摘要
用ＴＰＤ、ＴＰＳＲ和ＣＯ氧化活性测定等技术研究了ＣＯ在Ｐｔ／Ａｌ２Ｏ３和含有ＺｒＯ２的样品上的吸脱附行为、表面反应及催化氧化活性。结果表明，在Ｐｔ／Ａｌ２Ｏ３中浸渍法添加ＺｒＯ２或掺杂ＺｒＯ２后，催化剂的氧化活性均明显提高；ＣＯ－ＴＰＳＲ的实验结果表明，程序升温脱附过程中ＣＯ在氧化态Ｐｔ催化剂上与催化剂的表面氧发生氧化反应，而在还原态Ｐｔ催化剂上主要发生歧化反应；并发现在ＣＯ－ＴＰＳＲ过程中程脱物ＣＯ２的脱附量及脱附峰温次序与对ＣＯ的催化氧化活性也有一致的对应关系。
Adsorption-desorption behaviour, surface reaction and catalytic oxidation activity of CO on the Pt/ZrO2-Al2O3 have been investigated by TPD-MS and TPSR-MS techniques.It was shown that adding ZrO2 would remarkably increase CO oxidation activity of Pt/Al2O3. In TPD and TPSR of CO, it was found that the desorbed amount of CO2 and the peak temperature follow the same order as their activities.
基金
浙江省教委基金
