Abstract

Madhu Yadav^1,2, Deepak Kumar Yadav^1,3, Satya Narayan Dolia^1,2 and Chhagan Lal^1,2*

DOI : http://dx.doi.org/10.13005/ojc/400530

MgH₂ is attracting significant attention in the field of materials for storing hydrogen due to its mass-related hydrogen retention capacity, excellent reversibility, and cost-effectiveness making it a feasible option for fulfilling energy-sustaining needs. Despite its slow desorption and absorption limitation, the kinetics of MgH₂ can be improved by the ball milling technique. In this work to synthesis nanocomposite, various wt% concentrations of Y₂O₃ (X = 5, 10) are introduced to MgH₂. Thermodynamics of all prepared samples were measured by DSC, TGA, and PCT/PCI setups. The PCT investigation reveals that the Mg/MgH₂-5 wt% Y₂O₃ nanocomposites store 4.7 wt% H₂, where 100 h milled Mg/MgH₂ store 5.2 wt% hydrogen. Adding Y₂O₃ with MgH₂ reduces the dehydriding activation energy and onset temperature of Mg/MgH₂.

Activation energy; DSC; Hydrogen storage; MgH; PCT; TGA; Y2O3

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