Variable-temperature infrared spectroscopy: An access to adsorption thermodynamics of weakly interacting systems
- 23 October 2002
- journal article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 4 (23) , 5713-5715
- https://doi.org/10.1039/b209299a
Abstract
Variable-temperature FTIR spectroscopy, with the simultaneous measurement of temperature and equilibrium pressure, is shown to be a convenient method for the thermodynamic study of adsorbent–adsorbate systems. When weak interactions are concerned, the technique presents favourable features, as compared to classical microcalorimetric measurements. This recently developed spectroscopic method is demonstrated by studying the adsorption of dinitrogen on the protonic zeolite H-ZSM-5, a system for which the availability of microcalorimetric measurements affords a direct check of the new method. The relevant thermodynamic quantities determined for this system are ΔH° = −19.7(±0.5) kJ mol−1 and ΔS° = −125(±5) J mol−1 K−1; the standard adsorption enthalpy compares favourably with the microcalorimetrically determined value of about 19 kJ mol−1.Keywords
This publication has 10 references indexed in Scilit:
- Thermodynamics of Hydrogen Bonding between CO and the Supercage Brønsted Acid Sites of the H-Y Zeolite − Studies from Variable Temperature IR SpectrometryEuropean Journal of Inorganic Chemistry, 2001
- Calorimetric Investigation of CO and N2 for Characterization of Acidity in Zeolite H−MFIThe Journal of Physical Chemistry B, 1999
- An ab initio study of terminal SiOH and bridging Si(OH)Al groups in zeolites and their interaction with carbon monoxideJournal of Molecular Structure: THEOCHEM, 1996
- Characterization of Gallosilicate MFI-Type Zeolites by IR Spectroscopy of Adsorbed Probe MoleculesThe Journal of Physical Chemistry, 1996
- Infrared spectrometric studies of the surface basicity of metal oxides and zeolites using adsorbed probe moleculesCatalysis Today, 1996
- Diatomic molecular probes for mid-IR studies of zeolitesChemical Society Reviews, 1996
- N2 and CO molecules as probes of zeolite acidity: an infrared spectroscopy and density functional investigationCatalysis Letters, 1995
- Vibrational frequency shifts of diatomic molecules in interaction with a Na+ cation by ab initio calculations. Comparison with experiment on H2 and N2 adsorbed in NaA zeoliteChemical Physics Letters, 1994
- Low-temperature Fourier-transform infrared investigation of the interaction of CO with nanosized ZSM5 and silicaliteJournal of the Chemical Society, Faraday Transactions, 1992
- Ab initio calculation of the potential energy surface of the system N2Li+Chemical Physics, 1975