Carbon dioxide activation and alkali compound formation. I. Vibrational characterization of oxalate intermediates
Yazarlar (3)
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Surface science (Q2) | ||
| Makale Dili | – | Basım Tarihi | 06-2003 |
| Cilt / Sayı / Sayfa | 531 / 3 / 244–264 | DOI | – |
| Makale Linki | https://www.sciencedirect.com/science/article/pii/S0039602803005119 | ||
| UAK Araştırma Alanları |
Dedektör Teknolojisi
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| Özet |
| The activation of CO2 in thin potassium layers adsorbed on Cu(111) has been studied with time-evolved Fourier transform-infrared reflection absorption spectroscopy. The growth of thin layers by reactive evaporation of potassium in a CO2 atmosphere permits control of the K:CO2 stoichiometry, which strongly affects the selectivity in the formation of intermediates and the decomposition pathways of the layer. Layers grown in a CO2 rich atmosphere exhibit the preferential growth of stoichiometric potassium oxalate K2C2O4 (D2h). The molecular identity of oxalate with D2h symmetry is confirmed by vibrational spectra utilizing isotopic substitution methods (13CO2 and C18O2) and by the use of isotopic mixtures of CO2/C18O2 and CO2/13CO2. A comparison of the isotope data with theoretical calculations gives an estimated OCO bond angle in oxalate of 132°. Far-IR spectra obtained with synchrotron radiation … |
| Anahtar Kelimeler |
