描述前处理
Prior to the TPD measurements, the catalysts (about 500 mg) were pretreated in a way similar to that described for TPR experiments.
描述NO吸附
The adsorption of NO was performed at room temperature by flowing 50 ml/min of NO (0.8 vol%)/He for 2 h.
描述去除物理吸附
The catalyst was then flushed with helium (50 ml/min) at room temperature to remove all the physically adsorbed species.
描述开始测试了
The TPD experiments were then carried out from room temperature to 700 °C, at 10 °C/min, under He flow.
描述尾气分析
The gases desorbing from the catalysts were analyzed using a chemiluminescence gas analyzer (ML9841AS, Monitor Labs, Inc.).
