Abstract
The importance of Mössbauer Spectroscopy in heterogeneous catalysis research is increasing, since more and more catalysts are complex finely dispersed solids, sufficient characterization cannot be achieved easily with more conventional methods. After summarizing the special features of Mössbauer Spectroscopy of solid catalysts, we show and discuss some examples of its use in identifying catalytically active phases, in studying adsorption phenomena, and reaction mechanisms. Questions that remain and perspectives given by Mössbauer spectroscopy in heterogeneous catalysis research are presented (*)