Fig. 2: Structural characterization.
From: Lanthanide single-atom catalysts for efficient CO2-to-CO electroreduction
a HRTEM image for Er SAC. b AC HAADF-STEM images of Ln SACs. Scale bar, 2 nm. c XANES spectra of C K-edge. d XANES spectra of N K-edge. e Er L3-edge XANES spectra of Er foil, Er2O3 and Er SAC. f k3 weighted Fourier transform spectra of Er foil, Er2O3 and Er SAC. g the corresponding EXAFS R space fitting curves for Er SAC.
