Journal of Magnesium and Alloys
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2021
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IF 10.088
Shun Wang,Mingxia Gao,Zhihao Yao,Kaicheng Xian,Meihong Wu,Yongfeng Liu,Wenping Sun,Hongge Pan
Magnesium hydride (MgH 2 ) is one of the most promising hydrogen storage materials for practical application due to its favorable reversibility, low cost and environmental benign; however, it suffers from high dehydrogenation temperature and slow sorption kinetics. Exploring proper catalysts with high and sustainable activity is extremely desired for substantially improving the hydrogen storage properties of MgH 2 . In this work, a composite catalyst with high-loading of ultrafine Ni nanoparticles (NPs) uniformly dispersed on porous hollow carbon nanospheres is developed, which shows superior catalytic activity towards the de-/hydrogenation of MgH 2 . With an addition of 5 wt% of the composite, which contains 90 wt% Ni NPs, the onset and peak dehydrogenation temperatures of MgH 2 are lowered to 190 and 242 °C, respectively. 6.2 wt% H 2 is rapidly released within 30 min at 250 °C. The amount of H 2 that the dehydrogenation product can absorb at a low temperature of 150 °C in only 250 s is very close to the initial dehydrogenation value. A dehydrogenation capacity of 6.4 wt% remains after 50 cycles at a moderate cyclic regime, corresponding to a capacity retention of 94.1%. The Ni NPs are highly active, reacting with MgH 2 and forming nanosized Mg 2 Ni/Mg 2 NiH 4 . They act as catalysts during hydrogen sorption cycling, and maintain a high dispersibility with the help of the dispersive role of the carbon substrate, leading to sustainably catalytic activity. The present work provides new insight into designing stable and highly active catalysts for promoting the (de)hydrogenation kinetics of MgH 2 .
研究领域:
材料科学
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催化
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储氢
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纳米技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Yaokun Fu,Lu Zhang,Yuan Li,Sanyang Guo,Zhichao Yu,Wenfeng Wang,Kailiang Ren,Qiuming Peng,Shumin Han
The introduction of the heterogeneous catalysts with high activity can significantly improve hydrogen storage performance of MgH 2 , therefore, in this paper, we synthesize a carbon-supported transition metal compound, FeCoS@C derivative from ZIF-67, by utilizing the in situ formed C dispersive multiphase Mg 2 Co, α-Fe, Co 3 Fe 7 , and MgS to implement catalysis to MgH 2 . Noteworthily, MgH 2 -FeCoS@C rapidly absorbs 6.78 wt% H 2 within 60 s at 573 K and can also absorb 4.56 wt% H 2 in 900 s at 473 K. Besides, the addition of FeCoS@C results in decreasing of the initial dehydrogenation temperatures of MgH 2 from 620 to 550 K. The dehydrogenation activation energy of MgH 2 decreases from 160.7 to 91.9 kJ mol –1 . Studies show that the Mg 2 Co, α-Fe, and Co 3 Fe 7 act as “hydrogen channels” to accelerate hydrogen transfer due to the presence of transition metals, and MgS with excellent catalytic effect formed from MgH 2 -FeCoS@C provides a strong and stable catalytic effect. Besides, the carbon skeleton obtained by the carbonization of ZIF-67 not only serves as a dispersion for the multiphase catalytic system, but also provides more active sites for the catalysts. Our study shows that the multiphase and multiscale catalytic system provides an effective strategy for improving the hydrogen storage performance of MgH 2 .
研究领域:
材料科学
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催化
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Jinlong Yang,Xinglin Yang,Feitao Fan,Qianqian Han,Quanhui Hou
MgH 2 is a promising energy storage material due to its high hydrogen capacity and cost-effectiveness. However, its practical application is limited by a high dehydrogenation temperature and sluggish kinetics. While doping with Fe 2 NiO 4 alone has been shown to lower the initial dehydrogenation temperature, its kinetic performance remains insufficient. To address this, this study synthesizes a novel Co 0.2 Ni 0.8 /Fe 2 NiO 4 (CNFO) bimetallic catalyst via hydrothermal treatment, calcination, and ultrasonic methods. The results demonstrate that 15 wt% CNFO is the optimal doping concentration, under which MgH 2 exhibits outstanding hydrogen desorption performance, delivering 5.82 wt% H 2 in just 10 min under 260 °C. In comparison, although 40 wt% is the optimal loading for Fe 2 NiO 4 alone, it releases merely 3.79 wt% H 2 in 60 min under 300 °C. Regarding absorption, MgH 2 + 15 wt% CNFO absorbs 4.94 wt% H 2 in 9 min under 120 °C and 3 MPa, whereas MgH 2 + 40 wt% Fe 2 NiO 4 absorbs only 4.50 wt% H 2 in 9 min under 300 °C and 4 MPa. Therefore, the incorporation of Co0.2Ni0.8 is thus shown to be highly effective. Comprehensive characterization suggests that this improvement arises from the synergistic interaction between Co and Ni dispersed on the matrix surface, which effectively facilitates the reversible transformation between Mg 2 Ni and Mg 2 NiH 4 , thereby intensifying the so-called “hydrogen pump” effect. Altogether, this finding opens up a new avenue for the fabrication of MgH 2 catalysts with enhanced efficiency.
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高影响因子
Journal of Physical Chemistry C
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2021
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IF 4.126
Joshua Adedeji Bolarin,Zhao Zhang,Hujun Cao,Zhi Li,Teng He,Ping Chen
This paper seeks to present notable insights into the catalytic behavior of a ferroelectric BaTiO3 nanomaterial at the boundary plane in the separation of MgH2 starting from 185 °C. The synergy between mechanical milling and enhanced electronic distribution at the surface of BaTiO3 aided magnesium to a remarkable absorption of 4.5 wt % H2 at room temperature under 30 bar within 20 h. The composite released H2 ∼ 5.7 wt % in 15 min at 310 °C and ∼5.1 wt % in 90 min at 250 °C. The lowered activation energy of decomposition was calculated to be ∼60 kJ/mol with a decomposition enthalpy of 72.3 kJ/mol-H2. The composite reversibly produced ∼5.7 wt % H2 across 20 cycles in less than 120 h at 300 °C. As revealed by detailed experimental results, the interplay between +4 and +3 states of titanium at “111” twin boundaries of BaTiO3, and the formation of oxygen vacancies, play an important role in improving the sorption kinetics and the reversibility of Mg/MgH2. Meanwhile, the anomalous ferroelectric character of the +2 state of barium around Ti–O and Mg after milling of BaTiO3 is also believed to slightly enhance MgH2 desorption enthalpy via a chemisorption process. Our findings have brought MgH2 a few steps closer to practical applications.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 8.3
Xizhe Lu,Fang Cheng,Gangqiang Wu,Zhendong Yao,Yongfu Cui,Chao Li
MgH 2 is a hydrogen storage material with high hydrogen absorption/release temperatures and poor kinetics. Although a large number of catalysts capable of optimizing the performance of MgH 2 have been developed in recent years, there are relatively few studies focus on its size effect. In this work, TiO 2 particles with the similar morphology but different sizes were synthesized. It shows that reducing particle size within a certain range (from 1.3 μm to 60 nm) can dramatically enhance the catalytic effect of TiO 2 on MgH 2 . However, when the catalyst size reduces from 60 to 25 nm, due to the severe agglomeration of nanoparticles, there is a little improvement in the dehydrogenation temperature, but an obvious improvement in dynamics. It can be seen in solid-state catalytic systems, merely considering particle size while ignoring the problem of agglomeration and dispersion form of the catalyst in the matrix cannot achieve the best catalytic effect.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·Vol. 47
·期 83
·35352-35364
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IF 7.139
Zhichao Yu,Wei Zhang,Yongxi Zhang,Yaokun Fu,Ying Cheng,Sanyang Guo,Yuan Li,Shumin Han
Magnesium hydroxide (MgH 2 ) has excellent reversibility and high capacity, and is one of the most promising materials for hydrogen storage in practical applications. However, it suffers from high dehydrogenation temperature and slow sorption kinetics. Rare earth hydrides and transition metals can both significantly improve the de/hydrogenation kinetics of MgH 2 . In this work, MgH 2 –Mg 2 NiH 4 –CeH 2.73 is in-situ synthesized by introducing Ni@CeO 2 into MgH 2 . The unique coating structure of Ni@CeO 2 facilitates homogeneous distribution of synergetic CeH 2.73 and Mg 2 NiH 4 catalytic sites in subsequent ball milling process. The as-fabricated composite MgH 2 -10 wt% Ni@CeO 2 powders possess superior hydrogenation/dehydrogenation characteristics, absorbing 4.1 wt% hydrogen within 60 min at 100 °C and releasing 5.44 wt% H 2 within 10 min at 350 °C. The apparent activation energy of MgH 2 -10 wt% Ni@CeO 2 is determined to be 84.8 kJ/mol and it has favorable hydrogen cycling stability with almost no decay in capacity after 10 cycles.
研究领域:
材料科学
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无机化学
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能源化学
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纳米催化
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氢能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yaru Jiang,Yu Sun,Yafei Liu,Mengyuan Yue,Youhai Cao,Qihui Yuan,Yijing Wang
Solid-state hydrogen storage technologies exhibit significant potential for practical applications. A major challenge impeding the deployment of hydrogen storage materials is their reliance on elevated temperatures. Achieving reversible hydrogen absorption and desorption under mild conditions is crucial for advancing this technology. To address the limitations associated with conventional electrical heating, a photoelectric driving strategy is proposed by introducing TiO 2 /Fe 2 O 3 heterojunction photocatalyst and utilizing light as the sole energy source. Under the light intensity of 1.78 W cm −2 , MgH 2 +7TiO 2 /3Fe 2 O 3 composite is able to release 3.11 wt% H 2 within 45 min, with a remarkably low dehydrogenation activation energy of 77.32 kJ mol −1 . The composite also exhibits desirable reversibility in hydrogen storage and performs well under natural light conditions. Solar-driven reversible hydrogen storage of MgH 2 proposes an alternative to electrical heating and realizes the operation under milder conditions, offering a promising approach to address energy and environmental challenges.
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DOI
高影响因子
RARE METALS
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2025
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IF 11
Liu Yu-Kun,Pang Yu-Chen,Li Chao-Qun,Zhang Xiao-Yue,Hu Xue-Chun,Chen Wei,Yu Xue-Bin,Xia Guang-Lin
As a typical reactive composite hydrogen storage system, 2LiBH 4 –MgH 2 holds an ultrahigh hydrogen storage capacity of 11.5 wt%. However, it suffers from sluggish hydrogen storage kinetics due to the difficult nucleation of MgB 2 . Herein, amorphous VB 2 nanoparticles with an average size of approximately 32 nm are synthesized to enhance the hydrogen storage performance of 2LiBH 4 –MgH 2 composite. VB 2 , sharing the same hexagonal structure with MgB 2 with a d -value mismatch ratio of only 2.28%, could serve as effective nucleation sites for promoting the formation of MgB 2 . Theoretical calculations reveal that the introduction of VB 2 significantly reduces the binding energies of B and Mg, facilitating in situ nucleation of MgB 2 . As a result, after the introduction of VB 2 nanoparticles, complete hydrogen desorption of 9.23 wt% is achieved for 2LiBH 4 -MgH 2 within 2 h at 400 °C, which is 4 times shorter than the time required for pure 2LiBH 4 -MgH 2 , and no nucleation incubation period for hydrogen desorption is observed even at a low temperature of 380 °C. More importantly, a reversible capacity of 9.3 wt%, corresponding to a capacity retention of 100%, could be preserved after 10 cycles of hydrogen storage, demonstrating stable reversible hydrogen storage performance. This study provides a novel technological pathway for improving the reversible hydrogen storage performance of composite metal hydrides and offers significant insights into the development of high-performance hydrogen storage materials. Graphical
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
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IF 6.959
Yongyang Zhu,Yin Wang,Liming Zeng,Daifeng Wu,Cifu Lu,Xu-Sheng Yang,Qing Zhou,Renheng Tang,Fangming Xiao
Magnesium hydride (MgH2) is one of the most promising candidates for hydrogen generation materials due to the benign byproduct Mg(OH)2. However, the low solubility of Mg(OH)2 inevitably causes sluggish hydrolysis kinetics and low hydrogen yield. Herein, a facile strategy is reported to promote the hydrolysis performance of MgH2viain situ formation of metal borohydrides (M(BH4)x). MgH2@M(BH4)x composites are synthesized by ball milling of MgH2 and cheap metaborates. Different ball-milled durations of NaBO2 metaborate and electronegativities (χp) of cation elements of metaborates (i.e., KBO2, NaBO2, LiBO2, Ca(BO2)2, and Mg(BO2)2) were compared to reveal that the MgH2–4 mol % NaBO2 composite after 6 h ball milling has the best hydrolysis performance. Specifically, it could release 1597.2 mL g–1 H2 (95% theoretical H2) in 60 min with a fast hydrolysis rate of 1216 mL g–1 min–1 H2 during the first minute of the hydrolysis at 55 °C. Our finding is expected to facilitate the application of MgH2 for on-site hydrogen generation.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
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IF 4.084
Liang Dan,Long Hu,Hui Wang,Min Zhu
To improve the hydrogen sorption kinetics of MgH 2 , the MoO 3 nanobelts were added into MgH 2 by mechanical milling, leading to fine distribution of MoO 3 in the MgH 2 matrix. Compared to uncatalyzed MgH 2 , the hydriding and dehydriding rates of MoO 3 -catalyzed MgH 2 were significantly improved. The MgH 2 doped with 2 mol% MoO 3 exhibited fast dehydrogenation without activation, and the initial dehydrogenation amount of 5 wt% could be reached within 900 s at 300 °C. The dehydrogenation apparent activation energy is decreased down to 114.7 kJ/mol. The excellent catalytic effect of MoO 3 originates from its specific role as fast hydrogen diffusion pathways. In the hydrogenation process , the MoO 3 transformed to MoO 2 , resulting in the fading of catalytic activity .
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yongyang Zhu,Shaoyang Shen,Liuzhang Ouyang,Jiangwen Liu,Hui Wang,Zhenguo Huang,Min Zhu
Magnesium borohydride (Mg(BH 4 ) 2 ) is widely regarded as a promising hydrogen storage material due to its high capacity; however, it is still challenging to synthesize Mg(BH 4 ) 2 with low cost. Traditionally, Mg(BH 4 ) 2 has been mainly produced using other borohydride as the starting materials via exchange reactions. Herein, we report an economical method to synthesize Mg(BH 4 ) 2 by converting B-O bonds in widely available borates or boric acid to B-H. The borates or boric acid is ball-milled with MgH 2 under ambient conditions to form Mg(BH 4 ) 2 with high yield (>80%). Mg(BH 4 ) 2 was also successfully generated by reacting low-cost Mg with boric acid. Compared with previous approaches, this method avoids expensive boron sources such as LiBH 4 , NaBH 4 , and B 2 H 6 , and does not require high pressure H 2 gas and high temperatures, and therefore significantly reduces costs. This method could be an alternative to the current Mg(BH 4 ) 2 synthesis processes.
研究领域:
材料科学
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化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
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IF 9.4
Weitao Shi,Feifan Hong,Renhuan Li,Ruolin Zhao,Sizhi Ding,Ziqi Liu,Peilin Qing,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
MgH 2 is a promising high-capacity solid hydrogen storage material. In this work, MnO 2 -doped Ti 3 C 2 (Ti 3 C 2 @MnO 2 ) was synthesized and used as a catalyst to improve the hydrogen storage performance of MgH 2 . We found that the dehydrogenated 10 wt% Ti 3 C 2 @MnO 2 -doped MgH 2 sample exhibited good hydrogen adsorption ability even at room temperature (30 °C), and could absorb 5.13 wt% of hydrogen in 400 s at 75 °C. The re‑hydrogenated Ti 3 C 2 @MnO 2 -doped MgH 2 sample started to release hydrogen at 182 °C and required 484 s to completely release hydrogen at 275 °C with a dehydrogenation capacity of 6.4 wt%. The Ti 3 C 2 @MnO 2 composite did not change the thermodynamic properties of MgH 2 . In the MgH 2 + Ti 3 C 2 @MnO 2 sample, Ti 3 C 2 , TiO 2 , MnO 2 , MnO, and Mn combined with MgH 2 to form Ti 3 C 2 /MgH 2 , TiO 2 /MgH 2 , MnO 2 /MgH 2 , MnO/MgH 2 , and Mn/MgH 2 multiphase interfaces, which improved the hydrogen storage performance of MgH 2 . The findings of this work may provide a new strategy for preparing novel and efficient catalysts for hydrogen storage applications.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）