Fig. 1: Structure/morphology.

a Schematic temperature-dependent surface reconstruction. TEM images of (b) In₂O₃ and (c) In-Em In₂O₃. d HRTEM image of In-Em In₂O₃. AFM images of (e) In-Em In₂O₃ and f In₂O₃ with metallic In nanoparticles loaded on the surface (Inset: the height along the blue line). g Scheme of three types of oxygen defects.