Simultaneous Presence of Two Catalytic Sites in all Fe-Based Catalysts

Simultaneous Presence of Two Catalytic Sites in all Fe-Based Catalysts 

If the Nls XPS spectra of Fe-based catalysts revealed a specific interaction in the high-temperature catalytic site between pyridinic-type nitrogen atoms and the Fe ion, ToF SIMS experiments performed on similar catalysts revealed that  

Besides FeN2C4+, other ions of the type FeNjcCy were also detected in the ToF SIMS spectra of these catalysts. They were of much lower relative abundance than FeN2C4 . A refined analysis of the ToF SIMS spectra took them into 

These results influenced the choice of the iron precursor and also the structures for the catalytic site proposed later by other groups. Indeed, Bron and his 

Influence of the Carbon Support on the Surface Density of Catalytic Sites 

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