The activation of CO2 by potassium-promoted Ru (001) I. FT-IRAS and TDMS study of oxalate and carbonate intermediates
Yazarlar (3)
| Makale Türü | Özgün Makale (Uluslararası alan indekslerindeki dergilerde yayınlanan tam makale) | ||
| Dergi Adı | Surface science | ||
| Makale Dili | – | Basım Tarihi | 09-1994 |
| Cilt / Sayı / Sayfa | 316 / 3 / 277–293 | DOI | – |
| Makale Linki | https://www.sciencedirect.com/science/article/pii/0039602894912203 | ||
| UAK Araştırma Alanları |
Dedektör Teknolojisi
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| Özet |
| The interaction of CO2 with the clean and alkali promoted Ru(001) surface has been studied with time-evolved Fourier transform-infrared reflection absorption spectroscopy (FT-IRAS) and thermal desorption mass spectrometry (TDMS). CO2 adsorbs on the clean Ru(001) surface at 85 K in a physisorbed CO2 monolayer, which desorbs undissociated at 100 K. The interaction of CO2 with a √3 × √3-R30° monolayer of potassium on Ru(001) results in the facile formation of oxalate at 85 K. Oxalate decomposes to carbonate after heating above 150 K, i.e. C2O4 → CO3 + CO. Vibrational spectra suggest, in agreement with theoretical calculations, an ionic carbonate species with D3h symmetry and the molecular plane oriented perpendicular to the surface, although alternate coordinations cannot be completely ruled out. Decomposition of the carbonate starts at 700 K and results in the simultaneous desorption of K and … |
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