RESEARCH / A0132
Atomically dispersed Cu O -Si bifunctional sites in ordered mesoporous silica for synergistic CO 2 -to C2+ electrosynthesis
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 2. Structural characterizations of Cu1/OM-SiO2, Cu1/DM-SiO2 and Cu1/S-SiO2 catalysts. (a) FT-IR spectra highlighting the bond structures in the catalysts. (b) Cu 2p XPS spectra of the catalysts. (c) O 1s and (d) Si 2p XPS spectra of Cu1/OM-SiO2. (e) Normalized Cu K-edge XANES spectra, (f) first-order derivatives of the XANES spectra, and (g) Cu K-edge FT-EXAFS spectra of the catalysts. (h) R-space of Cu K-edge EXAFS fitting curves and (i) Morlet wavelet transform contour plots for the k3-weighted EXAFS spectra of Cu1/OM-SiO2.
Figure 4. Structural characterizations of Cu1/OM-SiO2, Cu1/DM-SiO2 and Cu1/S-SiO2 catalysts after CO2RR. (a) Cu 2p XPS spectra, (b) Cu LMM Auger XPS spectra, (c) Normalized Cu K-edge XANES spectra and (d) Cu K-edge FT-EXAFS spectra of the catalysts after CO2RR. (e) Quasi in-situ Normalized Cu K-edge XANES spectra and (f) quasi in-situ Cu K-edge FT-EXAFS spectra of Cu1/OM-SiO2 catalyst under CO2RR condition.
Figure S11. R-space of Cu K-edge EXAFS fitting curves of Cu1/DM-SiO2 (a) and
Figure S12. Morlet wavelet transform contour plots for the k3-weighted EXAFS of