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Hydrogen Uptake on Coordinatively Unsaturated Metal Sites in VSB-5: Strong Binding Affinity Leading to High-Temperature D2/H2 Selectivity
- Source :
- Langmuir. 33:14586-14591
- Publication Year :
- 2017
- Publisher :
- American Chemical Society (ACS), 2017.
-
Abstract
- We examine the adsorption of hydrogen and deuterium into the nanoporous nickel phosphate, VSB-5. On the basis of gas sorption analysis, VSB-5 exhibits one of the highest measured H2 heats of adsorption (HOA) for hydrogen (16 kJ/mol) yet reported. This high HOA is consistent with an unusually large red shift in the Q(1) and Q(0) hydrogen vibrational modes as measured with in situ infrared spectroscopy. The HOA for D2 is measured to be 2 kJ/mol higher than that for H2. “Ideal adsorbed solution theory” analysis of H2 and D2 isotherms provides selectivities above 4 for deuterium at 140 K, suggesting that VSB-5 is a promising adsorbent for pressure-swing adsorption-type separations of hydrogen isotopes.
- Subjects :
- Hydrogen
Chemistry
Nanoporous
Inorganic chemistry
chemistry.chemical_element
Sorption
02 engineering and technology
Surfaces and Interfaces
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Metal
Adsorption
Deuterium
Molecular vibration
visual_art
Electrochemistry
visual_art.visual_art_medium
General Materials Science
0210 nano-technology
Selectivity
Spectroscopy
Subjects
Details
- ISSN :
- 15205827 and 07437463
- Volume :
- 33
- Database :
- OpenAIRE
- Journal :
- Langmuir
- Accession number :
- edsair.doi...........647d8cba7f1333016f87c12cd318a26a