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Lan, Z., Fu, H., Zhao, R., Liu, H., Zhou, W., Ning, H., et al. (2022) Roles of in Situ-Formed NbN and Nb₂O₅ from N-Doped Nb₂C Mxene in Regulating the Re/Hydrogenation and Cycling Performance of Magnesium Hydride. Chemical Engineering Journal, 431, Article ID: 133985.
https://doi.org/10.1016/j.cej.2021.133985

has been cited by the following article:

• 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.