INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yuan Zhao,Qingshuang Wang,Dongming Yin,Shouliang Li,Chunli Wang,Long Liang,Shaolei Zhao,Chunmin Zhang,Limin Wang,Yong Cheng
The high dehydrogenation temperature of α-AlH 3 has always been an important factor hindering its development. In order to solve this problem, we synthesize Bi-MOF by hydrothermal method and burn it under inert gas to obtain Bi@C, which is used as catalyst ( x Bi@C, x = 3, 5 and 7 wt%) to improve the hydrogen desorption performance of α-AlH 3 . The dehydrogenation onset temperature of α-AlH 3 +5 wt% Bi@C drop to 80.4 °C, which is reduced by 43.4% compared with pure α-AlH 3 . At 120 °C, it can provide a stable hydrogen capacity of 7.45 wt%. In contrast, pure α-AlH 3 releases only 6.66 wt% hydrogen at the same time. The density functional theory calculations further indicate that the existence of Bi@C catalyst can make the Al–H bond length increase, more conducive to the release of hydrogen. The results show that the synergistic effect of Bi and porous carbon in Bi@C materials can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage .
研究领域:
材料科学
·
氢能存储
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DOI
高影响因子
Nano Research
·
2024
·
IF 9.5
Zhao Yuan,Wang Qingshuang,Yin Dongming,Wang Xiaoli,Li Shouliang,Wang Chunli,Liang Long,Zhao Shaolei,Wang Limin,Cheng Yong
α-AlH 3 is regarded as one of the most promising hydrogen storage materials due to its high hydrogen storage capacity (10.1 wt.%, 148 kg·m −3 ). However, in practical applications, the associated hydrogen release temperature remains relatively high. To effectively address this issue, hollow structured Fe@C nanorods derived from Fe-MOF are introduced as highly efficient catalyst to optimize the dehydrogenation properties of α-AlH 3 . Comparatively, the initial hydrogen release temperature of α-AlH 3 + 3 wt.% Fe@C is reduced to 94.2 °C, which is significantly lower than that of pure α-AlH 3 (137.8 °C). At 100 and 120 °C, it exhibits hydrogen capacities of 5.38 wt.% and 7.47 wt.%, respectively, whereas pure α-AlH 3 only delivers hydrogen capacities of 0.24 wt.% and 5.94 wt.% under the same temperatures. The density functional theory (DFT) calculations further indicate that the existence of Fe@C catalyst can make the length of Al–H bond increase, which is more conducive to the release of hydrogen. The results show that the synergistic effect of Fe and porous carbon in Fe@C nanorods can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage fields.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Zhongxuan Lin,Zhenluo Yuan,Huanhuan Zhang,Shuyan Guan,Xiaojiao Wang,Shiqian Zhao,Guangxin Fan,Yanping Fan,Baozhong Liu
Lowering the dehydrogenation temperature and maintaining high dehydrogenation capacity are greatly hindering the practical application of α-AlH 3 for the hydrogen fuel cell industry. Herein, the layered accordion-like V 2 C MXene is synthesized and doped into α-AlH 3 by mild ball milling . The 1 wt.% V 2 C-catalyzed α-AlH 3 possesses excellent dehydrogenation performance with a low initial decomposition temperature of 70.5 °C and a high hydrogen release capacity of 8.1 wt.%. Furthermore, 7.8 wt.% of hydrogen could be quickly released from α-AlH 3 -1 wt.% V 2 C composite within 15 min at 120 °C, with a lower activation energy of 69.5 kJ/mol than that of as-received sample. The excellent dehydrogenation performance is attributed to the high activity of the zero valence V catalyst which is transformed from the multivalent V during ball milling and to promote dissociation and reorganization of hydrogen. This effective approach significantly enhances the dehydrogenation of α-AlH 3 , providing a hopeful approach for modifying metal hydrides .
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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纳米材料
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储氢材料
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DOI
高影响因子
ChemNanoMat
·
2023
·Vol. 9
·期 5
·e202300011
·
IF 3.8
Zhe Shi,Taojie Lu,Yinghui Hu,Yidong Xu,Xuwen Wang,Zhuo Wu,Jian Zheng,Jian Zhang,Zhaoyang Zhu,Kaifeng Lin,Yulin Yang
Graphical The encapsulation of pyrotechnic binder on the α-AlH 3 surface by a solvent/antisolvent method is a means to address its stability and safety, laying the foundation for its application in solid propellants. Alpha-aluminum hydride (α-AlH 3 ) is an ideal energetic combustion agent, but its poor stability and safety limit its application. Therefore, we prepare different composites by using the solvent/anti-solvent method to coat different pyrotechnic binders on the surface of α-AlH 3 . The vacuum stability test show that the minimum outgassing of Shellac-coated α-AlH 3 composite is only 1.2 mL/g at 50 °C for 6 days. Due to the good electrical insulation properties of Viton, Viton-coated α-AlH 3 composite have the highest E 50 value of electrostatic sensitivity. In addition, the pyrotechnic binders coating not only protects the activity of the α-AlH 3 but also effectively increases its burning rate. Viton-coated α-AlH 3 composite have more gaseous products and maximum flame area during combustion. This study illustrates that α-AlH 3 coated with pyrotechnic binders is a means to address its stability and safety, laying the foundation for its application in solid propellants.
研究领域:
材料科学
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化学工程
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航空航天工程
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产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Peihui Xu,Xueling Yuan,Jianzhong Liu,Hui Liu,Junhu Zhou
Aluminum hydride (alane, AlH 3 ) is a promising energetic material that can significantly increase the specific impulse of propellants while lowering the combustion temperature. In this work, a CO 2 laser was adopted to investigate the effect of α-AlH 3 content on the ignition and combustion characteristics of AlH 3 –Al, AlH 3 –ammonium perchlorate (AP), AlH 3 –Al–AP, and AlH 3 –Al–AP–hydroxyl-terminated polybutadiene (HTPB) mixtures (namely, samples D Al , D AP , T, and Q, respectively). The D Al samples formed a mushroom flame at the beginning of combustion due to the Kelvin-Helmholtz effect under the heat flow generated by the combustion of H 2 released from AlH 3 . The rapid hydrogen release caused the flame to break away from the sample to form a “dark zone”, whose height gradually shortened. The high AlH 3 content promoted the decomposition of HTPB to C 4 species, resulting in a “dark zone” for Q samples during ignition. The D AP and T samples combusted intensely with lower ignition delay time ( t i ) and combustion time ( t c ) and higher maximum combustion temperature ( T max ) than the other two samples due to the AP. The combustion temperatures of the mixed samples were effectively decreased, while the combustion rates were also accelerated by partially replacing Al with AlH 3 . As the rate of AlH 3 :Al was increased from 1:3 to 3:1, the T max of the D Al , T, and Q samples decreased by 113, 276, and 128 K, respectively, whereas t c decreased by 16.18 %, 32.11 %, and 8.18 %, respectively. However, the t i of the Q samples increased with increasing AlH 3 , probably because a large amount of hydrogen release exacerbated the effect of the porous layer, thus hindering the escape of the gas phase products. In addition, only weak Al(g) characteristic emission spectra were observed during combustion, which is due to the HTPB adhesion largely inhibiting the combustion of metallic fuels.
研究领域:
能源材料科学
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燃烧学
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推进剂技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Shiming Xu,Jintang Duan,Lianfang Feng,Xueping Gu,Cailiang Zhang,Liu Liu
The widespread implementation of hydrogen energy is critically constrained by the challenge of storage. Aluminum hydride (α-AlH 3 ), a binary hydride stable under ambient conditions with high volumetric hydrogen density, represents a promising candidate. However, when it is traditionally prepared from lithium aluminum hydride (LiAlH 4 ) and aluminum chloride (AlCl 3 ), the process is cost-prohibitive for scale-up. This study presents a cost-effective synthesis strategy by systematically investigating the effects of different molar ratios of LiAlH 4 /NaAlH 4 /AlCl 3 (4:0:1, 1:3:1, 0.5:3.5:1, 0:4:1). Results indicate that the introduction of LiAlH 4 significantly enhances reaction efficiency and kinetics. The optimal ratio of 1:3:1 effectively compensated for the slower kinetics of NaAlH 4 , achieving over 94% conversion of AlCl 3 to AlH 3 ·nEt 2 O etherate. Desolvation studies revealed that AlH 3 ·nEt 2 O derived from NaAlH 4 required higher temperatures for complete phase transformation, whereas systems with LiAlH 4 content below 25% were insufficient to effective desolvation. The α-AlH 3 crystals produced from the 1:3:1 ratio exhibited a well-defined cubic morphology and high thermal stability, with a decomposition temperature of 165 °C. By replacing 75% of the costly LiAlH 4 with NaAlH 4 , this hybrid approach achieved an approximately 50% reduction in the material cost. These findings provide critical process parameters and a viable pathway for the cost-effective, large-scale production of high-performance α-AlH 3 for hydrogen storage applications.
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DOI
高影响因子
FirePhysChem
·
2024
·
IF 0
Jiashuai Wang,Bo Wu,Lingfeng Yang,Yuan Bian,Renjie Li,Ke Zeng,Juan Zhu,Liangyou Zhao,Jinpeng Shen,Chonghua Pei
Thermites are widely used in propellants, explosives and ignition materials because of their high heat release rate and good combustion efficiency. Structural control over thermites to achieve improved performance leads to a promising research area. Among these, core-shell structured composites have attracted wide attention due to their excellent properties and close contact among components. Herein, core-shell structured α -AlH 3 /Fe 2 O 3 thermites were prepared, which exhibit high heat-release and excellent combustion performance. At an equivalence ratio of 2.0, the core-shell structured α -AlH 3 /Fe 2 O 3 has the most heat release (1213.8 J/g) and the lowest reaction activation energy (147.5 kJ/mol). The ignited combustion performance of α -AlH 3 /Fe 2 O 3 was notably strengthened by the shorter ignition delay period (11 ms). Interestingly, the core-shell structured α -AlH 3 /Fe 2 O 3 was less sensitive to electrostatic discharge, which suggests that the core-shell structured α -AlH 3 /Fe 2 O 3 reaches the goal of high energy release and electrostatic safety. The core-shell thermite system with α -AlH 3 as metal fuel could provide an efficient alternative to hunt for thermites with high reactivity.
研究领域:
材料科学
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化学工程
·
能源技术
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DOI
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Long Liang,Chunli Wang,Mingan Ren,Shouliang Li,Zhijian Wu,Limin Wang,Fei Liang
The pivotal steps for the practical application of dehydrogenation of aluminum hydride (AlH3) have been to decrease the temperature and increase the content of AlH3. Herein, the initial dehydrogenation temperature of AlH3 decreased to 43 °C with the amount of released hydrogen of 8.3 wt % via introducing TiO2 and Pr6O11 with synergistic catalysis effects, and its apparent activation energy of the dehydrogenation reaction decreased to 56.1 kJ mol–1, which is 52% lower than that of pure AlH3. These differences in performances of the samples are further evaluated by determining the electron density of Al–H bonds during dehydrogenation. The multiple valence state conversions of TiO2 and Pr6O11 promoted the electron transfer of H in AlH3, and a novel dehydrogenation pathway of PrH2.37 formed simultaneously, which could accelerate the breakage of Al–H bonds. The density functional theory calculations further exhibit that there are fewer electrons around H in AlH3 and the Al–H bond energy is weaker at the atomic levels, which is more conducive to the release of hydrogen. A higher hydrogen storage capacity and a lower dehydrogenation temperature make AlH3 one of the most promising hydrogen source media for mobile applications.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 47
·22729-22738
·
IF 3.925
Zhe Shi,Taojie Lu,Yidong Xu,Fei Shang,Yinghui Hu,Zhuo Wu,Jian Zhang,Zhaoyang Zhu,Jian Zheng,Kaifeng Lin,Yulin Yang
In this study, various polymer materials, such as polystyrene (PS), polymethyl acrylate (PMA), and polyvinyl pyrrolidone (PVP), are successfully encapsulated on the surface of alpha-aluminum hydride (α-AlH3) by the in situ polymerization method. The different polymers on the surface of α-AlH3 can lead to a tremendous enhancement of the material in terms of different properties. Due to the good heat resistance of PS, α-AlH3@PS composites take 625.25 min to lose 1% mass, and the activation energy increased by 11.72 kJ mol−1 compared with that before coating, showing good thermal stability. The high degree of cross-linking polymerization of PMA on the surface isolates α-AlH3 from an external environment, enabling it to maintain a high heat of combustion even after extreme humidity and heat treatment respectively. In addition, PVP has a high adsorption capacity for α-AlH3, which can not only improve the thermal and wet stability of α-AlH3 but also increase its electrostatic susceptibility from 24.6 mJ to 163.2 mJ. The in situ polymerization of encapsulated α-AlH3 has promising applications in aerospace and weapon fields, and the resulting α-AlH3@PVP has potential applications in solid propellant formulations.
研究领域:
材料科学
·
航空航天工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Haoyuan Zheng,Hua Ning,Chen Jin,Shuzhong Wang,Yadong Wang,Shixuan He,Haizhen Liu,Rui Tang,Xinhua Wang
α -phase AlH 3 , as a high-capacity hydrogen storage material (10.01 wt%), is often used in the hydrogen fuel cell industry. However, its high dehydrogenation temperature remains difficult to match with the operating temperature of proton exchange membranes. Designing efficient catalysts can effectively improve the dehydrogenation performance of AlH 3 , enabling low-temperature dehydrogenation by destabilizing it. In this work, a two-dimensional transition metal carbide V 4 C 3 with a layered structure was designed. Using V 4 AlC 3 as a precursor, two-dimensional V 4 C 3 was prepared via hydrofluoric acid etching. The AlH 3 –V 4 C 3 composite material was constructed by combining V 4 C 3 with AlH 3 through mild ball milling, which significantly enhanced the dehydrogenation performance of AlH 3 . With an optimal additive ratio (+3 wt% V 4 C 3 ), AlH 3 began to release hydrogen at temperatures as low as 47°C, exhibited a dehydrogenation peak temperature of only 110.2°C, and achieved a final hydrogen release capacity of 8.37 wt%. In isothermal dehydrogenation kinetic tests, the dehydrogenation capacity of V 4 C 3 -modified AlH 3 within 60 min at 120°C was significantly increased from 2.11 wt% to 7.50 wt%, and the activation energy for dehydrogenation was reduced from 88.5 kJ/mol to 35.7 kJ/mol, demonstrating remarkable improvement in isothermal dehydrogenation performance. The mechanism behind the improved dehydrogenation of AlH 3 by V 4 C 3 was investigated through a combination of characterization techniques and density functional theory (DFT) calculations. The results indicate that V 4 C 3 effectively weakens the Al-H bonds in AlH 3 , facilitates hydrogen dissociation, and alters the nucleation and growth mechanism of AlH 3 during dehydrogenation. Throughout the entire dehydrogenation process, V 4 C 3 remains chemically stable and enhances the dehydrogenation kinetics of AlH 3 via interfacial catalysis. The aforementioned approach effectively improves the overall dehydrogenation performance of AlH 3 , providing a novel paradigm for enhancing light-metal high-capacity hydrides.
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DOI
高影响因子
危险品化学品经营许可证（带存储）