Fig. 5: Structural evolution of Na-HE LDH during the OER process.
From: Engineering oxygen nonbonding states in high entropy hydroxides for scalable water oxidation
In-situ Raman spectra and the corresponding contour plots of the in-situ Raman spectra for a, b HE LDH and c, d Na-HE LDH. e δ(Ni–O) to ν(Ni–O) ratios in electrochemical in-situ Raman spectra of Na-HE LDH and HE LDH related to the operated potentials (Normalized by the respective open-circuit voltage). f In-situ Ni k-edge XANES spectra of HE LDH. g Changes in the normalized absorbance of 3d transitional elements in the in-situ k-edge XANES spectra of HE LDH. h Fourier transforms of operando Ni k-edge EXAFS spectra of HE LDH, R is the radial distance. i In-situ Ni k-edge XANES spectra of Na-HE LDH. j Changes in the normalized absorbance of 3 d transitional elements in the in-situ k-edge XANES spectra of Na-HE LDH. k Fourier transforms of operando Ni k-edge EXAFS spectra of Na-HE LDH, R is the radial distance. Source data are provided as a Source Data file.
