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| Preparation and Application of Oxygen Storage Material of Ce-Zr Solid Solution Modified by Pr and La |
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Received:January 07, 2014
Revised:January 21, 2014
Accepted:January 22, 2014
Published Online:June 23, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.07.017 |
| KeyWord:cocurrent flows coprecipitation; oxygen storage materials; specific surface area; aging; light-off temperature |
| Author | Institution |
| SU Zheng-fu |
湖南稀土金属材料研究院 |
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| Abstract: |
| Oxygen storage materials of Ce-Zr solid solution modified by Pr and La were prepared by cocurrent flows coprecipitation. Its microstructure was characterized. The results show that fluorite structure of cubic solid solution be-fore and after aging in modified oxygen storage materials which have strong aging resistance. The fresh specific surface area of doping Pr and La enlarges from 65.25 m2/g to 112 m2/g and it enlarges from 22.56 m2/g to 39.78 m2/g after be-ing aged for 4 h at 1 000 ℃. The particle size is 0.7~9.6 μm and most is smaller than 7 μm. The light-off temperature and full-conversion temperature of fresh three-way catalyst for CO, C3H6 and NO drop by 10% above. |
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