CO2 Adsorption Sites in UTSA-16: Multitechnique Approach

Alessio Masala, Francesca Grifasi, Cesare Atzori, Jenny G. Vitillo, Lorenzo Mino, Francesca Bonino, Michele R. Chierotti, Silvia Bordiga

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)12068-12074
Number of pages7
JournalJournal of Physical Chemistry C
Volume120
Issue number22
DOIs
StatePublished - Jun 9 2016

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