Effects of ceria/zirconia ratio on properties of mixed CeO2-ZrO2-Al2O3 compound
来源期刊：Journal of Rare Earths2010年第1期
论文作者：李红梅 祝清超 李移乐 龚茂初 陈永东 王健礼 陈耀强
文章页码：79 - 83
摘 要：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 higher specific surface area（212 m2/g） and larger pore volume（0.40 ml/g）.For all aged samples,CZA with Ce/Zr molar ratio 3/7 presented the highest specific surface area（104 m2/g） and pore volume（0.34 ml/g）.The compounds could still keep prominent structural and textural stability with excellent redox properties even calcined at 1000 oC.
李红梅，祝清超，李移乐，龚茂初，陈永东，王健礼，陈耀强
Key Laboratory of Green Chemistry & Technology Ministry of Education,College of Chemistry,Sichuan University
摘 要：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 higher specific surface area（212 m2/g） and larger pore volume（0.40 ml/g）.For all aged samples,CZA with Ce/Zr molar ratio 3/7 presented the highest specific surface area（104 m2/g） and pore volume（0.34 ml/g）.The compounds could still keep prominent structural and textural stability with excellent redox properties even calcined at 1000 oC.
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