RESEARCH / A0194
La‐Promoted Conversion of Reaction Intermediates Over H3BTC‐Modified ZrOX Cu Catalysts
Read the original paper · 10.1002/adfm.202530826 ↗
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 (a) Raman spectra of the CLZ-X catalysts (including the untreated sample CLZ-0); (b) XRD patterns of the CLZ-X catalysts; (c) Cu K-edge XANES spectra of CLZ-0 (including the untreated sample), CLZ-1 and corresponding standard samples; (d) Fourier transform of the Cu K-edge EXAFS spectra for Cu foil, Cu2O, CuO, CLZ-0 (including the untreated sample), CLZ-1 and experimental data (scattered dots) and fitting of k3-weighted EXAFS data for CLZ-0 (including the untreated sample) and CLZ-1 in the region of 1.0–3.0 Å.
FIGURE 5 Cu K-edge XANES spectra of (a) CLZ-0 (b) CLZ-1 and corresponding standard samples; (c) Fourier transform (FT) of the Cu K-edge EXAFS spectra for Cu foil, Cu2O, CuO, CLZ-0, and CLZ-1, experimental data (scattered dots) and fitting of k3-weighted EXAFS data (colored solid lines) for CLZ-0 and CLZ-1 in the region of 1.0–3.0 Å. The in situ XAS test condition: the samples were pretreated with pure H2. The data were recorded for CLZ-0 (H2) and CLZ-1 (H2) at 270◦C. Then mixed gas (H2:CO2 = 3:1) was introduced at 1 MPa at 270◦C and the data were collected for CLZ-0 (H2 + CO2) and CLZ-1 (H2 + CO2); (d) CO2-TPD profiles of the reduced CLZ-X catalysts.