In Situ Atomic-Scale Probing of the Reduction Dynamics of Two-Dimensional Fe₂O₃ Nanostructures.

ABSTRACT: Atomic-scale structural dynamics and phase transformation pathways were probed, in situ, during the hydrogen-induced reduction of Fe₂O₃ nanostructure bicrystals using an environmental transmission electron microscope. Reduction commenced with the α-Fe₂O₃ → γ-Fe₂O₃ phase transformation of one part of the bicrystal, resulting in the formation of a two-phase structure of α-Fe₂O₃ and γ-Fe₂O₃. The progression of the phase transformation into the other half of the bicrystalline Fe₂O₃ across the bicrystalline boundary led to the formation of a single-crystal phase of γ-Fe₂O₃ with concomitant oxygen-vacancy ordering on every third {422} plane, fo

SUBMITTER: Zhu W 

PROVIDER: S-EPMC5541388 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature