摘要
利用ＴＰ－ＩＲ动态方法研究了ＣＯ和ＮＯ在Ｒｈ／Ａｌ２Ｏ３上的吸附性能和相互作用的动态行为．结果表明，Ｒｈ／Ａｌ２Ｏ３的孪生中心对ＣＯ的吸附强于对ＮＯ的吸附，线式和桥式中心则对ＮＯ的吸附强于对ＣＯ的吸附．ＣＯ和ＮＯ共吸附－ＴＰ（ＣＯ和ＮＯ中）－ＩＲ动态过程结果揭示出２２２４ｃｍ－１谱带的出现和强度的增加与孪生ＣＯ谱带以及吸附的ＮＯ谱带的强度减弱同时发生，表明是由吸附的ＮＯ和孪生ＣＯ形成了Ｒｈ－ＮＣＯ．
Adsorption and interaction of CO and NO on Rh/Al 2O 3 have been investigated by TP IR dynamic method. The results obtained indicate that adsorption of CO is stronger than that of NO on gem dicarbonyl site and adsorption of NO is stronger than that of CO on linear and bridged site over Rh/Al 2O 3. The results of dynamic process of coadsorption of CO and NO TP (in CO and NO) reveal that the appearance of band at 2224 cm -1 and decrease in intensity of gem dicarbonyl CO bands and bands of adsorbed NO simultaneously occur, indicating that interaction between gem dicarbonyl CO and NO adsorbed is necessary for Rh-NCO production.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第4期275-278,共4页
基金
国家自然科学基金
中国科学院大连化学物理研究所催化基础国家重点实验室基金
关键词
负载型
一氧化碳
一氧化氮
化学吸附
铑催化剂
Rhodium, Alumina, Supported catalyst, Carbon monoxide, Nitric oxide, Chemical adsorption, Interaction, Surface intermediate
