Fig. 4: The XPS spectra of CoO-Mo2N heterojunctions.
From: CoO-Mo2N hollow heterostructure for high-efficiency electrocatalytic hydrogen evolution reaction
The high-resolution XPS spectra of (a) Co 2p, (b) Mo 3d, (c) O 1s and (d) N 1s for hollow CoO-Mo2N heterojunctions.
