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Cao, Z., Guo, J., Chen, S., Zhang, Z., Shi, Z., Yin, Y., et al. (2021) In Situ Synthesis of an Ultrafine Heterostructural Nb2O5-NbC Polysulfide Promotor for High-Performance Li-S Batteries. Journal of Materials Chemistry A, 9, 21867-21876.
https://doi.org/10.1039/d1ta05657c
has been cited by the following article:
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TITLE:
In-Situ Synthesis of Nb2O5-NbC Heterojunctionsregulates the Hydrogen Storage Performance of MgH2
AUTHORS:
Hui Zhang
KEYWORDS:
Nb2O5-NbC, MgH2, Heterojunctions, Hydrogen Storage
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.14 No.4,
April
23,
2026
ABSTRACT: Among diverse hydrogen storage materials, magnesium hydride (MgH2) is a promising solid-state candidate featuring high hydrogen capacity and low cost. However, its sluggish dehydrogenation kinetics and high initial dehydrogenation temperature drastically limit the large-scale commercialization and practical application of MgH2. This work focuses on breaking the dehydrogenation kinetic barrier via designing a unique heterostructure catalyst to reduce desorption temperature and improve hydrogen storage performance. Ultrafine Nb2O5-NbC heterojunctions evenly dispersed in carbon nanofiber (CNF) matrix were synthesized through a simple electrospinning method, where polystyrene (PS) acted as a growth regulator to prevent nanoparticle agglomeration. Experimental and theoretical results demonstrate that higher electrospinning speed enlarges CNF diameter, lowering Nb2O5-NbC heterojunction density per unit matrix and increasing the initial desorption temperature of MgH2 composite. Relative to neat ball-milled MgH2, the MgH2 composite modified by Nb2O5-NbC/CNF-PS catalyst shows 52.6˚C decline in initial dehydrogenation temperature and 29.1˚C drop in peak desorption temperature. The enhanced dehydrogenation performance is mainly attributed to the synergistic catalysis of Nb2O5-NbC heterojunctions. Moreover, the CNF matrix serves as a confinement scaffold to stabilize heterojunction nanoparticles and provides auxiliary catalytic activity, further elevating the overall hydrogen storage properties of MgH2.