Fig. 3. Structural and electronic properties of the Co/Se-doped MoS₂ nanofoam (Co/Se-MoS₂-NF).

a HAADF-STEM image and corresponding EDX mappings of the Co/Se-MoS₂-NF. b Atomic-resolution HAADF-STEM image of the Co/Se-MoS₂-NF. c Enlarged and simulated images of the white dashed line region in b and the EELS spectra obtained at the site A and B via line scan. d Low pass filtered large area atomic-resolution HAADF-STEM image of the Co/Se-MoS₂-NF. e Enlarged and simulated images of the white dashed line in d. f The measured intensity profile along three lines labeled in e. g Co K-edge k³-weighted EXAFS spectra of Co/Se-MoS₂-NF sample in comparison with CoS, Co₃O₄, and Co foil, respectively. Mo K-edge k³-weighted EXAFS spectra (h) and S L-edge total electron yield X-ray absorption spectra (i) of Co/Se-MoS₂-NF sample compared with Co-MoS₂-NF, Se-MoS₂-NF, and MoS₂-NF. The Co/Se-MoS₂-NF sample with 10.4% Co-doping content in atomic percentage was employed in these series of characterizations.