Synergistic Dual Heteroatom-Engineered Superactivated Carbon Unlocks Record-High Hydrogen Storage via Mg─F Orbital Hybridization
© 2025 Wiley‐VCH GmbH.
| Publié dans: | Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 21. Okt., Seite e09511 |
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| Auteur principal: | |
| Autres auteurs: | , , , , , , , , , , , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Advanced materials (Deerfield Beach, Fla.) |
| Sujets: | Journal Article biochar hydrogen storage orbital‐level modulation superactivated carbon surface modification |
| Résumé: | © 2025 Wiley‐VCH GmbH. Hydrogen storage remains a critical challenge for sustainable energy systems. Here, a surface functionalization strategy is reported through C-Mg─F ternary coordination to engineer biomass-derived porous carbons with exceptional hydrogen storage performance. Using tobacco stems as precursors, the synthesized Mg-FC material achieves record hydrogen uptake capacities under 77 K of 4.2 wt% at 1 bar and 9.7 wt% at 50 bar, doubling pristine carbon performance. Multiscale analyses reveal adsorption mechanisms dominated by orbital interactions at Mg-active sites, where H2 electron transfer arises from hybridization of Mg 2p and unsaturated 3s orbitals, inducing directional polarization of H2 electron clouds which synergizes with hierarchical porosity (3500 m2 g-1 surface area) to enhance adsorption. Combined photophysical analysis establishes a mechanistic framework linking static electronic configurations to dynamic adsorption processes. The material retains structural integrity under pressure cycling and demonstrates universal applicability across diverse biomass. This work provides a generalizable paradigm for designing high-capacity hydrogen storage materials via orbital-level modulation of porous carbons |
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| Description: | Date Revised 21.10.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202509511 |