RESEARCH / A0089
CO Adsorption Energy Match at Dual Sites Drives C–C Coupling Activity in Rare Earth–Cu CO2 Reduction Catalysts
Read the original paper · 10.1002/smll.73888 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
FIGURE 4 Morphology and structural characterization of Yb@Cu-2 during reaction. (a) In situ Cu K-edge XANES spectra of Yb@Cu-2 at all working potential. (b) Cu K-edge Fourier transform EXAFS spectra. (c) Wavelet transform images of EXAFS data with optimized Morlet parameter (i.e., κ = 5, σ = 1) at Cu K-edge for Yb@Cu-2, Cu-foil, Cu2O and CuO. (d) and (e) XPS of Yb@Cu-2 (Cu 2p1/2, Cu 2p3/2) after different working potential. (f) XRD of Yb@Cu-2 after reaction. (g) SEM image of Yb@Cu-2 after reaction. (h) AC-HAADF-STEM image of Yb@Cu-2 at 1 nm after reaction.