Efficient Selective CO<sub>2</sub> Composite Sorbent from Amino Acid Ionic Liquids and Silica Gel: <sup>2</sup>H NMR Spectroscopy Provides Insight on the CO<sub>2</sub>‐Binding Mechanism and in‐Pore Microscopic Viscosity
A promising CO<sub>2</sub> sorbent based on the [Emim][Gly] (1-ethyl-3-methylimidazolium glycinate)/silica gel composite has been studied. CO<sub>2</sub> sorption experiments have shown that the optimum loading of [Emim][Gly] ionic liquid in silica gel is 40 wt.%. The 2-step process CO<sub>2</sub> binding mechanism in [Emim][Gly] has been proposed based on the results of sorption experiments, <sup>2</sup>H NMR spectroscopy and ab-initio calculations. The impact of CO<sub>2</sub> on the microscopic viscosity and the dynamical melting of ionic liquid has been thoroughly investigated. <sup>2</sup>H NMR spectroscopy has revealed that CO<sub>2</sub> strongly binds cation and anion in [Emim][Gly], forcing them to move in a correlated fashion.
Authors
- Alexander E. Khudozhitkov (ORCID: https://orcid.org/0000-0002-9885-8608)
- Andrey Z. Sheshkovas (ORCID: https://orcid.org/0009-0005-9822-6749)
- Ralf Ludwig (ORCID: https://orcid.org/0000-0002-8549-071X)
- Alexander G. Stepanov (ORCID: https://orcid.org/0000-0003-2754-5273)
- Daniil I. Kolokolov (ORCID: https://orcid.org/0000-0002-1434-095X)
- Janna V. Veselovskaya (ORCID: https://orcid.org/0000-0003-1606-3746)
Institutions
- Boreskov Institute of Catalysis (RU)
- University of Rostock (DE)
Publication Details
- Journal
- ChemSusChem
- Published
- 2024-10-14
- DOI
- https://doi.org/10.1002/cssc.202401736
- Citations
- 1
- Primary Topic
- Carbon dioxide utilization in catalysis
- Type
- article
- Field-Weighted Citation Impact
- 0.18
Funders
- Deutsche Forschungsgemeinschaft
- Ministry of Science and Higher Education of the Russian Federation