Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 122, Issue 45, Pages 26088-26095Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.8b08935
Keywords
-
Funding
- Czech Science Foundation [17-07642S]
- CERIT Scientific Cloud [LM2015070, LM2015042, LM2015085]
- Primus program of Charles University
Ask authors/readers for more resources
The temperature dependence of the isosteric heat of the CO adsorption on a high-silica protonic ferrierite (H-FER) zeolite was investigated using microcalorimetry and density functional theory/coupled-cluster (DFT/CC) atomistic simulations. A large change in the experimental heat of adsorption was observed at the zero-coverage limit for the CO/H-FER system (from 32.2 kJ/mol at 200 K to 25.4 kJ/mol at 300 K). This can be explained by a dramatic change in the CO dynamics in the 200-300 K temperature range. During our ab initio molecular dynamics simulation at 200 K, the CO molecule is localized; at 300 K, the molecule jumps between adjacent Bronsted sites. The only exception has been found for the T-4 '' site, where the fast desorption of the CO molecule is prevented by a curved ferrierite wall enclosing this site. The previously reported variable temperature adsorption of the CO/H-FER with Si/A1 27.5 (28.4(+/- 2) kJ/mol) is consistent with the Perdew-Burke-Ernzerhof/CC predictions for individual sites when the statistical distribution of adsorption sites and temperature effects are taken into account.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available