Fig. 2: Composition and morphology characterizations of AlP-MoO2@Mo2C materials.
From: Termination-acidity tailoring of molybdenum carbides for alkaline hydrogen evolution reaction
a Schematic illustration of the synthesis of AlP-MoO2@Mo2C. b XRD patterns and c Raman spectra of AlP-MoO2@Mo2C and MoO2@Mo2C. d SEM image of AlP-MoO2@Mo2C micro-size spheres. e Cross-sectional TEM image of AlP-MoO2@Mo2C sample, where the upper Pt and C protective layers and underlying Si matrix are marked, respectively. f Low-magnification STEM image of an AlP-MoO2@Mo2C micro-size sphere consisting of numerous small nanoparticles. g High-magnification STEM image of crystallized Mo2C and amorphous MoO2 terminations, with the interfaces highlighted by yellow dashed lines. h STEM-EDS mapping of C, O, Al, and Mo elements on the cross-sectional morphology of AlP-MoO2@Mo2C sample (C: yellow, O: red, Al: orange, Mo: blue).
