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

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

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 result...

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Veröffentlicht in:Journal of rare earths 2010, Vol.28 (1), p.79-83
1. Verfasser: 李红梅 祝清超 李移乐 龚茂初 陈永东 王健礼 陈耀强
Format: Artikel
Sprache:eng
Schlagworte:
Ce atom utilization ratio
co-precipitation
oxygen storage capacity (OSC)
oxygen storage material
rare earths
thermal stability
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Zusammenfassung: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...
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(09)60055-7