Cryogenic TDS Platform for Quantitative Hydrogen Isotope (H 2 /D 2 /HD) Separation via Quantum Sieving in Porous Materials
Source abstract
Abstract
ABSTRACT Accurate evaluation of hydrogen isotope separation performance is critical for the development of advanced porous materials for energy, semiconductor, and nuclear applications. Herein, we report the development of an advanced cryogenic thermal desorption spectroscopy (AC‐TDS) platform capable of quantitatively analyzing hydrogen isotopes (H 2 , D 2 , and even HD) over a wide temperature range (15 – 900 K). The system incorporates calibration standards such as TiH 2 and Pd 95 Ce 5 alloy, enabling reliable quantification of desorbed gases. By varying the gas exposure temperature, time, and pressure, we can elucidate the microscopic nature of adsorption processes associated with structural flexibility, pore accessibility, or strong adsorption sites. With binary (H 2 /D 2 ) and ternary (H 2 /HD/D 2 ) isotope gas mixtures, AC‐TDS directly determines isotope‐dependent uptakes and selectivities using small quantities of samples and extracts desorption energetics via multi‐rate analysis. Using specific gas exposure conditions, the TDS technique offers a powerful diagnostic tool for understanding adsorption energetics, framework dynamics, and isotope selectivity, and allows a rapid characterization of porous materials for hydrogen isotope separation applications based on selective adsorption.
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Research context
OpenAlex topics: Chemical Synthesis and Characterization · Covalent Organic Framework Applications · Metal-Organic Frameworks: Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) Ulsan Republic of Korea
Max Planck Institute for Solid State Research Stuttgart Germany
Advanced Institute for Materials Research (WPI‐AIMR) Tohoku University Sendai Japan
Graduate School of Carbon Neutrality Ulsan National Institute of Science and Technology (UNIST) Ulsan Republic of Korea
Funding
National Research Foundation of Korea
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