Fig. 4: Spectroscopic characterizations of Ni/Yb2O3 hybrid.
From: Bixbyite-type Ln2O3 as promoters of metallic Ni for alkaline electrocatalytic hydrogen evolution
a Ni K-edge XANES spectra of Ni/Yb2O3, pristine Ni, and Ni foil reference. b, c Fourier transforms and wavelet transforms of EXAFS spectra for Ni/Yb2O3 and pristine Ni. d Yb L-edge XANES spectra of Ni/Yb2O3 and pristine Yb2O3. e, f Fourier transforms and wavelet transforms of EXAFS spectra for Ni/Yb2O3 and pristine Yb2O3. g Ni 2p XPS spectra of Ni/Yb2O3 and pristine Ni. h Yb 4d XPS spectra of Ni/Yb2O3 and pristine Yb2O3.
