fig1

Figure 1. (A) XRD patterns of pristine 1T-dominant MoS₂ and Ni single-atom MoS₂; (B) Raman spectra of 1T-dominant MoS₂ and Ni single-atom MoS₂; (C) XPS spectra of Mo 3d; (D) XPS spectra of Ni 2p. XRD: X-ray diffraction; XPS: X-ray photoelectron spectroscopy.