The key role of K+ counterions in determining the high CO2 capacity of UTSA-16 has been highlighted thanks to a combined use of in situ infrared and 13C solid-state NMR spectroscopies performed in a controlled atmosphere at variable temperature and pressure. A second family of sites, engaged at higher temperature or at higher coverage, was identified in the organic linker. Variable temperature IR measurements of molecular hydrogen at 15 K allowed to further distinguish the K+ sites in two families, slightly different in their polarizing ability and indistinguishable on the basis of CO2 isosteric heat and by using a less sensitive probe than H2, as CO and N2.

CO2 Adsorption Sites in UTSA-16: Multitechnique Approach

Vitillo Jenny G.;Bordiga Silvia
2016-01-01

Abstract

The key role of K+ counterions in determining the high CO2 capacity of UTSA-16 has been highlighted thanks to a combined use of in situ infrared and 13C solid-state NMR spectroscopies performed in a controlled atmosphere at variable temperature and pressure. A second family of sites, engaged at higher temperature or at higher coverage, was identified in the organic linker. Variable temperature IR measurements of molecular hydrogen at 15 K allowed to further distinguish the K+ sites in two families, slightly different in their polarizing ability and indistinguishable on the basis of CO2 isosteric heat and by using a less sensitive probe than H2, as CO and N2.
2016
http://pubs.acs.org/journal/jpccck
Physical and Theoretical Chemistry; Electronic; Optical and Magnetic Materials; Surfaces; Coatings and Films; Energy (all)
Masala, Alessio; Grifasi, Francesca; Atzori, Cesare; Vitillo Jenny, G.; Mino, Lorenzo; Bonino, Francesca; Chierotti Michele, R.; Bordiga, Silvia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2076410
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