Active Sites of the Selective Catalytic Reduction of NO by NH3 over Fe-ZSM-5: Combining Reaction Kinetics with Postcatalytic Mössbauer Spectroscopy at Cryogenic Temperatures

Abstract

57Fe-ZSM-5 catalysts were prepared by solid-state ion exchange of 57FeCl3 into H-ZSM-5, the exchange capacity of which had been blocked by Na+ or Ca2+ to ≈50, ≈25, and 0%. Their Fe site structure w...