solution nanoparticles with tetragonal phase.The catalytic activity of RhCeZrLaNdO_(x)for CO and NO was better than that of the traditional Rh/CeZrLaNdOx catalysts.

关 键 词：催化化学 汽车尾气 RhCeZrLaNdO_(x) 制备 催化活性 

分 类 号：O643.3[理学—物理化学] TQ426.96[理学—化学]