Article
Chemistry, Physical
Peng Wang, Zhihui Tian, Zexuan Wang, Chaoqun Xia, Tai Yang, Xiulong Ou
Summary: In this study, transition metal sulfides were used as catalysts to enhance the hydrogen storage behaviors of MgH2. The addition of sulfides significantly increased the desorption and absorption kinetics of hydrogen in MgH2, with MgH2-TiS2 showing the best performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Cong Peng, Qingan Zhang
Summary: In this study, a high-efficient catalyst comprising of YCxFy nanosheets-supported Ni nanoparticles was designed to address the sluggish kinetics and poor cyclic stability of MgH2. The as-achieved MgH2-10 wt.% Ni-30/YCxFy composite exhibits superior hydrogen desorption kinetics and high capacity retention. The in situ formed Mg2NiH4 and YH3 catalytic phases accelerate the hydrogen desorption kinetics, while the dispersed MgF2 and carbon species prevent the crystallite growth, particle aggregation, and catalyst redispersion, contributing to an excellent cyclic stability.
Article
Nanoscience & Nanotechnology
Haizhen Liu, Chenglin Lu, Xinchun Wang, Li Xu, Xiantun Huang, Xinhua Wang, Hua Ning, Zhiqiang Lan, Jin Guo
Summary: The combination of V2C and Ti3C2 in MgH2 significantly improves hydrogen storage performance, enhancing hydrogen desorption rate and cycling stability. V2C and Ti3C2 promote the hydrogen-releasing process of MgH2 and may facilitate the transfer of hydrogen atoms or molecules through grain boundaries and interfaces. This study provides new insights into the hydrogen storage behaviors and mechanisms of MgH2 catalyzed by MXenes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Liang Dan, Hui Wang, Xiaobao Yang, Jiangwen Liu, Liuzhang Ouyang, Min Zhu
Summary: This study demonstrates the significant improvement of hydrogen sorption performances of MgH2 by synthesizing Nb-doped TiO2 solid-solution-type catalysts. The catalyzed MgH2 is able to absorb 5% of H2 at room temperature for 20 seconds, release 6% of H2 at 225 degrees C within 12 minutes, and achieve complete dehydrogenation at 150 degrees C under a dynamic vacuum atmosphere. The success of solid solution-type catalysts in MgH2 provides a demonstration and inspiration for the development of high-performance catalysts and solid-state hydrogen storage materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Zhaojie Wu, Jianhua Fang, Na Liu, Jiang Wu, Linglan Kong
Summary: The MgH2+ML-Ti3C2 composite hydrogen storage system was successfully synthesized, reducing the initial desorption temperature to 142°C with a capacity of 6.56%. The kinetics of hydrogen absorption and desorption can be enhanced by ML-Ti3C2, attributed to two synergistic effects: Ti facilitates the dissociation or recombination of hydrogen molecules, and electron transfer generated by multivalent Ti promotes the conversion of hydrogen.
Article
Engineering, Environmental
Zhiqiang Lan, Xiaobin Wen, Liang Zeng, Ziqi Luo, Huiren Liang, Weitao Shi, Feifan Hong, Haizhen Liu, Hua Ning, Wenzheng Zhou, Jin Guo
Summary: The incorporation of (Ni-V2O3)@C nanoparticles was introduced to enhance the hydrogen storage performance of Mg/MgH2 systems. The composite sample exhibited improved hydrogenation and dehydrogenation kinetics, with a lower initial hydrogenation temperature and higher hydrogen absorption and desorption capacities compared to pristine MgH2. The addition of (Ni-V2O3)@C nanoparticles acted as a hydrogen pump, promoting hydrogen diffusion and dissociation within the Mg/MgH2 system.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Haiguang Gao, Yingyan Zhao, Xu Zhang, Baozhou Zhao, Zhen Jia, Yana Liu, Xiaohui Hu, Yunfeng Zhu
Summary: This study introduces solid-solution MAX phase TiVAlC catalyst directly into the MgH2 system to improve its hydrogen storage performance. The excellent catalytic activity of TiVAlC catalyst can be explained by abundant electron transfer at external and internal interfaces. The influence of impurity phase on the overall activity of catalysts has also been studied, providing a unique method for designing composite catalyst to improve hydrogen storage performance of MgH2.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
M. Ismail
Summary: Magnesium hydride (MgH2) is a promising material for solid-state hydrogen storage due to its reversible nature and high storage capacity. However, slow kinetics and high stability have hindered its commercialization. By adding hafnium tetrachloride (HfCl4) as a catalyst, the desorption kinetics and thermodynamics of MgH2 can be improved, with the optimal enhancement observed at 15 wt% HfCl4 doping.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Pawan K. Soni, Ashish Bhatnagar, M. A. Shaz
Summary: In this study, the synergistic effect of Fe nanoparticles and hollow carbon spheres composite on the hydrogen storage properties of MgH2 was investigated. The MgH2-Fe-HCS system exhibited an onset desorption temperature of 225.9 degrees C and a hydrogen storage capacity of 5.60 wt%. The MgH2-Fe-HCS composite absorbed 5.60 wt% hydrogen within 55 s and desorbed 5.50 wt% hydrogen within 12 min under 20 atm H2 pressure at 300 degrees C. The desorption activation energy of MgH2-Fe-HCS was found to be 84.9 kJ/mol. The composite also showed better cyclability up to 24 cycles of hydrogenation and dehydrogenation of MgH2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Xuelian Zhang, Ke Wang, Xin Zhang, Jianjiang Hu, Mingxia Gao, Hongge Pan, Yongfeng Liu
Summary: The synthesis of Nb(2)O(5) hollow spheres (o-Nb2O5) by a hydrothermal and calcination process has shown high catalytic activity in MgH(2) hydrogen storage, lowering the dehydrogenation temperature and increasing the amount of released hydrogen. Furthermore, o-Nb2O5 was found to be reduced in situ by MgH(2) to enhance dehydrogenation kinetics.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Zhichao Yu, Xin Liu, Yang Liu, Yuan Li, Zhuohan Zhang, Kangli Chen, Shumin Han
Summary: The hydrogen absorption/desorption kinetics of MgH2 can be significantly improved by using Ni@C@CeO2 as the catalyst. The composites, with 10 wt% Ni@C@CeO2 doped, can absorb 4.51 wt% hydrogen within 60 min at 75 degrees C and release approximately 4.88 wt% hydrogen within 10 min at 325 degrees C. In addition, the composites show excellent cycling performance with no decrease in hydrogen storage capacity, hydrogen uptake rate, and hydrogen release rate after ten cycles at 350 degrees C. The in-situ formation of Mg2NiH4/Mg2Ni and CeH2.73 phases enhances the hydrogen pump effect and accelerates the conversion of Mg2Ni/Mg2NiH4, which contributes to the improved hydrogen storage performance of MgH2.
Article
Energy & Fuels
Haoyuan Li, Qiang Fu, Hongyun Qin, Xia Chen, Qicheng Zhang, Hui Zhang, Shoudong Wang, Zixu Dong, Ming Wang
Summary: In this study, the controllable and continuous MgH2 hydrolysis was achieved by using an optimized porous filter element, which provides valuable reference for continuous MgH2 hydrolysis.
Article
Chemistry, Physical
Jiaao Wu, Haohua Zhang, Yitong Wang, Yongjin Zou, Bin Li, Cuili Xiang, Lixian Sun, Feng Xu, Ting Yu
Summary: MgH2 is considered as a highly advantageous hydrogen storage material due to its safety, high efficiency, significant hydrogen storage capacity, and low cost. However, its application is limited by subpar thermodynamics and kinetics, which can be enhanced through combination with other materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
N. N. Sulaiman, M. Ismail, A. H. A. Rashid, N. A. Ali, N. A. Sazelee, S. N. Timmiati
Summary: The hydrogen sorption performances of the 4MgH(2) + LiAlH4 system destabilized with 5 wt% Al2TiO5 showed significantly improved dehydrogenation temperature and kinetics. The introduction of Al2TiO5 resulted in earlier hydrogen liberation and enhanced absorption and desorption kinetics, indicating a synergistic effect on hydrogen storage behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Haiyi Wan, Darui Fang, Shiming Zhou, Xiu Yang, Yujuan Dai, Lei Ran, Yu'an Chen, Fusheng Pan
Summary: This study successfully prepared Fe containing MgH2 solid solution by the milling method, and systematically investigated its dehydrogenation properties and mechanism. The results showed that the lattice distortion and charge transfer caused by Fe atoms significantly improved the dehydrogenation kinetics of MgH2, reducing the dehydrogenation activation energy by 44.5%. The initial dehydrogenation temperature of the composite was nearly 200 degrees C lower than that of pure MgH2, and 4.5 wt% of H2 could be released at 230 degrees C for 30 min.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
E. L. V. Eriksson, E. MacA. Gray
Article
Chemistry, Physical
Nazanin Rahimi, Randolph A. Pax, Evan MacA Gray
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Engineering, Electrical & Electronic
Rasoul Garmabdari, Mojtaba Moghimi, Fuwen Yang, Evan Gray, Junwei Lu
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2020)
Article
Chemistry, Physical
Michael Hirscher, Volodymyr A. Yartys, Marcello Baricco, Jose Bellosta von Colbe, Didier Blanchard, Robert C. Bowman, Darren P. Broom, Craig E. Buckley, Fei Chang, Ping Chen, Young Whan Cho, Jean-Claude Crivello, Fermin Cuevas, William I. F. David, Petra E. de Jongh, Roman Denys, Martin Dornheim, Michael Felderhoff, Yaroslav Filinchuk, George E. Froudakis, David M. Grant, Evan MacA Gray, Bjorn C. Hauback, Teng He, Terry D. Humphries, Torben R. Jensen, Sangryun Kim, Yoshitsugu Kojima, Michel Latroche, Hai-Wen Li, Mykhaylo Lototskyy, Joshua W. Makepeace, Kasper T. Moller, Lubna Naheed, Peter Ngene, Dag Noreus, Magnus Moe Nygard, Shin-ichi Orimo, Mark Paskevicius, Luca Pasquini, Dorthe B. Ravnsbaek, M. Veronica Sofianos, Terrence J. Udovic, Tejs Vegge, Gavin S. Walker, Colin J. Webb, Claudia Weidenthaler, Claudia Zlotea
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Review
Chemistry, Inorganic & Nuclear
S. S. Setayandeh, C. J. Webb, E. Mac A. Gray
PROGRESS IN SOLID STATE CHEMISTRY
(2020)
Article
Chemistry, Physical
L. Naheed, K. E. Lamb, E. MacA. Gray, C. J. Webb
Summary: Calculating gas sorption isotherms requires accurate knowledge of the void volume in the sample cell, which changes with sample variations. In experiments on porous materials, the adsorbate volume is typically considered the pore volume, and high pressure experiments are needed to extract information on adsorbate volume and density.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2021)
Article
Chemistry, Physical
Samaneh Sadat Setayandeh, Tim Gould, Aminollah Vaez, Evan Gray
Summary: Density functional theory is increasingly used for predicting and understanding hydrogen storage materials, with good agreement on electron band structures but significant disparities in phonon band structures. Different calculation approaches may cause these disparities. The study found that electron bands have excellent agreement, while phonon properties are sensitive to calculated lattice constants.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Lubna Naheed, Miriam Koppel, Maarja Paalo, Khadija Alsabawi, Krystina E. Lamb, Evan MacA. Gray, Alar Janes, Colin J. Webb
Summary: The properties of the adsorbed hydrogen phase in three carbide derived carbons have been studied, and it was found that all three CDCs had the same maximum adsorbate density, with the adsorption proportional to the total pore volume.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
E. Math. Gray
Summary: A thermodynamic model is proposed to aid in selecting compatible pairs of hydrogen storage alloys for multi-stage metal-hydride compressors. The model is based on ideal compressor concept with constraints on alloy selection due to thermodynamic characteristics, including pressure hysteresis and plateau slope. Experimentally determined effects such as curved van ?t Hoff line are considered in a case study of a two-stage compressor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Samaneh Sadat Setayandeh, Tim Gould, Aminollah Vaez, Keith McLennan, Nicolas Armanet, Evan Gray
Summary: This study examined the calculation methods and results of the partial atomic volume of hydrogen in interstitial metal hydrides, finding that v(H) is rather robust against different calculation methods, allowing for a meaningful comparison and validation of theoretical and experimental results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Md Alamgir Hossain, Ripon K. Chakrabortty, Sondoss Elsawah, Evan Mac A. Gray, Michael J. Ryan
Summary: This study introduces a hybrid deep learning model to accurately forecast wind power generation at the Boco Rock Wind Farm in Australia, achieving significant improvements in accuracy compared to other advanced models through parameter tuning and optimization algorithm.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Chemistry, Physical
E. MacA Gray, C. J. Webb
Summary: The pressure-composition isotherm is the most important measurement for a new hydrogen storage material, which captures the storage conditions and the amount of hydrogen stored. The Sieverts technique is the most popular experimental approach for constructing such isotherms, where the amount of hydrogen absorbed or desorbed by the sample can be inferred from measurements of the hydrogen pressure. This study discusses the factors contributing to good performance and presents a Figure of Merit for evaluating the apparatus performance in combination with the sample.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Mostafa Rezaei, Alexandr Akimov, Evan MacA Gray
Summary: This study examines the sensitivity of the levelised cost of hydrogen (LCOH) produced from solar photovoltaic (PV) electricity to four critical factors. The results highlight the importance of carefully selecting the location to achieve a high PV capacity factor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Automation & Control Systems
Md Alamgir Hossain, Evan Gray, Junwei Lu, Md Rabiul Islam, Md Shafiul Alam, Ripon Chakrabortty, Hemanshu Roy Pota
Summary: This article proposes a novel framework, CEMOLS, to improve the prediction accuracy of very short-term wind power generation. The framework combines CEEMDAN, MBO, and LSTM models and demonstrates an improvement in forecasting accuracy compared to the benchmark model.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Energy & Fuels
E. MacA Gray, C. J. Webb
JOURNAL OF PHYSICS-ENERGY
(2020)