近几年来,用X射线衍射、电子显微镜、红外光谱等方法对负载型金属催化剂进行了广泛的研究.但这些方法往往只能对已制备好的催化剂进行研究,而无法了解催化剂在还原活化过程中所发生的变化.事实上,这些变化对催化剂的性能关系很大. 在程序升温脱附(TPD)基础上发展起来的程序升温还原(TPR)则可以提供 In recent years, the supported metal catalysts have been extensively studied by X-ray diffraction, electron microscopy, infrared spectroscopy, etc. However, these methods often can only study the prepared catalysts, but can not understand the catalyst during the reduction and activation process In fact, these changes have a great influence on the performance of the catalyst, and programmed temperature-programmed reduction (TPR) based on temperature programmed desorption (TPD)