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, Ceramics
D. S. Korablov, O. V. Bezdorozhev, S. Gierlotka, V. A. Yartys, Yu. M. Solonin
Summary: The study found that the MgH2 composite with EDTA displayed the lowest reactivity, while the MgH2 composite with AlCl3 showed the best performance in hydrolysis, with higher hydrogen yield and conversion rate.
POWDER METALLURGY AND METAL CERAMICS
(2021)
Article
Chemistry, Physical
Agata Baran, Michal Kniola, Tomasz Rogala, Marek Polanski
Summary: A new route of materials synthesis, high-temperature, high-pressure reactive planetary ball milling (HTPRM), is introduced in this study. It allows for the controlled mechanosynthesis of materials at temperatures up to 450 degrees C and pressures up to 100 bar of hydrogen. The successful synthesis of magnesium hydride is presented as an example of the application, demonstrating the great potential of this technique for the mechanochemical synthesis of materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
V. V. Berezovets, A. R. Kytsya, T. M. Zasadnyy, I. Yu. Zavaliy, V. A. Yartys
Summary: A composite material based on magnesium hydride and citric acid was synthesized by mechanical milling in an argon atmosphere and used for hydrogen generation in the laboratory. The resulting composite material showed faster hydrogen release in hydrolysis reaction compared to pure MgH2. The effect of the composition on the hydrolysis reaction of MgH2 was studied to determine the optimal composition for hydrogen generation devices. The positive influence of citric acid on the hydrolysis of magnesium hydride was analyzed.
Article
Chemistry, Physical
Maria Rodriguez, Guillermina Urretavizcaya, Jean-Louis Bobet, Facundo J. Castro
Summary: This paper discusses the reprocessing of Mg scraps from sacrificial anodes manufacturing by mechanical milling for the production of H2 by hydrolysis. The effects of iron and graphite as additives to improve the hydrolysis reaction are presented. It has been found that pre-milling the scraps with 1.5 wt% of Fe for 10 hours followed by an extra milling with 5 wt% of graphite for 1 hour produces the best results. The addition of Fe accelerates the reaction rate by inducing microgalvanic coupling with Mg, while graphite acts as a process control agent during milling and contributes to size reduction of the material, resulting in faster H2 production.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Environmental Sciences
Kanhaiya Chawla, Deepak Kumar Yadav, Abhinav Bajpai, Sushant Kumar, Chhagan Lal
Summary: This study investigates the improvement of hydrogen storage properties of MgH2 by using activated carbon as a catalyst in MgH2-AC nanocomposites. The results show that the presence of activated carbon helps reduce oxygen in MgO phase, leading to significantly enhanced absorption capacity and kinetics in the MgH2-AC nanocomposites. The nanocomposites also exhibit high hydrogenation properties with the presence of beta- and gamma-phases of MgH2, as supported by XRD data.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Yingji Wu, Shengbo Ge, Changlei Xia, Changtong Mei, Ki-Hyun Kim, Liping Cai, Lee M. Smith, Jechan Lee, Sheldon Q. Shi
Summary: Intermittent ball milling was effective in enhancing enzymatic hydrolysis of dilute acid-pretreated lignocellulosic biomass, leading to higher glucose yield compared to typical hydrolysis. This technology shows promise for more efficient and environmentally friendly approaches to isolating glucose from lignocellulosic biomass.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Environmental Sciences
Deepak Kumar Yadav, Kanhaiya Chawla, I. P. Jain, Chhagan Lal
Summary: The reversible hydrogen storage in MgH2 is a possible way for the positive reception of hydrogen economy. The introduction of MM as additives in MgH2 remarkably changes the activation energy of nanomaterials, leading to improved hydrogen absorption properties. The MgH2 - 30 wt% MM nanomaterials exhibit the highest hydrogen absorption capacity compared to pure MgH2.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Maria Rodriguez, Franco Niro, Guillermina Urretavizcaya, Jean-Louis Bobet, Facundo J. Castro
Summary: Magnesium-based wastes were reprocessed by mechanical milling and used to produce hydrogen through hydrolysis. The material evolved during reprocessing and hydrogen was generated in a MgCl2 solution at 24 degrees C. The particle size, crystallite size, microstrain, and phase abundance changed during mechanical processing. Hydrogen yields of 70-90% were obtained after 30 min of reaction, depending on milling time. The reaction kinetics improved with milling time, and the hydrolysis curves could be fitted with a model limited by a three-dimensional geometric contraction process. Mg17Al12 and Fe played a role in promoting hydrogen production during the reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Agricultural Engineering
Kaili Ding, Hao Lin, Luoyang Liu, Xiwen Jia, Hui Zhang, Yufeng Tan, Xueyan Liang, Yinghui He, Dong Liu, Lujia Han, Weihua Xiao
Summary: In this study, corn stover was analyzed and divided into different parts. It was found that the husk obtained the highest monosaccharide concentration after ball milling pretreatment, due to its improved structural properties. Ball milling pretreatment enhanced the crystallinity, xylan content, and water retention value, leading to increased sugar yield.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Physical
Cong Peng, Yongtao Li, Qingan Zhang
Summary: This paper proposes a new approach to improve the sorption kinetics of magnesium hydride by catalyzing it with highly dispersed nickel nanoparticles. The experiment demonstrates that the in-situ formation of highly dispersed Ni nanoparticles in the MgH2 matrix significantly enhances the hydrogen desorption kinetics and retention rate of MgH2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Hai-chang Zhong, Chen-long Lin, Zi-yu Du, Chun-yan Cao, Chu Liang, Qing-rong Zheng, Le-yang Dai
Summary: LaF3 was doped to the Mg(Al) solid solution alloy to enhance hydrogen absorption and desorption. The results showed that the hydrogen storage kinetic properties were significantly improved in the Mg0.93Al0.07-5wt.%LaF3 nanocomposite, attributed to the reduction of activation energies.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(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
Chemistry, Physical
Kaaviah Manoharan, Rajashabala Sundaram, Kannan Raman
Summary: Our environment is deteriorating due to modernization and industrialization, leading to serious issues. Hydrogen energy is seen as a green and sustainable alternative. This study focuses on the effective storage of hydrogen using a nanocomposite of metal hydride (MgH2), natural clay nanotube (A-HNT), and conductive polymer (PANI). The prepared nanocomposite shows improved hydrogen storage capacity and electrochemical activity, making it a potential medium for renewable energy storage.
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)
Article
Green & Sustainable Science & Technology
S. Al Bacha, A. Thienpont, M. Zakhour, M. Nakhl, J. -L. Bobet
Summary: The study involved using ball-milled magnesium powder with the addition of graphite and nickel for hydrogen production through hydrolysis, resulting in rapid reaction speed and high purity. Lowering the pH of the hydrolysis solution reduces the activation energy of the reaction. Hydrolysis of magnesium-based materials is considered a clean hydrogen production technique under standard pressure and ambient temperature conditions.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Multidisciplinary Sciences
L. Fan, L. Constantin, Z. P. Wu, K. A. McElveen, X. G. Chen, T. He, F. Wang, C. Debiemme-Chouvy, B. Cui, R. Y. Lai, X. Li, J. F. Silvain, Y. F. Lu
Summary: The study demonstrates an effective method for maintaining lattice integrity during the growth of highly conductive boron-doped diamonds through laser vibrational excitation of a growth-critical radical. The boron-doped diamonds show improved crystallinity, high conductivity, and enhanced glucose sensing efficiency. Laser excitation in the doping process could potentially remove bottlenecks in the semiconductor industry.
Article
Multidisciplinary Sciences
Loic Constantin, Lisha Fan, Mathilde Pouey, Jerome Roger, Bai Cui, Jean-Francois Silvain, Yong Feng Lu
Summary: The study reports a spontaneous reaction for forming multilayer refractory carbide coatings on carbon fiber, showcasing a high-quality coating that acts as an oxidation barrier to protect the fibers from degradation. The successful synthesis of these coatings in a fast, efficient, easy, and clean manner may offer a solution for industrial applications requiring cheap and reliable protection barriers for extreme environments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Engineering, Manufacturing
Loic Constantin, Nada Kraiem, Zhipeng Wu, Bai Cui, Jean-Luc Battaglia, Christian Garnier, Jean-Francois Silvain, Yong Feng Lu
Summary: This research demonstrates that adding steps to LPBF can improve the quality of MMC structures, leading to more efficient manufacturing and enhanced performance.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Anne Joulain, Valerie Audurier, Pascal Gadaud, Joel Bonneville, Clio Azina, Yongfeng Lu, Jean-Francois Silvain
Summary: The addition of titanium to copper-carbon fiber composites enhances the interfacial bonding strength, preventing fiber pull-out during deformation. However, at a certain fiber volume fraction, crack percolation may occur, leading to sample failure in composites containing copper-titanium. Conversely, in copper/carbon fiber composites, fiber pull-out allows for deformation to occur.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Alexandre Brillon, Justo Garcia, Fanny Riallant, Christian Garnier, Anne Joulain, Yongfeng Lu, Jean-Francois Silvain
Summary: Aluminum matrix composites with boron carbide reinforcements were fabricated using solid state powder metallurgy and hot-pressing process. The incorporation of B4C particles up to 12% increased the hardness and strain hardening threshold of the composite material, but decreased ductility. The thermal conductivity and coefficient of thermal expansion also decreased with an increase in B4C volume fraction.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Aofei Mao, Peixun Fan, Loic Constantin, Nan Li, Xi Huang, Bai Cui, Jean-Francois Silvain, Xinwei Wang, Yong Feng Lu
Summary: This study presents an approach to transform 2D patterns into 3D geometries using distributed stress inside a polymer. By introducing controlled stress fields, various shape transformations can be achieved during 2D printing. This method offers a unique way to fabricate complex 3D nanostructures.
APPLIED MATERIALS TODAY
(2022)
Article
Materials Science, Composites
Alexandre Brillon, Jean-Marc Heintz, Loic Constantin, Francoise Pillier, Yongfeng Lu, Jean-Francois Silvain, Catherine Debiemme-Chouvy
Summary: In this study, a simple synthesis method was used to form a N-doped graphenelike film with a thickness of 10 nm surrounding the Cu flakes, and hard Cu matrix composites with anisotropic thermal conductivity were fabricated.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Composites
Jean-Francois Silvain, Benjamin Thomas, Loic Constantin, Mael Pontoreau, Yongfeng Lu, Jean-Luc Grosseau-Poussard, Guillaume Lacombe
Summary: The green MLM technique allows for the homogeneous mixing of silver and graphene, leading to improved thermal conductivity and mechanical properties of metal matrix composites (MMCs).
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Chemistry, Physical
Nan Li, Xi Huang, Haoyu Dong, Bin Duan, Qiuchi Zhu, Aofei Mao, Peizi Li, Bai Cui, Jean-Francois Silvain, Yongfeng Lu
Summary: In this study, nanostructures were fabricated on silicon substrates using ultraviolet femtosecond lasers, and these nanostructures were used as SERS-active substrates. It was found that under certain laser parameters, nanoripple structures can achieve high SERS enhancement factors. Furthermore, nanoripple structures and SERS effects were explored on other materials. The effectiveness of the SERS substrates was demonstrated through applications with Sudan I, small extracellular vesicles, and glucose.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Composites
Antoine Bident, Florence Delange, Christine Labrugere, Catherine Debiemme-Chouvy, Yongfeng Lu, Jean-Francois Silvain
Summary: This study presents a novel approach to fabricating a copper/graphene composite using a powder metallurgy-based method. By controlling the interface and ensuring the dispersion of the reinforcement, the hardness of the material was successfully improved. The reduction in electrical resistance varied for different types of copper materials, with potential for further enhancing the electrical properties.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Engineering, Manufacturing
Nada Kraiema, Loic Constantin, Aofei Mao, Fei Wang, Bai Cui, Jean-Francois Silvain, Yong Feng Lu
Summary: Adding a small amount of aluminum powder can significantly improve the processability and heat dissipation of copper, resulting in higher density and smoother parts in 3D printing.
ADDITIVE MANUFACTURING LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jean-Francois Silvain, Helies Boumali, Julie Bourret, Pierre-Marie Geffroy, Sebastien Fourcade, Thomas Batigne, Karim Sinno, Yongfeng Lu, Loic Constantin
Summary: This study investigates the formulation of copper paste for micro-extruding porous copper heat sinks and examines the influence of debinding and sintering conditions on heat dissipation behavior.
MRS COMMUNICATIONS
(2022)
Review
Biotechnology & Applied Microbiology
Mythili Prakasam, Jean-Francois Silvain, Alain Largeteau
Summary: In recent years, biomaterials and their clinical applications have gained widespread attention, with progress in manufacturing processes being a key factor in their technological advancement. Significant advancements have been made in the field of biomaterials, including ceramics, glasses, polymers, composites, glass-ceramics, and metal alloys, with porous ceramics being widely used. However, the lack of mechanical strength in bioceramics and metallic porous implants remains a common obstacle in biomedical applications, with high-pressure processing serving as a potential solution.
BIOENGINEERING-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Jean-Francois Silvain, Loic Constantin, Jean-Marc Heintz, Sylvie Bordere, Lionel Teule-Gay, Yong Feng Lu, Jean-Luc Diot, Renaud de Langlade, Emilien Feuillet
Summary: The study demonstrates an effective route of producing dense, robust, and reliable high-temperature Cu-Sn soldering by modifying the interfacial exchange during a transient liquid phase bonding process. By adding a Cu3Sn-coated layer between Cu and Sn before the bonding process, fast dissolution of Cu in liquid Sn is achieved, altering undesired Cu6Sn5 scallop grain impingement and promoting their uniform growth within the liquid. The developed TLP joint possesses superior shear stress resistance and thermal cycle endurance compared to classical solder joints.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
