Fig. 2: Identifying nitrogen existence and phase transition of Fe2.5N during reaction.
From: Chemical looping synthesis of amines from N2 via iron nitride as a mediator
HR-TEM image of fresh (a) Fe2.5N and (b) spent Fe2.5N (32 h reaction), (c) XRD patterns and (d) XPS high-resolution N 1 s spectra of the fresh Fe2.5N, 2 h spent, 5 h spent, and 32 h spent Fe2.5N, (e) 57Fe-Mössbauer spectra of fresh, 2 h spent, 5 h spent and 32 h spent Fe2.5N obtained at 298 K (f) Fe K-edge XANES spectra and FT-EXAFS spectra of fresh Fe2.5N, reference FeO, and reference Fe foil.
