fig1

Figure 1. In-situ transformation from MoO₂ to Mo₂C. (A-D) In-situ TEM images of the Mo₂C formation from MoO₂ in 20 vol.% CH₄/H₂ atmosphere; (E) The corresponding SAED patterns of MoO₂ (A) and Mo₂C (D); (F) Intensity profiles from the integration of diffraction rings of SAED patterns in E (a.u., arbitrary units); (G) Unit cells of MoO₂ and Mo₂C; (H) The histogram of cell volume and volume per Mo of MoO₂ and Mo₂C. Mo: Molybdenum; SAED: selected area electron diffraction; TEM: transmission electron microscopy.