In Situ FT‐IR Studies on Catalytic Nature of Iron Nitride: Identification of the N Active Site

Not only aliens probe: Iron nitride plays an important role in many catalytic processes, such as Haber–Bosch process, for which knowledge of surface catalytic properties is vital. By using FTIR spectroscopic techniques, this work describes the surface active sites of iron nitride/fumed SiO2 by coupled with CO, NH3, and H2 as probe- molecules. Interestingly, the chemically active N site is observed in addition to Fe site.