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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
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Hydrogen Isotope Separation Using a Metal-Organic Cage Built from Macrocycles
Donglin He1, Linda Zhang2, Tao Liu1
1Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool, L7 3NY, UK.
Angewandte Chemie (International Ed. in English)
|June 10, 2022
Summary
This study introduces a novel metal-organic cage (MOC) for hydrogen isotope separation. The material demonstrates effective deuterium/hydrogen (D2/H2) selectivity via kinetic quantum sieving (KQS) at practical temperatures.
Area of Science:
- Materials Science
- Chemical Engineering
- Physical Chemistry
Background:
- Porous materials with ultrafine pores can separate hydrogen isotopes using kinetic quantum sieving (KQS).
- Designing materials for KQS with narrow pores, high adsorption capacity, and practical operating temperatures remains a challenge.
Purpose of the Study:
- To investigate a metal-organic cage (MOC) for hydrogen isotope separation.
- To evaluate the D2/H2 selectivity and adsorption capacity of the MOC at various temperatures.
Main Methods:
- Synthesis and characterization of a novel MOC assembled from organic macrocycles and Zn(II) ions.
- Gas sorption analysis and thermal desorption spectroscopy to study adsorption properties and pore aperture behavior.
- Evaluation of D2/H2 selectivity across a temperature range of 30-100 K.
Main Results:
- Two polymorphs (2α and 2β) of the MOC were identified, both showing D2/H2 selectivity between 30-100 K.
- The 2β polymorph exhibited a 2.7-fold increase in D2 adsorption capacity at 77 K compared to 2α, with maintained selectivity.
- A gate-opening effect in the MOC pore aperture was observed, facilitating KQS.
Conclusions:
- The developed MOC demonstrates promising performance for hydrogen isotope separation.
- The gate-opening effect enables KQS at temperatures above liquid nitrogen, suggesting industrial applicability.
- Metal-organic cages are viable candidates for hydrogen isotope separation in real-world industrial settings.
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