Effects of ceria/zirconia ratio on properties of mixed CeO_2-ZrO_2-Al_2O_3 compound

• Published in: Journal of rare earths Vol. 28; no. 1; pp. 79 - 83
• Main Author: 李红梅 祝清超 李移乐 龚茂初 陈永东 王健礼 陈耀强
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2010; Key Laboratory of Green Chemistry & Technology Ministry of Education,College of Chemistry,Sichuan University,Chengdu 610064,China
• Subjects: Ce atom utilization ratio; co-precipitation; oxygen storage capacity (OSC); oxygen storage material; rare earths; thermal stability; co-precipitation; Ce atom utilization ratio; thermal stability; oxygen storage capacity (OSC); oxygen storage material; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(09)60055-7

A series of CexZr0.50-xAl0.50O1.75(0.05≤x≤0.45) mixed oxides with different Ce/Zr ratio were prepared by co-precipitation method and characterized by means of X-ray diffraction(XRD),Brunauer-Emmet Teller method(BET),temperature-programmed reduction(H2-TPR) and oxygen pulsing technique.The XRD results showed that all samples kept the single CeO2 cubic fluorite structure after calcination at 600 and 1000 oC for 5 h.The results of BET revealed that CexZr0.50-xAl0.50O1.75 with Ce/Zr molar ratio 1/1 exhibited hi...