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Energy-based descriptors to rapidly predict hydrogen storage in metal–organic frameworks

Journal Article · · Molecular Systems Design & Engineering
DOI:https://doi.org/10.1039/C8ME00050F· OSTI ID:1508085
The low volumetric density of hydrogen is a critical limitation to its use as a transportation fuel. Filling a fuel tank with nanoporous materials, such as metal–organic frameworks (MOFs), could greatly improve the deliverable capacity of these tanks if appropriate materials could be found. Yet, since MOFs can be made from many combinations of metal nodes, organic linkers, and functional groups, the design space of possible MOFs is enormous. Experimental characterization of thousands of MOFs is infeasible, and even conventional molecular simulations can be prohibitively expensive for large databases. In this work, we have developed a data-driven approach to accelerate materials screening and learn structure–property relationships. We report new descriptors for gas adsorption in MOFs derived from the energetics of MOF–guest interactions. Using the bins of an energy histogram as features, we trained a sparse regression model to predict gas uptake in multiple MOF databases to an accuracy within 3 g L-1. The interpretable model parameters indicate that a somewhat weak attraction between hydrogen and the framework is ideal for cryogenic storage and release. Our machine learning method is more than three orders of magnitude faster than conventional molecular simulations, enabling rapid exploration of large numbers of MOFs. As a case study, we applied the method to screen a database of more than 50 000 experimental MOF structures. We experimentally validated one of the top candidates identified from the accelerated screening, MFU-4l. This material demonstrated a hydrogen deliverable capacity of 47 g L-1 (54 g L-1 simulated) when operating at storage conditions of 77 K, 100 bar and delivery at 160 K, 5 bar.
Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States). Nanoporous Materials Genome Center
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0008688
OSTI ID:
1508085
Alternate ID(s):
OSTI ID: 1481431
Journal Information:
Molecular Systems Design & Engineering, Journal Name: Molecular Systems Design & Engineering Journal Issue: 1 Vol. 4; ISSN 2058-9689; ISSN MSDEBG
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (6)

Clean hydrogen generation and storage strategies via CO 2 utilization into chemicals and fuels: A review
  • Bahari, Nurazni Amat; Wan Isahak, Wan Nor Roslam; Masdar, Mohd Shahbudin
  • International Journal of Energy Research, Vol. 43, Issue 10 https://doi.org/10.1002/er.4498
journal March 2019
Exceptional hydrogen storage achieved by screening nearly half a million metal-organic frameworks journal April 2019
Role of partial charge assignment methods in high-throughput screening of MOF adsorbents and membranes for CO 2 /CH 4 separation journal January 2020
An extensive comparative analysis of two MOF databases: high-throughput screening of computation-ready MOFs for CH 4 and H 2 adsorption journal January 2019
Prediction of hydrogen adsorption in nanoporous materials from the energy distribution of adsorption sites journal August 2019
Molecular modelling and machine learning for high-throughput screening of metal-organic frameworks for hydrogen storage journal April 2019

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Journal Article · Tue Jul 15 00:00:00 UTC 2025 · Molecular Systems Design & Engineering · OSTI ID:3010679