Fig. 3: XAS fine structures of the fresh and the used SFe-Ni catalysts.
From: Grave-to-cradle upcycling of Ni from electroplating wastewater to photothermal CO2 catalysis
a Ni K-edge XANES spectra of the fresh and used SFe-Ni catalyst, exhibiting the normalized absorption intensity as a function of the X-ray photon energy. The used catalyst is denoted as SFe-Ni (after). Ni foil and NiO were used as references. b Ni K-edge EXAFS fitting results of the fresh and used SFe-Ni catalyst. The black open circles show the original data of the EXAFS spectra, while the lines of other colors are the fitting results of the spectra.
