Article
Chemistry, Physical
M. A. N. Ahmad, N. A. Sazelee, N. A. Ali, M. Ismail
Summary: In this study, K2NiF6 was used as an additive to improve the dehydrogenation properties of LiAlH4. The addition of K2NiF6 significantly reduced the decomposition temperature and enhanced the dehydrogenation kinetics of LiAlH4. The morphology study showed that the LiAlH4 particles became smaller and less agglomerated when K2NiF6 was added. The in situ formation of new phases during the dehydrogenation process, as well as a reduction in particle size, were believed to contribute to the improved dehydrogenation characteristics of LiAlH4.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
M. Ismail, N. A. Ali, N. A. Sazelee, S. Suwarno
Summary: In this study, aluminum titanate was used as an additive to improve the dehydrogenation properties of lithium alanate. The results showed that the addition of 5 wt.% aluminum titanate significantly lowered the decomposition temperature and enhanced the desorption kinetics of lithium alanate. The alkali titanate-doped lithium alanate was able to release a higher amount of hydrogen at lower temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Chulaluck Pratthana, Kondo-Francois Aguey-Zinsou
Summary: This study developed a method to improve the hydrogen properties of lithium aluminum hydride by encapsulating it in a titanium shell. The core-shell nanostructures obtained showed a significant improvement in dehydrogenation temperatures and desorption kinetics. However, there was some loss of hydrogen reversibility due to the loss of the core-shell structure during hydrogen cycling.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Juan Rogelio Tena-Garcia, Alejandro Casillas-Ramirez, Ricardo Guerrero-Ortiz, David Ricardo Poire de la Cruz, Karina Suarez-Alcantara
Summary: The dehydrogenation temperature of LiAlH4 can be significantly reduced by producing mixtures with ZrCl4 through ball milling at low temperatures. This method allows for efficient hydrogen release by achieving small aggregate size and preventing substantial decomposition. However, the LiAlH4/ZrCl4 mixtures are unstable and difficult to handle. The dehydrogenation pathway is changed in the mixtures, resulting in the formation of Al, LiCl, Zr, and H2 as the main products.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Nur Syazwani Che Mazlan, Muhammad Firdaus Asyraf Abdul Halim Yap, Mohammad Ismail, Muhammad Syarifuddin Yahya, Nurul Amirah Ali, Noratiqah Sazelee, Yew Been Seok
Summary: It is reported that the addition of activated carbon (AC) improves the hydrogen storage ability of ball-milled lithium alanate (LiAlH4). LiAlH4-10 wt.% AC composite exhibits lower onset decomposition temperature, enhanced desorption kinetics, and higher hydrogen release compared to as-received and as-milled LiAlH4. The presence of Li3AlH6 and carbon bonding in the LiAlH4-10 wt.% AC composite is verified by XRD and FTIR measurements.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zhijie Cao, Michael Felderhoff
Summary: Ytterbium tetrahydroaluminate Yb(AlH4)3 was successfully synthesized via a mechanochemical procedure under hydrogen atmosphere, with its thermal decomposition proceeding through four stages. The first dehydrogenation step exhibited a relatively low apparent activation energy, while rehydrogenation tests showed unsuccessful rehydrogenations of the first decomposition step.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Xusheng Liu, Shaopeng Wu, Xiaolan Cai, Lei Zhou
Summary: This paper describes the efficient preparation of an Mg2Ni alloy for hydrogen storage via high-energy ball milling mechanical alloying. The alloy's amorphisation degree increases with ball-milling time. After 4 hours of ball milling, partially amorphous alloys show the best hydrogen storage performance. Partial substitution of Ni with Cr and Mn improves the thermodynamics, kinetics, and cycling performance of the alloy. Mg2Ni0.8Mn0.2 exhibits the best cycling and hydrogen absorption/desorption kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
J. R. Tena-Garcia, M. Osorio-Garcia, K. Suarez-Alcantara
Summary: Mixtures of LiBH4/VCl3 and LiAlH4/VCl3 with different stoichiometries were prepared and tested for hydrogen release. The mixtures showed diverse hydrogen release levels and exhibited a change in reaction pathway at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Luis F. Contreras Vasquez, Yinzhe Liu, David Book
Summary: The synthesis, thermodynamic destabilisation, and hydrogen sorption properties of the M0.2Ca0.8MgH4 hydride system (where M = Na or Li) were investigated in this study. Substitution of Li and Na into Ca-Mg-H ternary hydride caused diffraction peaks to shift to higher angles, and different endothermic reactions were observed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yu Liu, Mark Paskevicius, Terry D. Humphries, Craig E. Buckley
Summary: This study demonstrates a one-step ball milling method using Mg2N3 as a reducing agent to regenerate sodium borohydride (NaBH4) from NaBO2$4H2O and produce ammonia gas. This simple process can generate two carbon-free hydrogen carriers suitable for energy export from renewable sources.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Navid Hosseinabadi
Summary: Polymer matrix nanocomposites with PMMA as a continuous and uniform phase, embedded with alkaline earth metal nanoparticles, are developed as efficient hydrogen storages; Their kinetic and structural properties are analyzed using various methods, showing good hydrogen storage performance; The uniformly dispersed nanoparticles in the polymer matrix make the nanocomposites suitable for atmospheric applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mateusz Balcerzak, Tomasz Runka, Zbigniew Sniadecki
Summary: BCC alloys with carbon catalysts show improved hydrogenation kinetics, lower desorption temperature, and enhanced hydrogen absorption rate, making them promising materials for hydrogen storage applications.
Article
Materials Science, Multidisciplinary
Aqeel Abbas, Kun-Che Hu, Hsin-Chih Lin, Kun-Ming Lin
Summary: The commercial magnesium alloy ZK60 was used as a hydrogen storage material, with the addition of activated carbon and copper to investigate their effects on hydrogen absorption characteristics. The addition of 5 wt% activated carbon increased hydrogen absorption capacity, while the addition of copper reduced absorption kinetics and increased hydrogen capacity. Microstructural observations showed that ball milling reduced grain size and the addition of copper produced new phases.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Uttam Kumar Murmu, Abhishek Ghosh, Asiful H. Seikh, Ibrahim A. Alnaser, Hany S. Abdo, Naif S. Alowaysi, Manojit Ghosh
Summary: This study investigates the fabrication and characterization of Cu-Ti-B alloys through ball milling of Cu, Ti, and B powders, focusing on the in situ formation of TiB2 and its impact on the mechanical properties of the composites. The results indicate that the in situ formation of TiB2 particles plays a crucial role in determining the mechanical properties of the alloys, which improve with increasing Ti and B content.
Review
Chemistry, Physical
N. A. Sazelee, M. Ismail
Summary: LiAlH4 is considered a potential material for solid-state hydrogen storage due to its high hydrogen content, but challenges like high decomposition temperature and slow dehydrogenation hinder its wider applications. Methods such as mechanical milling and catalyst doping have shown improvements in efficiency, but further technological advancements are needed to meet expected goals.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Amirreza Shirani Bidabadi, Andreas Korinek, Gianluigi A. Botton, Robert A. Varin
Article
Chemistry, Physical
Sanam Atashin, John Z. Wen, Robert A. Varin
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Chemistry, Physical
Robert A. Varin, Amirreza Shirani Bidabadi
JOURNAL OF POWER SOURCES
(2015)
Article
Nanoscience & Nanotechnology
Magda Lazinska, Tomasz Durejko, Stanislaw Lipinski, Wojciech Polkowski, Tomasz Czujko, Robert A. Varin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2015)
Article
Chemistry, Physical
Robert A. Varin, Ewelina E. Kosciuczyk, Tomasz Czujko
Article
Chemistry, Physical
Przemyslaw Litwa, Krzysztof Perkowski, Dariusz Zasada, Izabela Kobus, Gustaw Konopka, Tomasz Czujko, Robert A. Varin
JOURNAL OF ALLOYS AND COMPOUNDS
(2016)
Article
Nanoscience & Nanotechnology
Tomasz Durejko, Michal Zietala, Magda Lazinska, Stanislaw Lipinski, Wojciech Polkowski, Tornasz Czujko, Robert A. Varin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2016)
Article
Chemistry, Multidisciplinary
S. Atashin, J. Z. Wen, R. A. Varin
Article
Chemistry, Physical
Tomasz Durejko, Justyna Aniszewska, Michal Zietala, Anna Antolak-Dudka, Tomasz Czujko, Robert A. Varin, Vlad Paserin
Article
Chemistry, Physical
R. Parviz, R. A. Varin
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Article
Chemistry, Physical
P. Matysik, T. Czujko, R. A. Varin
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
R. A. Varin, R. Parviz
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
R. A. Varin, R. Parviz, M. Polanski, Z. S. Wronski
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
Robert A. Varin, Amirreza Shirani Bidabadi
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Materials Science, Multidisciplinary
Wojciech J. Stepniowski, Agata Nowak-Stepniowska, Adam Presz, Tomasz Czujko, Robert A. Varin
MATERIALS CHARACTERIZATION
(2014)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)