Time-resolved EELS study of CO2 desorption from Ag (011)
โ Scribed by G.S. Elliott; K.J. Wu; S.D. Kevan
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 511 KB
- Volume
- 175
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
We present time-resolved electron-energy-loss-spectroscopy results for the isothermal desorption of CO? from Ag(Ol1). At all coverages below saturation of the first monolayer, the desorption is characterized by pseudo-zero-order kinetics resulting from the formatton of two-dimensional CO2 islands on the surface. Deviation from precisely zero-order behavior is attributed to a slightly larger sticking coefficient on the adsorbate-covered portions of the surface than on the clean surface. The energetics ofthe desorption process are analyzed in terms of the interaction of the molecules with the surface and with themselves.
๐ SIMILAR VOLUMES
The vibrational coherence relaxation of the S2, bound state of the Fermi dyad vI:2v2 in solid CO2 is studied with the timeresolved stimulated Raman technique as a function of temperature for pressures up to 4.4 GPa. The relaxation is determined by a competition between two contributions: a down-conv
The time resolution capabilities of a Fourier-transform infrared spectrometer are used in conjunction with a pulsed nozzle to study the effects of CO and 0 coverage on the product CO\* enegy distributions from the oxidation of CO on Pt and Pd surfaces. No coverage effect is found on Pd but on Pt a l