高比表面掺杂CeO_2纳米粉体的TPR研究

TPR study on doped CeO_2 nano powders with a high specific area

利用BET法对掺杂CeO2纳米粉体的比表面积进行了测试.结果表明,该种粉体具有良好的高温稳定性和抗烧结性 .利用程序升温还原法 (TPR)测试了掺杂CeO2 纳米粉体的催化特性 .Ce0 .8Sm0 .2 O1.9纳米粉体的催化转化温度与通常的铈锆体系相比降低了约 10 0℃ .

The effect of the calcining temperature on the specific area of the doped CeO_2 powders was measured by BET method.The results indicate that the powders possess an excellent high-temperature stability,the specific area of doped CeO_2 powders,calcined at 1000 ℃,is (66.682 m^2/g),and the average particle size of it is 13 nm.The investigation of the catalytic mechanism of Sm_2O_3 doped CeO_2 nano powders was conducted using the temperature program reduction (TPR) method.The reaction temperature of Ce_(0.8)Sm_(0.2)O_(1.9) has dropped to about 100 ℃ than CeO_2-ZrO_2 solid solution systems.