中南大学
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返回首页Synergistic Dual Heteroatom-Engineered Superactivated Carbon Unlocks Record-High Hydrogen Storage via Mg─F Orbital Hybridization
发布时间：2025-10-21
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- DOI码：
- 10.1002/adma.202509511
- 发表刊物：
- Advanced Materials
- 关键字：
- biochar, hydrogen storage, orbital-level modulation, surface modification, superactivated carbon
- 摘要：
- 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-F@C 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.
- 论文类型：
- 期刊论文
- 论文编号：
- e09511
- 是否译文：
- 否
- 发表时间：
- 2025-10-21
- 收录刊物：
- SCI
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