Mechanical Engineering Faculty Publications and Presentations
Document Type
Article
Publication Date
2-2025
Abstract
Addition of Mg–Nb oxides (e.g. MgNb2O6, Mg4Nb2O9, and Mg3Nb6O11) ameliorates H2 absorption/desorption kinetics of MgH2 as demonstrated in the current article. H2 desorption and absorption rates of the ball-milled MgH2 are evidently temperature-dependent, which points out that the prior rate increases with increasing temperature (593–673 K) and vice versa. Among the tested samples, MgH2 with Mg3Nb6O11 nanoparticles showed superior performance. The Johnson–Mehl–Avrami equation was employed to construct H2 desorption curves as well as find out reaction rate constants at different temperatures. The Arrhenius equation was fitted in the context to estimate the activation energy of the ball-milled MgH2 and MgH2/Mg3Nb6O11 mixtures; for example, the values obtained were 127 and 88 kJ·mol−1, respectively. In addition, a novel experimental setup combining a hydrogen detector with a differential scanning calorimeter was used to confirm the H2 desorption properties of the ball-milled nanoparticles discussed based on the kinetic argument.
Recommended Citation
Rahman, Md Wasikur, Muhammad Nurunnabi Siddiquee, Mohammad M. Hossain, and M. Jasim Uddin. "Effect of Mg–Nb Oxides on Hydrogen Sorption Kinetics of Ball–milled MgH2." Clean Energy (2025): zkae108. https://doi.org/10.1093/ce/zkae108
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Publication Title
Clean Energy
DOI
10.1093/ce/zkae108
Comments
© The Author(s) 2025. Published by Oxford University Press on behalf of National Institute of Clean-and-Low-Carbon Energy. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.