Data · dataset · 2026
Catalytic and Nanoconfinement Synergistic Mechanism for Hydrogen Storage Performance of NiO@CNTs-Modified MgH2
Listed in ScienceDB
To address the core bottlenecks of magnesium-based hydrogen storage materials, namely slow kinetics, high operating temperatures, and poor cycling stability, this study designed and constructed a NiO@CNTs composite structure, developing a synergistic catalytic-confinement modification strategy.
Description
The Mg2Ni/Mg2NiH4 phase, generated in situ during the hydrogen storage/desorption reaction between NiO@CNTs and MgH2, acts as a hydrogen pump to significantly weaken Mg-H bonds.
Concurrently, it confines MgH2 particles within the CNTs network, thereby suppressing sintering and agglomeration. The composite material NiO@CNTs-MgH2 achieved a hydrogen storage capacity of 6.23wt%, an initial dehydrogenation temperature as low as 207.6°C, and reduced the dehydrogenation activation energy to 91.05 kJ/mol. It released 5.2 wt% hydrogen within 10 minutes at 300°C, maintaining 96% capacity retention after 20 cycles.
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The study reveals that the hydrogen pumping effect and nano-confinement do not simply add up but form a mutually reinforcing synergistic mechanism. Mg2Ni/Mg2NiH4 accelerates hydrogen interfacial reactions, while CNT confinement stabilizes the active phase and particle structure, jointly ensuring the material's long-term stability. This research provides new theoretical foundations and design insights for rationally developing high-performance, long-lifetime magnesium-based hydrogen storage materials, advancing the practical application of magnesium-based solid-state hydrogen storage.
Links
Where it is published
- DOI doi.org/10.57760/sciencedb.j00124.00522 ↗
DOI / persistent id · from scidb cn
Catalogue records · 1
- OAI-PMH record scidb.cn/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=10.57760%2… ↗
metadata API · from scidb cn
Topics
- From keywords
- Earth & Environmental Science · Engineering · Humanities · Life Sciences · Social Science
- Inferred from text
- Chemical engineering 73%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| ScienceDB | 10.57760/sciencedb.j00124.00522 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].anzsrc:group:4004 | enrichment · scidb cn | taxonomy-embedding@1.0.0 | title+keywords+description (73%) |
| concepts[field].local:field:earth-environmental | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:engineering | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:humanities | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:social-science | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| description | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/description |
| license | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/rights |
| publication_date | source · scidb cn | connector:scidb_cn@1.0.0 | |
| title | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/title |