Article
Chemistry, Physical
Vasyl Berezovets, Andriy Kytsya, Ihor Zavaliy, Volodymyr A. Yartys
Summary: In this study, the hydrolysis of magnesium hydride in MgCl2 aqueous solutions was systematically studied, showing linear dependencies of hydrolysis rate, pH, and yield on the logarithm of MgCl2 concentration. The precipitates formed do not contain chlorine ions and consist solely of Mg(OH)2, with crystallite size increasing with MgCl2 content. A pseudo-homogeneous model best described the hydrolysis kinetics, and the presence of Mg(OH)2 was found to partially suspend the reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Lishuai Xie, Yeqing Ding, Jiahao Ren, Teng Xie, Yaqiu Qin, Xiaomin Wang, Fei Chen
Summary: In this study, Nb2O5 and/or CeO2-doped MgH2 was prepared via high energy ball milling to enhance its hydrolysis performance and oxidation resistance. The Nb2O5 and CeO2 particles were uniformly distributed on the surface of MgH2 matrix after ball milling, with Nb2O5 showing better facilitating effects on the hydrolysis performance.
MATERIALS TRANSACTIONS
(2021)
Article
Chemistry, Physical
Lishuai Xie, Jiahao Ren, Yaqiu Qin, Xiaomin Wang, Fei Chen, Zhixin Ba
Summary: In this study, Mg-Nd binary and Mg-Nd-Ni ternary alloys with different Nd/Ni contents were successfully synthesized via near equilibrium solidification. It was found that the addition of Ni significantly enhanced the hydrolysis properties of Mg alloys, and ternary alloys with abundant eutectic microstructures showed superior performance. The results suggest that microstructure optimization is feasible to modify the hydrogen generation performance of Mg-based alloys.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Hongyun Qin, Haoyuan Li, Qiang Fu, Rujun Yu, Yang Zhao, Zhong Kang, Xia Chen, Ming Wang
Summary: This study investigates the hydrolysis performance of magnesium hydride (MgH2) in a self-made hydrolysis reactor. The results demonstrate that the hydrolysis reactor with a plate tower structure enables controllable continuous MgH2 hydrolysis, improving material distribution and liquid-solid mass transfer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Crystallography
Nuraini Ruslan, Muhammad Syarifuddin Yahya, Md Nurul Islam Siddique, Ashish Prabhakar Yengantiwar, Mohammad Ismail, Md Rabiul Awal, Mohd Zaki Mohd Yusoff, Muhammad Firdaus Asyraf Abdul Halim Yap, Nurul Shafikah Mustafa
Summary: Metal hydrides such as MgH2 and NaBH4 have high potential for solid-state hydrogen storage. However, a dehydrogenation process is required prior to hydrogen utilization. The hydrolysis method is a possible way to extract or generate hydrogen, but issues like passivation layer, high cost and sluggish self-hydrolysis can be overcome with the help of catalysts. Studies have shown that adding catalysts like chloride, oxide, fluoride, platinum, ruthenium, cobalt, and nickel can significantly enhance the amount of hydrogen released during the hydrolysis of MgH2 and NaBH4.
Article
Energy & Fuels
Tingting Xu, Ning Wang, Yujun Chai
Summary: The rapid generation of hydrogen can be achieved by immersing Mg in a solution of Mn(Ac)(2), which forms an Mg/Mn galvanic cell that destroys the oxide film and induces a continuous reaction. The involvement of Mn in the generation of hydrogen is illustrated by its oxidation back to Mn2+.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Geo Jong Kim, Hyun Tae Hwang
Summary: Hydrogen from sodium borohydride can be generated by thermolysis or hydrolysis, but both methods have drawbacks such as high temperatures required or safety concerns. A new process, thermal hydrolysis of SBH, is proposed to address these issues and achieve efficient hydrogen production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
M. Legree, V Charbonnier, S. Al Bacha, K. Asano, K. Sakaki, I Aubert, F. Mauvy, J-L Bobet
Summary: In this study, the hydrogen generation performance of LPSO compounds and LPSO + Mg alloys in simulated seawater solution was investigated. Results showed that LPSO compounds, especially the single phase LPSO Mg(87.6N)i(5.5)Y(6.9), exhibited improved H2 generation features compared to pure Mg. Alloys containing both Mg and LPSO benefited from galvanic coupling between the two phases, leading to higher reactivity and lower activation energies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Zhimin Zhang, Xuchen Lu, Yan Yan
Summary: The study focused on preparing high-purity anhydrous magnesium chloride and analyzing its critical stages for purity. A mechanism for purity guarantee was proposed, and a new process for continuous production of magnesium metal was discussed. Incomplete chlorination reaction and hydrolysis were identified as key stages affecting purity, which could be addressed by controlling sample dimensions.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Review
Chemistry, Physical
Zipeng Liu, Jinling Zhong, Haiyan Leng, Guanglin Xia, Xuebin Yu
Summary: The hydrolysis of Mg-based alloys and their hydrides can produce hydrogen with high theoretical capacity, but the formation of passive magnesium hydroxides can interrupt the reaction, leading to low yield and sluggish reaction rates. Enhancement methods are needed to improve both yield and kinetics in the hydrolysis reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Mykhaylo V. Lototskyy, Moegamat Wafeeq Davids, Tshepo Kgokane Sekgobela, Artem A. Arbuzov, Sergey A. Mozhzhukhin, Yongyang Zhu, Renheng Tang, Boris P. Tarasov
Summary: Hydrolysis of light metals and hydrides can be used for hydrogen generation in fuel cell vehicles or for refilling their fuel tanks without a compressor. To solve the problem of controlling hydrogen release and avoiding thermal runaway, an apparatus for controlled generation of pressurized hydrogen using hydrolysis of Mg or MgH2 in organic acid solutions has been developed. Experimental results show that the hydrogen yield is close to 100% with a fast hydrolysis rate when the molar ratio of acid to MgH2 exceeds certain values for different acids, indicating the buffer nature of the resulting solutions.
Article
Chemistry, Multidisciplinary
Yihang Li, Jiahua Chen, Jaslyn Jing Wen Ng, Shunsuke Chiba
Summary: A protocol was developed to generate allylmagnesium reagents from 2-aryl-1,3-dienes using in situ generated magnesium hydride (MgH2) through solvothermal treatment of sodium hydride (NaH) and magnesium iodide (MgI2) in tetrahydrofuran (THF). Downstream functionalization of the resulting allylmagnesium reagents with carbonyl compounds or alkyl (pseudo)halides led to branched products with an allylic quaternary carbon center, while reaction with chlorosilanes resulted in regio and stereoselective formation of linear allylsilanes. Further derivatizations of the homoallylic alcohols and allylsilanes were also demonstrated.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Guillaume Donadey, Simon Caillaud, Pierre Coeuret, Maria Moussa, Laurent Cuzacq, Jean-Louis Bobet
Summary: Hydrogen production through hydrolysis using Mg-based waste in simulated seawater was investigated. Different mechanical treatments, such as ball milling, cold rolling, cryo rolling, and cryo ball milling, were employed to study their effects on the hydrolysis yield. The results show that pretreatment with cryo rolling before ball milling achieved the highest yield of 90.5% in salted water within 10 minutes.
Article
Chemistry, Physical
Tomoharu Uchiyama, Daisuke Ando, Yuji Sutou
Summary: This study investigates the hydrogen generating characteristics of Mg-Ca alloys with Mg/Mg2Ca nanolamellar structures in the hydrolysis reaction with artificial seawater. The results show that the eutectic structure with several nanogalvanic cells of Mg/Mg2Ca in the alloys accelerates the hydrolysis reaction and leads to complete reaction with artificial seawater for hydrogen generation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
Metallurgy & Metallurgical Engineering
Shaoyang Shen, Liuzhang Ouyang, Jiangwen Liu, Hui Wang, Xu-Sheng Yang, Min Zhu
Summary: A one-step high-energy ball milling process is used to in situ form ultrafine Ni nanoparticles and combine them with expanded graphite to synthesize a MgH2Ni-EG nanocomposite. The nanocomposite exhibits excellent hydrogen storage performance at both high and room temperatures.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Jiaming Zhu, Xinping Mao
Summary: The influences of cooling rates, prior austenite grain size, and impurity inclusion density on the microstructure evolution of austenite-acicular ferrite transformation in low alloy steels were quantitatively evaluated by multi-phase-field simulation. The numerical results demonstrate that reducing prior austenite grain size, increasing cooling rate, and increasing inclusion nucleation density can effectively refine acicular ferrite grain size. The findings contribute to better regulating and designing acicular ferrite in steels.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Wanting Sun, Jiasi Luo, Yim Ying Chan, J. H. Luan, Xu-Sheng Yang
Summary: In this study, a laser surface remelting technique was used to fabricate a heterogeneous gradient nanostructured layer on an austenitic Hadfield manganese steel. The layer exhibited a gradient refinement process and had a core-shell structure with ultra-strong mechanical properties due to the extra work hardening ability induced by the strength-ductility synergy in the gradient nanostructure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jiasi Luo, Wanting Sun, Dingshan Liang, Wenqing Yang, K. C. Chan, Fuzeng Ren, Xu-Sheng Yang
Summary: Heterogeneous crystalline-amorphous nanostructures exhibit superior strength-ductility synergy through the cooperative effects of nanograins and amorphous grain boundaries in co-deformation. In this study, a facile laser surface remelting technique was successfully developed to fabricate a 100 μm-thick gradient nanostructured layer with phase decomposition on a TiZrHfTaNb0.2 high-entropy alloy. A 5 μm-thick crystalline-amorphous nanostructured surface layer with an average grain size of 7 nm was obtained. This nanostructured layer demonstrated an ultrahigh yield strength of 6.0 GPa and a compression strain of 25% during localized micro-pillar compression tests. Co-deformation cooperative mechanisms observed included well-retained dislocation activities in nanograins and crystallization in amorphous grain boundaries, resulting in grain coarsening through grain boundary-mediated plasticity. This study provides insights into the development of high-performance high-entropy alloys with novel crystalline-amorphous nanostructures and their plastic deformation mechanisms.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Rongjian Shi, Yanlin Wang, Supeng Lu, Saiyu Liu, Yanqi Tu, Shani Yang, Kewei Gao, Xu-Sheng Yang, Xiaolu Pang
Summary: The high-strength spring steel demonstrates superior hydrogen embrittlement resistance and satisfactory work hardening capacity after hydrogen pre-charging with dispersed multiple precipitates via multi-microalloying of 1.04 wt% Cr and 0.14 wt% V. The multiple precipitates include isolated (Mn, Cr, V)-enriched cementite, isolated V-enriched VC, and co-precipitation of cementite and VC, which act as effective hydrogen traps and reduce HE susceptibility by 23%, making this strategy beneficial for designing high-strength and HE-resistant automotive steels.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
De-Xin Zhu, Kun-Ming Pan, Yuan Wu, Xiao-Ye Zhou, Xiang-Yue Li, Yong-Peng Ren, Sai-Ru Shi, Hua Yu, Shi-Zhong Wei, Hong-Hui Wu, Xu-Sheng Yang
Summary: In this study, the dominant factors influencing the bulk modulus of intermetallic compounds were identified as B-cal, dB(avg), and TIE. Surrogate machine learning models using these features achieved a 95% accuracy in predicting bulk modulus. Symbolic regression provided an expression for the relationship between bulk modulus and the screened features. These findings offer a new approach for optimizing and predicting the bulk moduli of intermetallic compounds.
Article
Metallurgy & Metallurgical Engineering
Rongjian Shi, Yanqi Tu, Liang Yang, Saiyu Liu, Shani Yang, Kewei Gao, Xu-Sheng Yang, Xiaolu Pang
Summary: This study explored the influence of pre-strain and microstructures on the hydrogen trapping behaviors in 1-GPa high-strength martensitic steel. The results showed that the trapped reversible and trapped irreversible hydrogen contents significantly increased after a pre-strain of 5%. The microstructural evolution revealed that the presence of concomitant dislocation cell-twin duplex microstructure and tangled dislocations contributed to the enhanced hydrogen trapping.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yongyang Zhu, Shaoyang Shen, Xu-Sheng Yang, Liming Zeng, Gary Tsui, Zheng-Long Xu, Qing Zhou, Renheng Tang, K. C. Chan
Summary: This study proposes a cost-effective method to regenerate LiBH4 by ball milling hydrous lithium metaborate with low-cost Mg-based alloys. The introduction of light rare-earth metals into Mg improves the regeneration kinetics of LiBH4 by facilitating the breakage of B-O and conversion of H+ into H-. A yield of 40% can be achieved for LiBO2 center dot 2H(2)O-CeMg12 system with a relatively short ball milling duration of 10 hours. The optimized regeneration of LiBH4 is believed to be efficient and economical, utilizing an intrinsic hydrogen source in LiBO2 center dot 2H(2)O and cheap reducing agents. This finding is expected to promote the widespread use of LiBH4 for hydrogen storage.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Xinping Mao
Summary: The austenite to ferrite phase transformation is a crucial structural change in steel production, with the ferrite morphology and grain size significantly impacting the mechanical properties of steel materials. This study investigates the effects of cooling rate, prior austenite grain size (PAGS), and Mn content on the microstructure evolution of the austenite-to-polygonal ferrite phase transformation using a multi-phase-field model. The findings reveal that higher cooling rates enhance the driving force for the phase transformation and delay the process. Decreasing PAGS increases the proportion of austenite grain boundaries, providing more nucleation sites for polygonal ferrite and resulting in refined grain size. Furthermore, increased Mn content leads to significant grain refinement by reducing the transformation temperature. This work provides valuable insights for adjusting and designing desired microstructures of polygonal ferrite to enhance the mechanical performance of steel.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Yuqing Cai, Wenjing Liu, Fangfei Chang, Su Jin, Xusheng Yang, Chuanxiang Zhang, Ling Bai, Titus Masese, Ziquan Li, Zhen-Dong Huang
Summary: In this study, Ni, Fe, Mg, and Ti elements were introduced into Mn-based layered oxide to design a high-entropy compound HE-KMO, which demonstrated exceptional rate capability and cyclic stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ling Wang, Dongxuan Li, Yawen Huang, Ruiqi Mao, Boqing Zhang, Fengxiong Luo, Peiyang Gu, Ping Song, Xiang Ge, Jian Lu, Xusheng Yang, Yujiang Fan, Xingdong Zhang, Kefeng Wang
Summary: In this study, enhanced in situ mineralization through the combination of enzymatic and anion-boosted mineralization is applied, resulting in improved mineralization efficiency, mineral content, and mechanical properties. The mechanism of mineralization enhancement is investigated through computational calculations and in vitro mineralization experiments. The strategy is shown to have potential applications in cranial bone repair.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Haoling Huo, Lin Cao, Jie Li, Huaijun Lin, Qiwei Wang, Xusheng Yang, Chuanjun Zang, Jingtao Zhang, Peng Zhang, Wei Li
Summary: In this study, modified coatings with PEEK and nanoparticles were utilized to enhance the strength and wear resistance. The addition of tantalum carbide nanoparticles showed the greatest improvement in mechanical behavior and wear resistance. The modified coatings have the potential to reduce stress on the titanium implant substrate and extend the lifespan of total knee replacement implants.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Chaolei Zhang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Xinping Mao
Summary: In this study, the austenitic-pearlite transformation and its effects on microstructure evolution were investigated using a CALPHAD-based model. The results showed that the isothermal transformation temperature, cooling rate, and Mn content significantly influenced the pearlite transformation process, and the multi-component diffusion played a critical role in pearlite growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Yanyu Chen, Jie Li, Yingfei Yang, Junjie Yang, Huaijun Lin, Qiwei Wang, Xusheng Yang, Yuying Meng, Wei Li, Zhidan Lin, Peng Zhang
Summary: A novel porous polymer was prepared using the Pickering high internal phase emulsion (HIPE) template method for efficient oil-water separation from sewage. The addition of OTS-modified carbon nanotubes and surfactants improved the stability, mechanical properties, and separation efficiency of the polyHIPE. The 1%OTS-CNT polyHIPE exhibited high oil absorption capacity and maintained absorption efficiency even after multiple reapplications. Furthermore, the polymer showed superior antibacterial properties against E. coli and S. aureus.
Article
Engineering, Environmental
Yongyang Zhu, Xubo Li, Xu-Sheng Yang, Pengyun Chen, Gary Chi-Pong Tsui, Zheng-Long Xu, Renheng Tang, Fangming Xiao, Kangcheung Chan
Summary: Researchers have developed a low-cost BCC solid solution alloy with excellent activation performance and high effective hydrogen desorption capacity by using a new compositionally complex doping strategy. The synergistic effect of Nb, Fe, Co, Ni, and Mn elements has been confirmed to improve hydrogen storage performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
