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| 纯CeO2 在氧化还原过程中，会因表面微孔被堵塞而造成氧化还原能力剧减，尤其在高温850℃以上，CeO2容易烧结并与γ-Al 2O3相互作用形成钙钛矿结构的CeAlO 3 ，使储氧能力降低，严重影响催化剂对氧化还原反应的催化性能，甚至可能导致催化剂活性的丧失。 |
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ypfkb(金币+2):谢谢参与
ypfkb(金币+2,VIP+0):谢谢 8-18 17:00
ypfkb(金币+2):谢谢参与
ypfkb(金币+2,VIP+0):谢谢 8-18 17:00
| The redox ability of pure CeO2 could be reduced abruptly during redox process due to the obstruction of micropores on its surface. Especially at temperatures above 850 C, CeO2 tends to be sintered and react with r-Al2O3 to form perovskite-structured CeAlO3, resulting in a reduction in oxygen storage. This would therefore seriously influence, even cause the loss of the catalytic properties of catalyst (CeO2?? not so clear for me) on redox reactions |
2楼2009-08-18 16:50:34
wangwei2008
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3楼2009-08-18 17:45:56
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