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Updated: May 23, 2025

Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
Published on: May 15, 2015
Facile fabrication of an Mxene-supported nano high-entropy hydride unlocking reversible hydrogen storage in Mg(BH4)2
Ao Xia1, Jiaguang Zheng1,2, Zhenxuan Ma1
1School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, China. jgzheng@just.edu.cn.
Abstract:
Nano-sized high-entropy hydrides (HEH) were synthesized and uniformly loaded onto Ti3C2via a modified mechanochemical method and were further demonstrated as an efficient catalyst for enhancing the hydrogen desorption kinetics and reversibility of Mg(BH4)2. The hydrogen was desorbed from Mg(BH4)2 + 30HEH@Ti3C2 at 83.5 °C, with a complete hydrogen release of 9.84 wt% achieved at 330 °C. The dehydrogenation activation energies were notably reduced to 131 kJ mol-1 and 163 kJ mol-1, which were identified as the primary factors responsible for the enhanced dehydrogenation kinetics. Cyclic tests revealed that HEH@Ti3C2 significantly enhanced the reversible ability of Mg(BH4)2, maintaining a reversibility of 4.6 wt% after the 10th test. This study introduced a new approach to developing high-performance catalysts through the design and fabrication of multi-component catalysts.
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