Fig. 5

X-ray photoelectron spectroscopy analyses. a–c High-resolution XPS spectra of C 1s (a), Mo 3d (b), and Mo 3p + N 1s (c) of the MoS₂/NC heteroaerogels. d–f High-resolution XPS spectra of C 1s (d), Mo 3d (e), and O 1s (f) of the MoS₂/C heteroaerogels