Formation of an icosahedral phase in ion-irradiated Fe/Cu multilayers

Fe–Cu Bimetallic Catalysts for Selective CO2 Hydrogenation to Olefin-Rich C2+ Hydrocarbons

“…Multiple peaks superimpose in this shoulder. After deconvolution (Figure c), a new peak around 2θ = 45° with d -spacing = 2.01–2.02 Å is observed, which is ascribed to Fe–Cu alloy species. − The Bragg angles corresponding to Fe(0.75)­Cu(0.25), Fe(0.7)­Cu(0.3), Fe(0.6)­Cu(0.4), and Fe(0.5)­Cu(0.5) are so close that they cannot be distinguished at this stage. Furthermore, a small shoulder also appears in the reduced Fe–Cu(0.5)/Al 2 O 3 at 44.4° (Figure d), but no distinct Fe–Cu alloy peak shows up even after deconvolution (Figure d).…”