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Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel

Magnesium hydride is regarded as one of the most ideal candidates for hydrogen storage, but its relatively high operating temperatures and slow kinetics always hinder its commercial applications. Herein, we first fabricated hard-carbon-sphere-wrapped Ni (Ni/HCS) via a mild chemical method; subsequen...

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Autores principales: Peng, Dandan, Ding, Zhenmin, Fu, Yaokun, Wang, Yu, Bi, Jia, Li, Yuan, Han, Shumin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9084346/
https://www.ncbi.nlm.nih.gov/pubmed/35542472
http://dx.doi.org/10.1039/c8ra05464a
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author Peng, Dandan
Ding, Zhenmin
Fu, Yaokun
Wang, Yu
Bi, Jia
Li, Yuan
Han, Shumin
author_facet Peng, Dandan
Ding, Zhenmin
Fu, Yaokun
Wang, Yu
Bi, Jia
Li, Yuan
Han, Shumin
author_sort Peng, Dandan
collection PubMed
description Magnesium hydride is regarded as one of the most ideal candidates for hydrogen storage, but its relatively high operating temperatures and slow kinetics always hinder its commercial applications. Herein, we first fabricated hard-carbon-sphere-wrapped Ni (Ni/HCS) via a mild chemical method; subsequently, the as-prepared additive was introduced to fabricate an Mg–Ni/HCS composite by using hydriding combustion synthesis. Hard carbon spheres (HCS) effectively inhibited the agglomeration of hydride particles during hydrogen storage cycling; they could also provide active sites to promote the nucleation of Mg-based hydrides. During the hydriding combustion synthesis procedure, in situ-formed Mg(2)NiH(4) could induce the absorption of MgH(2), thus triggering its hydrogen properties. Remarkable enhancement in hydrogen absorption properties of the composite was found. The composite absorbed 6.0 wt% H(2) within 5 min at 275 °C; moreover, even at 75 °C, it could still absorb 3.5 wt% H(2). Furthermore, it delivered a high reversible hydrogen absorption capacity of 6.2 wt% and excellent rate capability at 350 °C. It was also demonstrated that the composite could release 6.2 wt% H(2) at 350 °C within 5 min. A rather low activation energy value (65.9 kJ mol(−1)) for the dehydrogenation of MgH(2) was calculated as compared to that for commercial MgH(2) (133.5 kJ mol(−1)).
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spelling pubmed-90843462022-05-09 Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel Peng, Dandan Ding, Zhenmin Fu, Yaokun Wang, Yu Bi, Jia Li, Yuan Han, Shumin RSC Adv Chemistry Magnesium hydride is regarded as one of the most ideal candidates for hydrogen storage, but its relatively high operating temperatures and slow kinetics always hinder its commercial applications. Herein, we first fabricated hard-carbon-sphere-wrapped Ni (Ni/HCS) via a mild chemical method; subsequently, the as-prepared additive was introduced to fabricate an Mg–Ni/HCS composite by using hydriding combustion synthesis. Hard carbon spheres (HCS) effectively inhibited the agglomeration of hydride particles during hydrogen storage cycling; they could also provide active sites to promote the nucleation of Mg-based hydrides. During the hydriding combustion synthesis procedure, in situ-formed Mg(2)NiH(4) could induce the absorption of MgH(2), thus triggering its hydrogen properties. Remarkable enhancement in hydrogen absorption properties of the composite was found. The composite absorbed 6.0 wt% H(2) within 5 min at 275 °C; moreover, even at 75 °C, it could still absorb 3.5 wt% H(2). Furthermore, it delivered a high reversible hydrogen absorption capacity of 6.2 wt% and excellent rate capability at 350 °C. It was also demonstrated that the composite could release 6.2 wt% H(2) at 350 °C within 5 min. A rather low activation energy value (65.9 kJ mol(−1)) for the dehydrogenation of MgH(2) was calculated as compared to that for commercial MgH(2) (133.5 kJ mol(−1)). The Royal Society of Chemistry 2018-08-13 /pmc/articles/PMC9084346/ /pubmed/35542472 http://dx.doi.org/10.1039/c8ra05464a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Peng, Dandan
Ding, Zhenmin
Fu, Yaokun
Wang, Yu
Bi, Jia
Li, Yuan
Han, Shumin
Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel
title Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel
title_full Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel
title_fullStr Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel
title_full_unstemmed Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel
title_short Enhanced H(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel
title_sort enhanced h(2) sorption performance of magnesium hydride with hard-carbon-sphere-wrapped nickel
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9084346/
https://www.ncbi.nlm.nih.gov/pubmed/35542472
http://dx.doi.org/10.1039/c8ra05464a
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