Article
Chemistry, Physical
Rahul U. Urunkar, Sharad D. Patil
Summary: The thermal management of hydride-based hydrogen storage reactor was studied using numerical analysis and mathematical modeling. The study found that CuO/HTF nanofluid with a concentration of 5% exhibited the best absorption rate and improved heat exchange properties in the hydride reactor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Noratiqah Sazelee, Nurul Shafikah Mustafa, Muhammad Syarifuddin Yahya, Mohammad Ismail
Summary: Adding 10wt% spherical SrTiO3 catalyst can decrease the onset desorption temperature and enhance the desorption kinetics of NaAlH4. The decrease in apparent activation energy and improvement in desorption properties of NaAlH4 are attributed to the reduction of the physical structure of NaAlH4 by SrTiO3 during ball milling.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Physical
Gabriel Rodrigues de Almeida Neto, Felipe Henrique Matheus, Cesar Augusto Goncalves Beatrice, Daniel Rodrigo Leiva, Luiz Antonio Pessan
Summary: This review introduces the potential of hydrogen as an energy vector to replace fossil fuels and the development of hydrogen storage methods. The combination of polymer composites with hydride-forming metals (HFM) is a recent approach that improves the properties of HFM. The article summarizes the latest findings in this area.
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
Materials Science, Multidisciplinary
Wei Chen, Lei You, Guanglin Xia, Xuebin Yu
Summary: By utilizing Co-doped nanoporous carbon scaffolds as a structural host, this study successfully enhanced the hydrogen storage performance of NaAlH4 by removing Co nanoparticles to improve the catalytic effect and stability of nanoconfined spaces, achieving lower hydrogen storage temperature and higher cyclic stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yahui Sun, Xiaoyue Zhang, Wei Chen, Jikai Ye, Shunlong Ju, Kondo-Francois Aguey-Zinsou, Guanglin Xia, Dalin Sun, Xuebin Yu
Summary: The study proposes a light-mediated catalytic strategy that utilizes the coupling of photothermal and catalytic effects to achieve reversible hydrogen storage. Experimental results demonstrate that complete hydrogen release is achieved within 7 minutes under light irradiation for NaAlH4 with the catalysis of TiO2@C. The strategy is also applicable to other light metal hydrides and provides an alternative approach to electric heating.
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
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
A. M. Neves, J. Puszkiel, G. Capurso, J. M. Bellosta von Colbe, C. Milanese, M. Dornheim, T. Klassen, J. Jepsen
Summary: This study develops a comprehensive gas-solid kinetic model for the Lithium-Boron Reactive Hydride Composite System, determining the limiting step of the hydrogenation reaction through thermodynamic measurements and kinetic analysis. The dependence of the reaction rate constant on pressure and temperature is calculated based on the model, providing insights for designing optimized hydrogen/energy storage vessels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(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)
Review
Energy & Fuels
Noratiqah Sazelee, Nurul Amirah Ali, Muhammad Syarifuddin Yahya, Nurul Shafikah Mustafa, Firdaus Abdul Halim Yap, Saiful Bahri Mohamed, Muhammad Zahruddin Ghazali, Suwamo Suwarno, Mohammad Ismail
Summary: This study reviewed the recent developments in the hydrogen storage performance of magnesium hydride (MgH2) and its composite system with lithium alanate (LiAlH4) (Mg-Li-Al). The concept of destabilization has been extensively explored and proved effective in reducing desorption temperature and improving sorption properties. The intermetallic alloys formed during the dehydrogenation process provide thermodynamic and kinetic destabilization in the Mg-Li-Al system.
FRONTIERS IN ENERGY RESEARCH
(2022)
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
Wei Chen, Yahui Sun, Tian Xu, Jikai Ye, Guanglin Xia, Dalin Sun, Xuebin Yu
Summary: In this study, a bimetallic sheet-like nanoporous carbon material was designed to improve the hydrogen storage performance of 2LiBH4-MgH2 composite. The material successfully reduced the incubation period and improved the cycling stability of hydrogen storage process.
ACS APPLIED ENERGY MATERIALS
(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
Chemistry, Physical
F. J. Antiqueira, D. R. Leiva, G. Zepon, W. J. Botta
Summary: In recent studies, it was found that high energy ball milling of Mg/MgH2 mixed with additives can reduce the temperature for H-2 absorption/desorption without altering thermodynamic properties. This research aimed to identify efficient hydrogen absorption/desorption catalysts at low temperatures, particularly at room temperature (RT). Among the additives tested in this study, MgH2-TiFe mixture showed the best performance, attributed to the strong catalytic action of TiFe and the high energy interfaces attracting hydrogen gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
R. Skoryunov, O. A. Babanova, A. Soloninin, J. B. Grinderslev, A. Skripov, T. R. Jensen
Summary: The study investigates the dynamical properties of the LiBH4•NH3 compound using nuclear magnetic resonance techniques, revealing the coexistence of four types of BH4 reorientational jump processes with different activation energies. The fastest process involves rotations around a single 3-fold symmetry axis of the BH4 tetrahedron, while slower processes are attributed to reorientations around other symmetry axes. There were no signs of diffusive Li+ jumps within the temperature range studied.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Torben R. Jensen, Mads B. Amdisen, Jakob B. Grinderslev, Lasse N. Skov
Summary: Solid-state magnesium electrolytes are crucial for the development of rechargeable batteries with high capacities, yet there is a lack of electrolytes that meet the requirements. In this study, six new compounds of methylamine magnesium borohydride were synthesized and their properties were investigated. One of the compounds showed a record high ionic conductivity of Mg2+ and exhibited stability towards magnesium electrodes.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Lasse G. Kristensen, Mads B. Amdisen, Mie Andersen, Torben R. Jensen
Summary: The discovery of new inorganic magnesium electrolytes may lead to the development of novel solid-state batteries through the investigation of a new type of organic-inorganic metal hydride with hydrophobic domains. The structure of this metal hydride was determined and its properties were optimized through various methods. Nanoparticles and heat treatment were found to enhance the conductivity and stability of the composite material.
Article
Chemistry, Physical
Chongyang Zhou, Han Sun, Qian Wang, Jakob B. Grinderslev, Dan Liu, Yigang Yan, Torben R. Jensen
Summary: Designing solid electrolytes compatible with high-voltage cathodes for all-solid-state lithium batteries is challenging. In this study, a nanocomposite Li2B12H12-Al2O3 was treated for 120 hours, resulting in an electrochemical stability window up to approximately 3.8 V and a high lithium ionic conductivity of Sigma(Li+) = 2.73 x 10-5 S cm-1 at 30 degrees C due to the interfacial interaction via B-O bonds. The electrolyte also exhibited compatibility with the lithium metal anode, demonstrating stable Li plating/stripping for 300 cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
Lasse N. Skov, Jakob B. Grinderslev, Torben R. Jensen
Summary: This study presents the first cathode investigation of an inorganic all-solid-state magnesium battery, using a magnesium metal anode, a nanocomposite electrolyte, and a layered titanium disulfide as the cathode active material. The structural transformations of different-sized titanium disulfide particles are studied at different stages of the battery life. The reversible magnesium intercalation occurs in three structurally distinct phases, and a maximum discharge capacity is observed for smaller titanium disulfide particles.
BATTERIES & SUPERCAPS
(2023)
Article
Chemistry, Inorganic & Nuclear
Filippo Peru, Seyedhosein Payandeh, Torben R. Jensen, Georgia Charalambopoulou, Theodore Steriotis
Summary: A composite material of 0.71 LiBH4-0.29 NaBH4 and CMK-3 carbon with nanopores was successfully synthesized, showing improved hydrogen absorption-desorption kinetics. After five cycles, the composite maintained a consistent uptake of about 3.5 wt.% H-2. The enhanced kinetics were attributed to carbon-hydride surface interactions and the heat transfer capability of the carbon support. The nanopore confinement may also contribute to the improved reversibility.
Review
Materials Science, Multidisciplinary
Xiao Li, Yigang Yan, Torben R. Jensen, Yaroslav Filinchuk, Iurii Dovgaliuk, Dmitry Chernyshov, Liqing He, Yongtao Li, Hai-Wen Li
Summary: Mg(BH4)2 is a high capacity hydrogen storage material with new functions of gas physisorption and ionic conductivity. This review summarizes the recent progress on its energy related functions, including reversible hydrogen storage, gas adsorption, and electrolyte application.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Chongyang Zhou, Yigang Yan, Torben R. Jensen
Summary: The introduction of LiBH4 into Li2B12H12-5Li(2)B(10)H(10) improves its electrochemical window to 3.0 V and Li-ion conductivity to 1.0 x 10(-4) S cm(-1) at room temperature. Moreover, the Li(2)B(12)H(12)-5Li(2)B(10)H(10)-6LiBH(4) electrolyte exhibits good compatibility with a metallic Li anode and TiS2 cathode, allowing stable operation of the all-solid-state cell for 120 cycles with high capacity and coulombic efficiency. This work demonstrates the potential of a hydroborate electrolyte for the development of high voltage all-solid-state batteries.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Jakob B. Grinderslev, Lasse N. Skov, Torben R. Jensen
Summary: Utilization of next-generation all-solid-state lithium batteries requires new fast Li-ion conducting solid electrolytes. LiBH4-based materials have shown promising high ionic conductivity at room temperature. A new compound, hemi-methylamine lithium borohydride (LiBH4 & BULL;1/2CH(3)NH(2)), with a crystal structure consisting of two-dimensional layers, has been discovered. This compound exhibits high lithium ion conductivity and electrochemical stability, making it suitable for battery operation. However, it is incompatible with layered TiS2 cathode, limiting its full charging potential.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Kyran Williamson, Kasper T. T. Moller, Anita M. M. D'Angelo, Terry D. D. Humphries, Mark Paskevicius, Craig E. E. Buckley
Summary: This study introduces a new reactive carbonate composite (RCC) that uses Fe2O3 to destabilize BaCO3 and reduce its decomposition temperature, making it more suitable for thermal energy storage. The RCC demonstrates promising potential for next-generation thermal energy storage due to its low cost and high energy density. The thermodynamic parameters for the reversible CO2 reactions were determined and found to be significant for the RCC.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Energy & Fuels
Tolga Han Ulucan, Sneha A. Akhade, Ajith Ambalakatte, Tom Autrey, Alasdair Cairns, Ping Chen, Young Whan Cho, Fausto Gallucci, Wenbo Gao, Jakob B. Grinderslev, Katarzyna Grubel, Torben R. Jensen, Petra E. de Jongh, Jotheeswari Kothandaraman, Krystina E. Lamb, Young-Su Lee, Camel Makhloufi, Peter Ngene, Pierre Olivier, Colin J. Webb, Berenger Wegman, Brandon C. Wood, Claudia Weidenthaler
Summary: Efficient storage of hydrogen is a significant challenge for the potential hydrogen economy. Liquid carriers provide an attractive alternative to low-temperature compression or liquefaction, offering cost-effective storage and easy integration with existing infrastructure.
PROGRESS IN ENERGY
(2023)
Review
Energy & Fuels
Erika Michela Dematteis, Mads B. Amdisen, Tom Autrey, Jussara Barale, Mark E. Bowden, Craig E. Buckley, Young Whan Cho, Stefano Deledda, Martin Dornheim, Petra de Jongh, Jakob B. Grinderslev, Goekhan Gizer, Valerio Gulino, Bjorn C. Hauback, Michael Heere, Tae Wook Heo, Terry D. Humphries, Torben R. Jensen, Shin Young Kang, Young-Su Lee, Hai-Wen Li, Sichi Li, Kasper T. Moller, Peter Ngene, Shin-ichi Orimo, Mark Paskevicius, Marek Polanski, Shigeyuki Takagi, Liwen Wan, Brandon C. Wood, Michael Hirscher, Marcello Baricco
Summary: This review paper provides an overview of the intense literature and research efforts on complex hydrides for energy storage applications. It focuses on recent advances in different complex hydride systems from the collaborative activities of research groups led by experts of the Task 40 'Energy Storage and Conversion Based on Hydrogen' of the International Energy Agency. The paper reviews materials design, synthesis, tailoring, modelling approaches, hydrogen release and uptake mechanisms, and thermodynamic aspects to define new trends and suggest new possible applications for these highly tuneable materials.
PROGRESS IN ENERGY
(2022)
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)
