Article
Chemistry, Physical
Xunxiang Hu, Kurt A. Terrani
Summary: This paper reports the properties of unirradiated bulk yttrium hydride as a function of hydrogen concentration, providing a baseline measurement for further neutron irradiation response studies. It suggests the recommended empirical treatment of the data and discusses other properties that need to be investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
Nathan Dasenbrock-Gammon, Elliot Snider, Raymond McBride, Hiranya Pasan, Dylan Durkee, Nugzari Khalvashi-Sutter, Sasanka Munasinghe, Sachith E. E. Dissanayake, Keith V. V. Lawler, Ashkan Salamat, Ranga P. P. Dias
Summary: By studying a nitrogen-doped lutetium hydride, we have discovered a superconductor with a maximum critical superconducting transition temperature (T-c) of 294 K, which means superconductivity at room temperature and near-ambient pressures.
Article
Chemistry, Physical
Aditya Sundar, Yuqing Huang, Jianguo Yu, M. Nedim Cinbiz
Summary: Solid state hydrides, such as early transition metal hydrides, play a crucial role in the future of hydrogen energy. This study reveals the intricate bonding features and electron structure differences between early transition metal hydrides and alkali/alkaline earth metal hydrides, shedding light on their hydrogen retention and transport behavior.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Eli Grigorova, Pavel Markov, Boyko Tsyntsarski, Peter Tzvetkov, Ivanka Stoycheva
Summary: This study investigates the hydrogen sorption performance of materials based on 80 wt.% MgH2 with the addition of 15 wt.% Ni or V and 5 wt.% activated carbons synthesized from polyolefin wax, a waste product from polyethylene production (POW), walnut shells (CAN), and peach stones (CPS). The composition and performance of the samples are analyzed through milling, hydrogenation, X-ray diffraction, and TEM.
Article
Energy & Fuels
Sanjay Gupta, Vinod Kumar Sharma
Summary: This study characterizes the La0.9Ce0.1Ni5 alloy for use in a single-stage thermally driven sorption hydrogen compressor (TDSHC) and investigates the effects of operating temperature on hydrogen storage capacity and thermodynamic properties. Results show that an increase in operating temperature leads to a decrease in hydrogen storage capacity, an increase in reaction enthalpy, and a significant increase in equilibrium pressure. The TDSHC proposed in this study operates at temperatures and pressures to deliver compressed hydrogen efficiently.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Physical
Darren P. Broom, Michael Hirscher
Summary: Research on new reversible hydrogen storage materials has the potential to accelerate the transition to a hydrogen economy, but accurately measuring storage capacities has proved challenging.
Review
Chemistry, Multidisciplinary
Muruganantham Rethinasabapathy, Seyed Majid Ghoreishian, Seung-Kyu Hwang, Young-Kyu Han, Changhyun Roh, Yun Suk Huh
Summary: This review discusses recent progress and main research trends in hydrogen isotope storage and separation, with a focus on tritium. It highlights the use of metal hydrides, nanoporous zeolites, metal organic frameworks (MOFs), and 2-D layered graphene, h-BN, and MXenes based on their diverse functionalities.
ADVANCED MATERIALS
(2023)
Article
Environmental Sciences
Zia ur Rehman, Muhammad Awais Rehman, Bushra Rehman, Surajudeen Sikiru, Saima Qureshi, Esraa Mousa Ali, Muhammad Awais, Mahnoor Amjad, Iqra Iqbal, Anam Rafique, Saira Bibi
Summary: In this study, the characteristics and hydrogen storage properties of MgXH3 (X = Co, Cu, Ni) hydrides were analyzed using density functional theory. The results provide insights into the structural, mechanical, and electronic properties of perovskite hydrides, as well as their potential for hydrogen storage applications.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Mahvash Afzal, Nandlal Gupta, Aashish Mallik, K. S. Vishnulal, Pratibha Sharma
Summary: This study continues the computational analysis of a reactor with hexagonal honeycomb-based heat transfer enhancements, investigating the performance of a metal alloy and the reactor experimentally. It determines the gravimetric capacity and reaction kinetics of the alloy La0.9Ce0.1Ni5, while also exploring the impact of operating conditions on reactor performance. Additionally, evaporative cooling is tested for the first time as a heat removal technique for metal hydride based hydrogen storage reactors and found to significantly improve heat transfer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Nozomi Noto, Shigehito Isobe, Naoyuki Hashimoto
Summary: The research evaluated the dehydrogenation properties of several hydride-hydroxide systems and found that only the KH-LiOH system showed potential for reversible hydrogen adsorption/desorption, although rehydrogenation would require extremely high pressure.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
T. Kana, J. Cermak, L. Kral
Summary: Ab initio calculations were performed on Mg2Ni compound and its hydride Mg2NiH4 doped with elements X = Al, Ga, In, Si, Ge, and Sn, showing a reduction in hydrogen desorption enthalpy for both concentrations of X. Doping with In at low concentration weakened Ni-H bonds in Mg-2(Ni-In)H-4 hydride while enhancing bonding between Mg and H atoms. These findings provide valuable insights into enhancing hydrogen storage properties in metal hydride systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Muhammad Abaid Ullah, Khalid Nadeem Riaz, Muhammad Rizwan
Summary: In this study, Density Functional Theory (DFT) calculations were performed to investigate the structural, electronic, optical, and mechanical properties of perovskite hydride material KMgO3_xHx for hydrogen storage applications. The results show that the electronic properties of the compounds can be tailored by introducing dopants, making them suitable for various optoelectronic applications. Moreover, the incorporation of hydrogen has enhanced hydrogen storage characteristics, allowing a variety of transportation and practical uses in industry.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
YongJun Cho, Sichi Li, Jonathan L. Snider, Maxwell A. T. Marple, Nicholas A. Strange, Joshua D. Sugar, Farid El Gabaly, Andreas Schneemann, Sungsu Kang, Min-ho Kang, Hayoung Park, Jungwon Park, Liwen F. Wan, Harris E. Mason, Mark D. Allendorf, Brandon C. Wood, Eun Seon Cho, Vitalie Stavila
Summary: The study demonstrates a new approach to thermodynamically stabilizing metastable metal hydrides by coordinating them with nitrogen binding sites within nanopores. This allows for low-temperature hydrogen release and regeneration of LiAlH4 at high pressure, with a predicted decrease in Al-H bond dissociation energy. Additionally, solid-state reversibility is achieved through a combination of nanoconfinement effects, Li adatom formation, and charge redistribution between the metal hydride and the host.
Article
Energy & Fuels
Mykhaylo Lototskyy, Vladimir Linkov
Summary: This article presents the research and development activities related to thermally driven hydrogen compression using metal hydrides. The thermally driven metal hydride hydrogen compressor (MHHC) offers advantages such as simple design, high reliability, low operating costs, and high purity of hydrogen. The article focuses on the interrelation between the properties of metal hydride materials and their hydrogen compression performances, as well as the design features and optimization methods of hydrogen compression systems. A brief techno-economic analysis comparing MHHCs with alternative hydrogen compression technologies is also provided, along with outlining the promising application niches of MHHCs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Materials Science, Multidisciplinary
Xin F. Tan, Manjin Kim, Kazuhiro Yasuda, Kazuhiro Nogita
Summary: Bulk Mg-based hydrogen storage materials have the potential to provide a low-cost solution for energy storage and transportation. They are safer and more oxidation resistant compared to nano powders. Various alloying elements and innovative processing methods can be used to improve the performance of bulk Mg alloys in terms of hydrogen sorption kinetics and stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
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)