Improvement of hydrogen-storage properties of MgH2 by Ni, LiBH4, and Ti addition

Song, Myoung Youp; Kwak, Young Jun; Shin, Hyung‐Shik; Lee, Seong Ho; Kim, Byoung-Goan

doi:10.1016/j.ijhydene.2012.11.074

Cited by 43 publications

(9 citation statements)

References 42 publications

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“…In recent years, two major approaches have been implemented to enhance the performances of Mg-based alloys: (1) adding catalytic elements, such as RE (rare-earth) elements 12 and TMs (transition metals); 13 and (2) creating amorphous and nanocrystalline microstructures, 14,15 including via hydriding combustion synthesis (HCS), 16 rapid solidification (RS), 17 and ball-milling (BM) methods. 18 Generally, Ni is the most effective of the transition-metal group of catalytic elements on hydrogen storage performance, especially electrochemical performance. The excellent results are based on the fact that TM elements act as unique catalysts that are helpful at reducing the energy barriers of hydrogen atom recombination and hydrogen molecule decomposition.…”

Section: Introductionmentioning

confidence: 99%

Improving the dynamics of a Nd–Mg–Ni-based alloy by combining Ni element and mechanical milling

Zhang

Hui

et al. 2021

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Improving the dynamics of a Nd–Mg–Ni-based alloy by combining Ni element and mechanical milling

Zhang

Hui

et al. 2021

RSC Adv.

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“…Therefore, more attention has been paid to enhance the kinetics of MgH 2 by mixing MgH 2 with different catalysts or additives by means of ball-milling. 14,[18][19][20] Among these, transition metal complexes, especially Ti-based compounds, have been widely used as effective catalysts to facilitate the dehydrogenation performance of MgH 2 . For example, Ma et al 21,22 found that adding 4 mol% TiF 3 could remarkably improve the sorption kinetics of MgH 2 .…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of TiN decorated graphene and its enhanced catalytic effects on dehydrogenation performance of magnesium hydride

Wang

et al. 2014

Nanoscale

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TiN@rGO nanohybrids were successfully synthesized by a simple "urea glass" technique. Experimental results demonstrated that TiN nanocrystals, with an average particle size of 20 nm, were uniformly anchored onto highly reduced graphene nanosheets. The as-synthesized TiN@rGO nanohybrids showed a porous planar-like structure, which had a large surface area of 177 m(2) g(-1). More importantly, the as-prepared TiN@rGO hybrids showed enhanced catalytic effects on the dehydrogenation of MgH2. The dehydrogenation thermodynamics and kinetics of the MgH2-TiN@rGO composites were systematically investigated and some significant improvements were confirmed. It was found that the 10 wt% TiN@rGO doped MgH2 sample started to release hydrogen at about 167 °C, and roughly 6.0 wt% hydrogen was released within 18 min when isothermally heated to 300 °C. In contrast, the onset dehydrogenation temperature of the pure MgH2 sample was about 307 °C, and only 3.5 wt% hydrogen was released even after 120 min of heating under identical conditions. In addition, the catalytic mechanism of TiN@rGO on the dehydrogenation of MgH2 was discussed using the Johnson-Mehl-Avrami (JMA) model and X-ray diffraction equipment.

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“…Wu et al 20 reported that amorphous and/or nanocrystalline structures can help increase the electrochemical absorption and desorption performances of Mg-Ni-based alloys. Few techniques are used to synthesize Mg-based alloys with different compositions such as (a) mechanical milling, 21 (b) rapid solidication (RS), 22 (c) hydriding combustion synthesis and (d) equal channel angular pressing (ECAP). 23,24 The universally accepted methods of obtaining amorphous and/or nanocrystalline alloys are mechanical milling and melt spinning.…”

Section: Introductionmentioning

confidence: 99%

Improved hydrogen storage kinetics of nanocrystalline and amorphous Ce–Mg–Ni-based CeMg₁₂-type alloys synthesized by mechanical milling

Zhang

Wang

et al. 2018

RSC Adv.

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In this paper, ball milling was used to prepare CeMg 11 Ni + x wt% Ni (x ¼ 100, 200) alloys having nanocrystalline and amorphous structures. The structures of the alloys and their electrochemical and gaseous kinetic performances were systematically investigated. It was shown that the increase in Ni content was beneficial to the formation of nanocrystalline and amorphous structures, and it significantly enhanced the electrochemical and gaseous hydrogen storage performances of as-milled alloys. In addition, the hydrogen storage capacities of the alloys fluctuated greatly with variation in milling duration. The maximum values of hydrogen capacity detected by varying the milling durations were 5.949 wt% and 6.157 wt% for x ¼ 100 and 200 alloys, respectively. Similar results were observed for the hydriding rates and high-rate discharge abilities (HRD) of the as-milled alloys. The dehydriding rate increased with the increase in milling duration. The reduction in hydrogen desorption activation was the reason for enhanced gaseous hydrogen storage kinetics.

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Improvement of hydrogen-storage properties of MgH2 by Ni, LiBH4, and Ti addition

Cited by 43 publications

References 42 publications

Improving the dynamics of a Nd–Mg–Ni-based alloy by combining Ni element and mechanical milling

Improving the dynamics of a Nd–Mg–Ni-based alloy by combining Ni element and mechanical milling

Facile synthesis of TiN decorated graphene and its enhanced catalytic effects on dehydrogenation performance of magnesium hydride

Improved hydrogen storage kinetics of nanocrystalline and amorphous Ce–Mg–Ni-based CeMg₁₂-type alloys synthesized by mechanical milling

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Improvement of hydrogen-storage properties of MgH2 by Ni, LiBH4, and Ti addition

Cited by 43 publications

References 42 publications

Improving the dynamics of a Nd–Mg–Ni-based alloy by combining Ni element and mechanical milling

Improving the dynamics of a Nd–Mg–Ni-based alloy by combining Ni element and mechanical milling

Facile synthesis of TiN decorated graphene and its enhanced catalytic effects on dehydrogenation performance of magnesium hydride

Improved hydrogen storage kinetics of nanocrystalline and amorphous Ce–Mg–Ni-based CeMg12-type alloys synthesized by mechanical milling

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Improved hydrogen storage kinetics of nanocrystalline and amorphous Ce–Mg–Ni-based CeMg₁₂-type alloys synthesized by mechanical milling