41). Upon introducing CO2 to a pre-activated Pt/TiNxOy-8 h surface in hydrogen atmosphere, a peak at 1362 cm–1 assigned to NH2 was observed. Additionally, a broad adsorption band in the range of 2930–3320 cm–1 attributed to NH2 stretching vibration also appeared. The intensity of...
Figure 4. X-ray absorption analysis. a, Normalized Zn K-edge XANES spectra. b, Corresponding EXAFS spectra (open dots) and their fitting results (solid lines) in R-space. Dashed lines indicate the peak position of Zn-ligand first shell for MOF-Zn-inf-10c and MOF-Zn-inf-60c. c, Corre...
In particular, the K30-Ni/Ce sample showed a wide peak between the α and the β region and a high temperature desorption peak centred at about 455 °C (strong basic site). The presence of too weak and too strong basic sites can explain the low photothermo-catalytic activity of the K...
ca. 18 h prior to the acquisition in Fig. 5. (a) Measured ranges per heading. (b) Total path averaged CO2 concentrations. (c) Average in-plume CO2 concentrations. The heading of the peak near 9.5° corresponds to 35° in Fig. 5. Full size image CO2 fluxes Our CO2 path-amount ...
evidencing the single-atom state of Co species instead of metallic Co nanoparticles or clusters. The EXAFS data fitting results indicate the main peak is at about 2.0 Å, which value is close to the Co-O bond length of CoO (Fig.3fand Supplementary Table2)27,28. In addition, the coordin...
Furthermore, in-situ Fourier transform infrared (FTIR) and density functional theory (DFT) calculations reveal a substantial reduction in the energy barrier for the critical *COOH-to-*CO conversion on NUS-8-PhSO3H. Moreover, the versatility of this strategy is confirmed by enhanced photocatalytic...
Fourier transform infrared spectroscopy (FTIR) analyses show that the 1308 cm absorption peak attributes to the superposition of angular vibration frequency of -CH2 and alkylcarbonate. The 1.6M-TEPA-ethanol-14%-H2O system shows the best comprehensive performance, 96.23 vol% CO2 is enriched in the ...
[64] used ATR-FTIR spectroscopy to analyse the specific interactions of CO2and ILs [Bmim][BF4] and [Bmim][PF6]. They saw evidence of chemical interactions between the anion [PF6]−and CO2. They concluded that they observed weak Lewis acid-base interactions, where the anion acts as a ...
In situ FTIR measurements were further conducted to gain insights into the reaction intermediates involved in the COxRR. As shown in Fig.3and Supplementary Fig.15, a broad peak located at 1645 cm–1associated with the O–H bending mode of water molecules remained unchanged for both reactions...
(Fig.2j; Supplementary Fig.6and Table2). The distinct Au-O coordination was in stark contrast with the metallic Au-Au coordination observed in Au foil. A small peak at ~2.90 Å was observed for BTOPAu, corresponding to the second-shell Au-Au coordination. This was proven by the ...