Titanium‒Nickel Dual Active Sites Enabled Reversible Hydrogen Storage of Magnesium at 180 °C with Exceptional Cycle Stability
© 2025 Wiley‐VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 21. Apr., Seite e2500178 |
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| Weitere Verfasser: | , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article De/hydrogenation Mg Ti‐based catalyst cycling stability hydrogen storage |
| Zusammenfassung: | © 2025 Wiley‐VCH GmbH. Enhancing hydrogenation and dehydrogenation (de/hydrogenation) kinetics without compromising cycle stability is a major challenge for Mg-based hydrogen storage materials (Mg/MgH2). The de/hydrogenation reactions of Mg/MgH2 are one of the gas-solid reactions involving hydrogen adsorption, dissociation, diffusion, and nucleation, which often results in the catalysts being unable to simultaneously accelerate these distinct kinetic processes. Here, the Mg2NiTi─MgO catalyst with dual active sites is reported to be designed to address this issue. The stabilization of Ti2+ and Ti3+ valence states in the MgO lattice simultaneously accelerates hydrogen adsorption and dissociation. Additionally, Mg2Ni serves as a hydrogen diffusion and nucleation center, synergistically enhancing de/hydrogenation reactions. Consequently, it enables MgH2 to release 5.28 wt.% H2 in 2 min at 280 °C, and achieves 1.96 wt.% H2 of hydrogen release in 60 min at 180 °C. The Mg2Ni@Ti─MgO catalyst exhibits remarkable chemical stability at the interfacial structure, minimizing structural and chemical degradation impact, and realizing excellent de/hydrogenation performance over 1000 cycles. These results provide a new methodology for optimizing multiple kinetic steps, attaining highly efficient and stable de/hydrogenation reactions |
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| Beschreibung: | Date Revised 21.04.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202500178 |