RESEARCH / A0178
Enhancement of Methanol Yield in CO2 Hydrogenation by Promoting CO2 Activation and Unlocking the RWGS + CO-Hydrogenation Pathway over Cu–La/ZrOX Catalysts
Read the original paper · 10.1021/acscatal.5c08427 ↗
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. Cu K-edge XANES spectra of (a) CLZ-0 and (b) CLZ-3 and corresponding standard samples; (c) H2-TPR profiles of the catalysts; and (d) Zr K-edge XANES spectra of CLZ-0 and corresponding standard samples.
Figure 5. (a) Fourier transform (FT) of the Cu K-edge EXAFS spectra for Cu Foil, Cu2O, CuO, CLZ-0, and CLZ-3 and experimental data (scattered dots) and fitting of k2-weighted EXAFS data (colored solid lines) for CLZ-0 and CLZ-3 in the region of 1.0−3.0 Å. (b) The WT spectra of CLZ-0, CLZ-3, and corresponding standard samples. The in situ XAS test condition: the sample was pretreated with pure H2 at 300 °C for 2 h and cooled down to 250 °C and then treated in mixed gas (H2/CO2 = 3:1) at 1 MPa at 250 °C. (c) H2-TPD profiles of the catalysts and (d) CO2- TPD profiles of the catalysts.