Time resolved dispersive XAFS (DXAFS) is a useful method to elucidate changing structures and is applicable to investigate the structures of short living species during chemical reactions. We applied this method to the chemical study of catalysts preparation. Recent results of our DXAFS study on the reduction process of Cu-ZSM−5 and on the decarbonylation of Mo(CO)6 in the cages of Y-type zeolite are describe in this article as well as a brief description of DXAFS measurement and DXAFS data analysis.
