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V-, Nb- and Ta-Based Additives for Enhancing the Hydrogen Storage Performance of MgH2: A Review
Baochao Li1, Shuyan Guan2,3, Muhammad Moeen4
1School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, China.
Chempluschem
|May 8, 2026
Summary
Fifth-group-element additives like vanadium, niobium, and tantalum significantly improve magnesium hydride (MgH2) for hydrogen storage. These additives enhance performance by lowering temperatures, increasing rates, and boosting stability for practical applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Hydrogen Energy
Background:
- Magnesium hydride (MgH2) is a promising hydrogen storage material due to its high capacity and abundant resources.
- Practical applications are limited by high dehydrogenation temperatures, slow kinetics, and poor cycle stability.
Purpose of the Study:
- To review the effects and mechanisms of fifth-group-element additives on MgH2 hydrogen storage.
- To summarize current research and suggest future directions for improving MgH2 performance.
Main Methods:
- Systematic review of scientific literature on transition-metal-based additives for MgH2.
- Analysis of the impact of vanadium, niobium, and tantalum on hydrogen storage properties.
Main Results:
- Transition-metal additives effectively enhance MgH2 hydrogen storage.
- Fifth-group-element additives optimize kinetics, reduce reaction temperature, and improve cycle stability.
- Unique electronic structures and catalytic activity of V, Nb, Ta are key to performance enhancement.
Conclusions:
- Fifth-group-element additives are a viable strategy to overcome MgH2 limitations.
- Further research into V, Nb, Ta-based additives can advance MgH2 for practical hydrogen storage.
- Optimizing additive integration is crucial for large-scale MgH2 applications.
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