Materials Today Communications
·
2022
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IF 3.662
Yingjun Li,Yakun Guo,Zekun Jing,Xingtao Zhao,Yuanlin Zhou,Maobing Shuai
To solve the problems of hydrogen embrittlement and explosion risk generated by the use of hydrogen energy in large-scale applications, organic hydrogen getters have been used to eliminate hydrogen in sealed systems and related fields. However, the hydrogen absorption rate of existing hydrogen getters needs to be further improved. Herein, a three-dimensional (3D) N-doped carbon with interconnected hierarchical pores loaded with a uniform dispersion of palladium particles (6.8 nm) was successfully developed. This material was used as a catalyst for 1,4-bis(phenylethynyl)benzene (DEB) hydrogenation under mild conditions, exhibiting good catalytic performance. The hydrogen uptake performance of this Pd/MFC/DEB getter for the reduction of hydrogen gas was examined at 0 – 1 bar and 25 ℃ with hydrogen consumption evaluated with time. The prepared Pd/MFC/DEB getter demonstrated a hydrogen uptake of 212.2 cm 3 /g after about 20 h, which was significantly higher than that of a typical Pd/AC/DEB pallet getter (162.0 cm 3 /g). This was due to the interactions between the Pd and MFC support, which enhanced the dispersion of Pd, increased the area available for the reaction with DEB, promoted the hydrogen dissociation process, and improved the hydrogen spillover effect. This research offers a highly promising approach for the use of MFC as a catalyst support material in hydrogen getters.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2017
·
IF 4.636
Tianxin Li,Qian Li,Hongyu Long,Kuo-Chih Chou,Qun Luo
A modified Chou model with parameters of temperature ( T ), initial hydrogen pressure ( P 0 ), enthalpy change (Δ H ) and entropy change (Δ S ) is proposed in consideration of thermodynamic driving force. The meaningful activation energy E v can be calculated for the negative temperature dependence of hydriding reaction in hydrogen storage materials. This model is verified by the hydriding/dehydriding experimental data of (LaNi 5 ) 1− x Mg x ( x = 0, 0.018, 0.041, 0.063). The calculated results indicate that the hydriding kinetics of (LaNi 5 ) 1− x Mg x alloys are controlled by diffusion of hydrogen atom in hydride. The addition of small amount of magnesium improves the kinetic performance of LaNi 5 slightly. Furthermore, the modified Chou model was compared with the previous model that successfully explain the negative temperature depending hydrogenation reaction of Mg-based alloys. The fitting results show that the modified Chou model can describe the hydrogen absorption kinetic mechanism of negative temperature dependent materials more accurately.
研究领域:
材料科学
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能源化学
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物理化学
·
合金设计
·
储氢技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiabao Bai,Yaoyu Du,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Rui Shi,Jun Wang,Zhixin Ba,Wenrong Cai
In this work, a three-dimensional network LaCoO3 (3D LaCoO3) was successfully synthesized by the colloidal crystal template technique and used for optimizing the de/hydrogenation performance of magnesium hydride (MgH2). 3D LaCoO3 displays a unique three-dimensional network macroporous structure with interconnected pores, where LaCoO3 nanoparticles (10–20 nm) are homogeneously anchored on the macroporous pore walls. Remarkably, MgH2 doped with 5 wt % 3D LaCoO3 can quickly release 6.06 wt % H2 at 300 °C within 1200 s and absorb 6.13 wt % H2 at 175 °C within 1800 s. Furthermore, MgH2-5 wt % 3D LaCoO3 exhibits a capacity retention rate of 98.12% after 10 cycles, indicating excellent reversibility. The superior catalytic performance originates from the unique 3D network structure of 3D LaCoO3 and the in situ formed Co/La4Co3O9 heterostructure during the first dehydrogenation process. The 3D network structure can make a more uniform distribution of the catalyst during ball milling, leading to more catalytic active sites. The experimental results prove that the in situ formed Co/La4Co3O9 heterostructure plays a key role in enhancing the de/hydrogenation performance of MgH2. Additionally, the DFT calculation results confirm that the Co/La4Co3O9 heterostructure exhibits a higher hydrogen absorption ability due to significant electron transfer between the Co and La4Co3O9 interfaces, which can facilitate the hydrogen absorption and desorption of MgH2. These findings provide a fresh approach to designing and preparing catalysts with distinctive morphologies for MgH2-based systems.
研究领域:
材料科学
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能源存储
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纳米技术
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催化
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氢能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Magnesium and Alloys
·
2021
·
IF 10.088
Hui Yong,Xin Wei,Jifan Hu,Zeming Yuan,Shihai Guo,Dongliang Zhao,Yanghuan Zhang
The composites comprised of Co nanoparticle and C nanosheet were prepared though a high-temperature carbonization reaction. The catalysis of Co@C composites on the hydrogen storage behavior of Mg 90 Ce 5 Y 5 alloy was investigated in detail by XRD, SEM, TEM, PCI, and DSC method. Because of the synergistic catalytic function of C and Co in C@Co nanocomposites, the Mg 90 Ce 5 Y 5 alloy with 10 wt.% C@Co shows the excellent hydrogen absorption and desorption performances. Time for releasing hydrogen reduces from 150 min to 11 min with the addition of the C@Co composites at the temperature of 300 °C. Meanwhile, the dehydrogenation activation energy also declines from 130.3 to 81.9 kJ mol −1 H 2 after the addition of the C@Co composites. This positive effect attributes to the C layer with the high defect density and the Co nanoparticles, which reduces the energy barriers for the nucleation of Mg/MgH 2 phase and the recombination of hydrogen molecule. Besides, the C@Co composites also improve the activation property of the Mg 90 Ce 5 Y 5 alloy which was fully activated in the first cycle. Moreover, the temperature for initial dehydrogenation and the endothermic peak of the alloy hydride were also decreased. Although the addition of the C@Co composites increases the plateau pressures and decreases the value of the decomposition enthalpy, these differences are so small that the improvement on thermodynamics can hardly be seen.
研究领域:
材料科学
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化学工程
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能源存储
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2024
·
IF 9.4
Linxin Zheng,Shuai Li,Liuting Zhang,Tao Zhong,Xiuzhen Wang,Ting Bian,Petr Senin,Ying Wu
Magnesium hydride (MgH 2 ) demonstrates immense potential as a solid-state hydrogen storage material, while its commercial utilization is impeded by the elevated operating temperature and sluggish reaction kinetics. Herein, a MOF derived multi-phase FeNi 3 -S catalyst was specially designed for efficient hydrogen storage in MgH 2 . Experiments confirmed that the incorporation of FeNi 3 -S into MgH 2 significantly lowered the desorption temperature and accelerated the kinetics of hydrogen desorption and reabsorption. The initial dehydrogenation temperature of the MgH 2 + 10 wt% FeNi 3 -S composite was 202°C, which was 123°C lower than that of pure MgH 2 . At 325°C, the MgH 2 + 10 wt% FeNi 3 -S composite released 6.57 wt% H 2 (fully dehydrogenated) within 1000 s. Remarkably, MgH 2 + 10 wt% FeNi 3 -S composite initiated rehydrogenation at room temperature and rapidly absorbed 2.49 wt% H 2 within 30 min at 100°C. Moreover, 6.3 wt% H 2 was still retained after 20 cycles at 300°C, demonstrating the superior cycling performance of the MgH 2 + 10 wt% FeNi 3 -S composite. The activation energy fitting calculations further evidenced the addition of FeNi 3 -S enhanced the de/resorption kinetics of MgH 2 ( E a = 98.6 kJ/mol and 43.3 kJ/mol respectively). Through phase and microstructural analysis, it was determined that the exceptional hydrogen storage performance of the composite was attributed to the in-situ formation of Mg/Mg 2 Ni + Fe/MgS and MgH 2 /Mg 2 NiH 4 + Fe/MgS hydrogen storage systems. Further mechanistic analysis revealed that Mg 2 Ni/Mg 2 NiH 4 served as “hydrogen pump” and Fe/MgS served as “hydrogen diffusion channel”, thus accelerating the dissociation and recombination of hydrogen molecules. In conclusion, this work offers insight into catalysts combining transition metal alloys and transition metal sulfide for exerting muti-phase synergistic effect on boosting the dehydrogenation/hydrogenation reactions of MgH 2 , which can also inspire future pioneering work on designing and fabricating high efficient catalysts in other energy storage related areas.
研究领域:
材料科学
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能源存储
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Houqun Xiao,Luocai Yi,Huxu Lei,Yu Xu,Xiaoxuan Zhang,Huazhou Hu,Ruizhu Tang,Qian Li,Qingjun Chen
Magnesium hydride (MgH 2 ) has garnered significant attention as a promising material for high-capacity hydrogen storage. However, its commercial application remains challenging due to the high operating temperature and slow reaction kinetics. In this study, melt-spun Ti 45 Cr 40 Nb 15 (with a BCC phase) hydride (designated as TiCrNbH x− MS) was synthesized and used to form a nano-multiphase composite to improve the de-/rehydrogenation properties of MgH 2 through ball milling. The incorporation of TiCrNbH x− MS was shown to significantly enhance the hydrogen de-/rehydrogenation properties of MgH 2 . The MgH 2 + 20 wt% TiCrNbH x− MS composite exhibits an appealing initial dehydrogenation temperature of 163 °C and can absorb hydrogen at room temperature. Notably, it releases 5.8 wt% hydrogen in 700 s at 230 °C and recharges 4.3 wt% hydrogen in just 2 mins at 150 °C. Even after 100 cycles, it retains a reversible hydrogen capacity of 4.98 wt%. Kinetic analysis revealed that the dehydrogenation rate follows the Chou surface penetration model. Microstructural analysis showed that the FCC phase of the melt-spun TiCrNbH x− MS hydride reversibly transformed into the BCC phase during the de-/rehydrogenation process in the composite. Numerous phase interfaces were generated and uniformly dispersed on the MgH 2 surface, providing additional hydrogen diffusion pathways and heterogeneous nucleation sites for Mg/MgH 2 , thereby further improving the hydrogen de-/rehydrogenation kinetics of the system. This study offers valuable insights into the use of multiphase composites to enhance MgH 2 performance.
研究领域:
材料科学
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储能
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纳米技术
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催化
·
氢能
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Lu Wen,Chaojie Li,Houqun Xiao,Huazhou Hu,Ruizhu Tang,Chengsi Hu,Chuanming Ma,Chaobin Lai,Luocai Yi,Qingjun Chen
The ZrCo alloy, considered an ideal candidate material for hydrogen (or its isotope) storage to replace uranium in the ITER, faces challenges due to its susceptibility to hydrogen-induced disproportionation, which leads to a diminished cycling life. To address this, we investigated the substitution of V and Cr for Zr and Co. Our study reveals that this substitution not only refines the grain size and expands the lattice constant but also significantly enhances the kinetics of hydrogen absorption. Notably, the Zr 0.95 V 0.05 Co 0.85 Cr 0.15 alloy demonstrates a remarkable 98.8 % reduction in the time required to absorb 90 % of its full capacity compared to ZrCo. This alloy also exhibits superior isotope effects under H 2 and D 2 environments, along with lower enthalpy and entropy for dehydrogenation, contributing to a reduced dehydrogenation temperature and enhanced resistance to disproportionation. After 50 cycles of hydrogen absorption and desorption, the hydrogen storage capacity of Zr 0.95 V 0.05 Co 0.85 Cr 0.15 alloys decreases by only 5.7 %, significantly outperforming other reference samples and demonstrating its exceptional anti-disproportionation capability. These results indicate that the Zr 0.95 V 0.05 Co 0.85 Cr 0.15 alloy exhibits the best resistance to hydrogen-induced disproportionation. Moreover, post-50 cycling analysis confirms that the phase of the alloy is still dominated by the ZrCo phase, indicating its excellent structural stability. Our findings offer valuable insights into optimizing ZrCo-based alloys for enhanced hydrogen storage performance and cycling stability, providing potential references for advancements in hydrogen isotope storage materials design.
研究领域:
材料科学
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氢能存储
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金属间化合物
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固态储氢
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核聚变材料
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2022
·Vol. 29
·期 7
·1464-1473
·
IF 3.85
Song Mengchen,Zhang Liuting,Zheng Jiaguang,Yu Zidong,Wang Shengnan
Novel graphene-supported FeOOH nanodots (FeOOH NDs@G) were successfully prepared by a facile hydrothermal method and doped into MgH 2 through mechanical ball-milling. MgH 2 with 10wt% FeOOH NDs@G began to release hydrogen at 229.8°C, which is 106.8°C lower than that of pure MgH 2 . The MgH 2 -10wt% FeOOH NDs@G composite could reversibly absorb 6.0wt% hydrogen at 200°C under a 3.2 MPa hydrogen pressure within 60 min. With the addition of FeOOH NDs@G, the dehydrogenation and hydrogenation activation energy of MgH 2 was decreased to 125.03 and 58.20 kJ·mol −1 (156.05 and 82.80 kJ·mol −1 for pure MgH 2 ), respectively. Furthermore, the hydrogen capacity of the FeOOH NDs@G composite retained 98.5% of the initial capacity after 20 cycles, showing good cyclic stability. The catalytic action of FeOOH NDs@G towards MgH 2 could be attributed to the synergistic effect between graphene nanosheets and in-situ formed Fe, which prevented the aggregation of Mg/MgH 2 particles and accelerated the hydrogen diffusion during cycling, thus enabling the MgH 2 -10wt% FeOOH NDs@G composite to exhibit excellent hydrogen storage performance.
研究领域:
材料科学
·
氢存储
·
纳米材料
·
催化
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Hailiang Chu,Chengwang Yin,Yongpeng Xia,Yong Shen Chua,Shujun Qiu,Fen Xu,Lixian Sun
While magnesium hydride (MgH 2 ) is widely acknowledged as an encouraging solid-state hydrogen storage material , its practical utility is hampered by the elevated operating temperatures and sluggish kinetic characteristics. To address these limitations, a composite catalyst consisting of Ni nanoparticles (NPs) deposited onto TiO 2 microspheres (Ni/TiO 2 -MS) was developed and employed as a catalytic agent to enhance the hydrogen desorption and absorption properties of MgH 2 . Remarkably, the introduction of Ni/TiO 2 -MS resulted in a significant reduction of the initial dehydrogenation temperature of MgH 2 to 181.4 °C, demonstrating a decrease of 78.2 °C compared to ball-milled MgH 2 (BM-MgH 2 ). The optimal BM-MgH 2 -Ni/TiO 2 -MS facilitated the desorption of 6.3 wt % of hydrogen within 5 min at 300 °C, while at 150 °C, its dehydrogenated product could absorb 5.4 wt % of hydrogen in only 1 minute. Moreover, the BM-MgH 2 -Ni/TiO 2 -MS sample exhibited remarkable cycling stability over 20 cycles. Through the mechanistic analysis, the simultaneous presence of in-situ formation of Mg 2 Ni/Mg 2 NiH 4 and multivalent titanium species engendered a synergistically catalytic effect, significantly enhancing the hydrogen storage capabilities of MgH 2 . This study affords a very potential strategy for the design of active catalysts aimed at enhancing the hydrogen dehydrogenation/absorption kinetics of MgH 2 .
研究领域:
储能
·
纳米材料
·
催化
·
氢能
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiefei Ding,Xin Ding,Xinxiu Wang,Guanglong Li,Xianglong Meng,Yong Zhang,Ruirun Chen
The application of Mg-based hydrides in portable and stationary energy storage is primarily hindered by sluggish sorption kinetics and unfavorable cycle stability. Herein, an attempt is made to enhance the hydrogen storage properties of MgSc alloy by the addition of TiO 2 nanoparticles to regulate multivalent‑oxygen vacancy. The formation of Sc 2 O 3 and MgTi 2 O 4 phases during heat treatment act as active sites, facilitating hydrogen absorption in the initial stages. Notably, MgSc-TiO 2 demonstrates a rapid rate of de/hydrogenation. The absorption capacity in the first cycle is 6.5 wt%, and releases 6.3 wt% H 2 within just 5 min. TiO 2 doping significantly improves the kinetics and cycling stability of the hydrogen absorption and desorption reaction, achieving a reversible capacity of 6.14 wt% at 320 °C. After 10 cycles, the capacity remains 6.32 wt% without visible decay. The improvement is attributed to the solid solution effect of Sc, the multivalent of Ti, the acceleration of electron transfer by oxygen vacancies and the alleviation of volume expansion stress by MgTi 2 O 4 . Ti hydrides participate in the de/hydrogenation reaction. Additionally, multivalent Ti contributes to electron transfer between Mg 2+ and H − , thereby weakening the stability of Mg H bond. Oxygen vacancies enhance the absorption of hydrogen and accelerate H atoms diffusion.
研究领域:
材料科学
·
能量存储
·
纳米技术
·
储氢合金
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Dongqiang Gao,Liuting Zhang,Mengchen Song,Fuying Wu,Jiao Wang,Hu Zhao,Hong Li
As a high-density solid-state hydrogen storage material, magnesium hydride (MgH 2 ) is promising for hydrogen transportation and storage. Yet, its stable thermodynamics and sluggish kinetics are unfavorable for that required for commercial application. Herein, nickel/vanadium trioxide (Ni/V 2 O 3 ) nanoparticles with heterostructures were successfully prepared via hydrogenating the NiV-based two-dimensional layered double hydroxide (NiV-LDH). MgH 2 + 7 wt% Ni/V 2 O 3 presented more superior hydrogen absorption and desorption performances than pure MgH 2 and MgH 2 + 7 wt% NiV-LDH. The initial discharging temperature of MgH 2 was significantly reduced to 190 °C after adding 7 wt% Ni/V 2 O 3 , which was 22 and 128 °C lower than that of 7 wt% NiV-LDH modified MgH 2 and additive-free MgH 2 , respectively. The completely dehydrogenated MgH 2 + 7 wt% Ni/V 2 O 3 charged 5.25 wt% H 2 in 20 min at 125 °C, while the hydrogen absorption capacity of pure MgH 2 only amounted to 4.82 wt% H 2 at a higher temperature of 200 °C for a longer time of 60 min. Moreover, compared with MgH 2 + 7 wt% NiV-LDH, MgH 2 + 7 wt% Ni/V 2 O 3 shows better cycling performance. The microstructure analysis indicated the heterostructural Ni/V 2 O 3 nanoparticles were uniformly distributed. Mg 2 Ni/Mg 2 NiH 4 and metallic V were formed in-situ during cycling, which synergistically tuned the hydrogen storage process in MgH 2 . Our work presents a facile interfacial engineering method to enhance the catalytic activity by constructing a heterostructure, which may provide the mentality of designing efficient catalysts for hydrogen storage.
研究领域:
材料科学
·
能源存储
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Haoyuan Zheng,Yuxiao Jia,Chen Jin,Hang Che,Chia-TseLee,Guang Liu,Li Wang,Yuyuan Zhao,Shixuan He,Haizhen Liu,Xinhua Wang,Yifeng Yu,Mi Yan
The magnesium based metal hydrogen storage composite system Mg(NH 2 ) 2 -2LiH has a theoretical hydrogen storage capacity of 5.6 wt.% and is a promising hydrogen storage material for vehicles. However, its application is limited due to serious thermodynamic and kinetic barriers. Introducing efficient catalysts is an effective method to improve the hydrogen storage performance of Mg(NH 2 ) 2 -2LiH. This article investigates for the first time the use of nano rare earth oxide CeO 2 (∼44.5 nm) as an efficient modifier, achieving comprehensive regulation of the hydrogen storage performance of Mg(NH 2 ) 2 -2LiH composite system through oxygen vacancy driven catalysis. The modification mechanism of nano CeO 2 is also systematically studied using density functional theory (DFT) calculations and experimental results. Research has shown that the comprehensive hydrogen storage performance of the Mg(NH 2 ) 2 -2LiH-5 wt.% CeO 2 composite system is optimal, with high hydrogen absorption and desorption kinetics and reversible performance. The initial hydrogen absorption and desorption temperatures of the composite system were significantly reduced from 110/130°C to 65/80°C, and the release of by-product ammonia was significantly inhibited. Under the conditions of 170°C/50 min and 180°C/100 min, 4.37 wt.% of hydrogen can be rapidly absorbed and released. After 10 cycles of hydrogen release, the hydrogen cycle retention rate increased from 85% to nearly 100%. Further mechanistic studies have shown that the nano CeO 2− x generated in situ during hydrogen evolution can effectively weaken the Mg–N and N–H bonds of Mg(NH 2 ) 2 , exhibiting good catalytic effects. Meanwhile, oxygen vacancies provide a fast pathway for the diffusion of hydrogen atoms in the composite system. In addition, nano CeO 2− x can effectively inhibit the polycrystalline transformation of the hydrogen evolving product Li 2 MgN 2 H 2 in the system at high temperatures, reducing the difficulty of re-hydrogenation of the system. This study provides an innovative perspective for the efficient modification of magnesium based metal hydrogen storage composite materials using rare earth based catalysts, and also provides a reference for regulating the comprehensive hydrogen storage performance of hydrogen storage materials using rare earth catalysts with oxygen vacancies.
研究领域:
材料科学
·
催化
·
氢气存储
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）