Fig. 2
From: Single atom tungsten doped ultrathin α-Ni(OH)2 for enhanced electrocatalytic water oxidation
Physicochemical property characterization. a XRD patterns of the reference Ni(OH)2-r, w-Ni(OH)2-e, and w-Ni(OH)2 samples; b UV–Vis absorption spectrum; c The W K-edge XANES spectra, and d the corresponding K2-weighted Fourier transform spectra of w-Ni(OH)2, WO3, and W powder were used as the reference samples
