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
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
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
Taejun Ha, Sang-In Lee, Jihyun Hong, Young-Su Lee, Dong-Ik Kim, Jin-Yoo Suh, Young Whan Cho, Byeongchul Hwang, Joonho Lee, Jae-Hyeok Shim
Summary: The microstructure and hydrogen storage properties of as-cast and annealed TiFe-6 wt % ZrCr2 alloy samples were investigated. Both samples exhibited three phases, with the amount of TiFe2 significantly reduced and fragmented in the annealed sample. Both samples were able to be hydrogenated under 31 bar of hydrogen at room temperature, with the annealed sample requiring an incubation period of around 40 hours.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Mehmet Erman Mert
Summary: The study investigated the efficiency of hydrogen production by doping nickel foam precursors with nickel, cobalt particles, and decorating with silver nano-domes. The catalyst NF/NiCo-2/Ag showed the best performance in terms of lower hydrogen overpotential, higher HPE, stability, and response during the electrolysis process in 1 M KOH.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Chemical
Nadia Bouaziz, Chaker Briki, Essebti Dhahri, Abdelmajid Jemni, Abdelmottalen Ben Lamine
Summary: The microstructure and hydrogen storage properties of LaNi4Co0.5Mn0.5 alloy were investigated. It was found that partial substitution of Ni by Mn and Co affected the long-term hydrogen absorption and desorption properties. The alloy showed a single LaNi5 phase structure. The study provided important insights into the absorption mechanism and revealed that the absorption of H-gas in the alloy was characterized by chemical interactions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Mingyang Cao, Mingqiang Li, Siyuan He, Jinying Yu
Summary: A new type of water-based rechargeable zinc-ion battery is proposed, which exhibits high reversible specific capacity and cycling stability. Experimental studies confirm that the reversible deintercalation-intercalation of zinc ions in the cathode is the reaction mechanism of the battery.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Vaishnavi B. R. Krupa, Arup Dasgupta, Chanchal Ghosh, Shyam Kanta Sinha
Summary: This study investigates the structural modification in nanocrystalline yttria induced by high energy ball-milling as a function of milling duration. It is found that as the milling duration progresses, the cubic phase gradually transforms to the monoclinic phase, and the monoclinic phase is more stable at smaller sizes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Dirk Franz, Ulrike Schroeder, Roman Shayduk, Bjoern Arndt, Heshmat Noei, Vedran Vonk, Thomas Michely, Andreas Stierle
Summary: The investigation revealed that Ir-seeded Pd nanocluster superlattices can be grown on graphene with high structural perfection, showing different expansion behavior upon hydrogen exposure. The results indicate that ultrasmall Pd clusters on graphene exhibit stable hydrogen storage properties.
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
Multidisciplinary Sciences
Yuting Luo, Shahed Rezaei, David A. Santos, Yuwei Zhang, Joseph Handy, Luis Carrillo, Brian J. Schultz, Leonardo Gobbato, Max Pupucevski, Kamila Wiaderek, Harry Charalambous, Andrey Yakovenko, Matt Pharr, Bai-Xiang Xu, Sarbajit Banerjee
Summary: This study examines the differences in electrochemical performance of V2O5 insertion electrodes with different crystal structures. The results show that the tunnel-structured V2O5 electrode has a simpler insertion mechanism and better battery performance compared to the layered V2O5 electrode, which undergoes a series of phase transformations and distortions, resulting in larger voltage hysteresis and capacity loss.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Energy & Fuels
Zeming Yuan, Xiaoming Li, Tao Li, Tingting Zhai, Yonghua Lin, Dianchen Feng, Yanghuan Zhang
Summary: Ball milling can greatly improve the hydrogen storage performances of Sm5Mg41 alloy by increasing surface activity and introducing nanocrystalline grain boundaries for enhanced hydrogen diffusion. The alloy milled for 10 hours exhibits the best hydrogen storage property.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Adam Revesz, Roman Paramonov, Tony Spassov, Marcell Gajdics
Summary: A high-energy ball milling method was used to synthesize nanocrystalline MgH2 powder samples catalyzed by Fe2Ti with different milling times (1 h, 3 h, and 10 h). The morphology and microstructure of the powders were characterized by scanning electron microscopy and X-ray diffraction. The diffraction profiles were analyzed using a convolutional multiple whole profile fitting algorithm to determine microstructural parameters of the composites. The dehydrogenation characteristics of the alloys were investigated using differential scanning calorimetry. An optimal milling time of 3 h was found to result in desorption at the lowest temperature. X-ray diffraction of partially dehydrided states confirmed a two-step H-release. The effect of milling time on the hydrogenation performance was evaluated using a Sievert-type apparatus, and the composite milled for 3 h exhibited the best overall performance.
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
Chemistry, Physical
Munmun Basak, Md Lutfor Rahman, Md Farid Ahmed, Bristy Biswas, Nahid Sharmin
Summary: Cobalt ferrite nanoparticles were synthesized using co-precipitation technique with different precipitating agents, affecting the structure and size distribution. Various analysis methods showed highly correlated results, with SSP method being the most compatible.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Coatings & Films
Bahman Daneshian, Frank Gaertner, Hamid Assadi, Daniel Hoeche, Wolfgang Weber, Thomas Klassen
Summary: The impact behavior of ceramic particles in aerosol deposition is influenced by particle sizes, with particles of 25-75 nm exhibiting three different impact behaviors and larger particles not exhibiting bonding behavior. The bonding of particles to the substrate is caused by localized inelastic deformation and shear localization. Heat diffusion at small scales depends on particle size, with larger particles generating localized heat which supports deformation and the formation of dense layers in aerosol deposition.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Neslihan Aslan, Goekhan Gizer, Claudio Pistidda, Martin Dornheim, Martin Mueller, Sebastian Busch, Wiebke Lohstroh
Summary: The addition of LiBH4 to form Li4(BH4)(NH2)3 significantly improves the hydrogen storage performance of reactive hydride composite Mg(NH2)2+2LiH. The study reveals localized rotational motions in Li4(BH4)(NH2)3 at temperatures below 514 K, and the activation energy for the rotational motion is determined through QENS measurements.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Fahim Karimi, Stefan Borries, P. Klaus Pranzas, Oliver Metz, Armin Hoell, Gokhan Gizer, Julian A. Puszkiel, Maria V. C. Riglos, Claudio Pistidda, Martin Dornheim, Thomas Klassen, Andreas Schreyer
Summary: The study investigated the LiBH2-MgH2 composite system with and without ScCl3 additive using synchrotron- and neutron-radiation-based probing methods to characterize their hydrogen storage properties. By combining neutron- and photon-based methods, the research provided insights into reaction mechanisms, interactions, material transport, and structural changes in the metal-hydrogen systems.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Chemistry, Physical
Sophida Thiangviriya, Praphatsorn Plerdsranoy, Annbritt Hagenah, Thi Thu Le, Pinit Kidkhunthod, Oliver Utke, Martin Dornheim, Thomas Klassen, Claudio Pistidda, Rapee Utke
Summary: This study investigates the substitution of Ni atoms for Fe atoms in Mg2FeH6, analyzing the hydrogenation and dehydrogenation kinetics, reaction mechanisms, and effects of Ni-loading contents on material properties and reversibility. The crystal structure of a new Ni-substituted Mg2FeH6 phase is confirmed in this work. Overall, the study provides insights into improving the kinetics and reversibility of Mg2FeH6 for hydrogen storage applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Metallurgy & Metallurgical Engineering
Yuanyuan Shang, Claudio Pistidda, Goekhan Gizera, Thomas Klassen, Martin Dornheim
Summary: Magnesium and magnesium based compounds have been extensively studied as potential hydrogen and thermal energy storage materials due to their abundance and high storage densities. Efforts have been made by the scientific community to improve their properties while maintaining high hydrogen storage capacity.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Energy & Fuels
Claudio Pistidda, Archa Santhosh, Paul Jerabek, Yuanyuan Shang, Alessandro Girella, Chiara Milanese, Maria Dore, Sebastiano Garroni, Simone Bordignon, Michele R. Chierotti, Thomas Klassen, Martin Dornheim
Summary: This study investigates the impact of energy transferred during particle collisions in a milling process on solid-gas reactions, with the synthesis of Mg(BH4)2 chosen as a model reaction. The results show that the energy transferred to the powder bed by the powder particles during milling is significant, especially when the milling process is prolonged.
JOURNAL OF PHYSICS-ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Clarissa Abetz, Prokopios Georgopanos, Claudio Pistidda, Thomas Klassen, Volker Abetz
Summary: Hydrogen is crucial for the transition to a sustainable future without CO2 emissions. It can be produced from renewable energy sources like solar and wind power and used to buffer energy fluctuations in all sectors. Safe and efficient storage options, such as metal hydride materials, are essential for hydrogen technology implementation.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Carmen Tenholt, Daniel Hoeche, Mauricio Schieda, Thomas Klassen
Summary: Most research on photo-electrochemical (PEC) cells for water splitting has been based on simulations and experiments on laboratory scales. This study investigates the effects of stepwise upscaling of PEC cells and develops a computer-aided reference model to predict their behavior on different scales. Machine learning via Bayesian optimization is employed to optimize the simulation model input parameters, resulting in good agreement with measured current-voltage curves.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Biochemistry & Molecular Biology
Ou Jin, Yuanyuan Shang, Xiaohui Huang, Dorothee Vinga Szabo, Thi Thu Le, Stefan Wagner, Thomas Klassen, Christian Kuebel, Claudio Pistidda, Astrid Pundt
Summary: The addition of 3TiCl(3)center dot AlCl3 is found to improve the dehydrogenation kinetics of the reactive hydride composite LiBH4-MgH2. The growth process of MgB2 is studied, and it is observed that MgB2 prefers to form on TiB2 nanoparticles due to the creation of an interface that reduces the elastic strain energy density. The kinetics of MgB2 growth is described by the JMAK equation, and it is suggested that the nucleation center change from Mg to TiB2 leads to a transition from interface- to diffusion-controlled growth, resulting in a change in MgB2 morphology.
Article
Chemistry, Physical
Archa Santhosh, ShinYoung Kang, Nathan Keilbart, Brandon C. Wood, Thomas Klassen, Paul Jerabek, Martin Dornheim
Summary: This study investigates the growth and nature of oxide films on the surface of TiFe intermetallic compound using first-principles methods. Different structures and temperature effects of oxide phases are studied in detail. The interaction between the oxidized surface and hydrogen is evaluated, providing important insights for the design of activation methods for TiFe and related materials as hydrogen storage materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Yuanyuan Shang, Shaofei Liu, Zhida Liang, Florian Pyczak, Zhifeng Lei, Tim Heidenreich, Alexander Schoekel, Ji-jung Kai, Gokhan Gizer, Martin Dornheim, Thomas Klassen, Claudio Pistidda
Summary: By synthesizing FeTi alloys from industrial scraps in an environmentally sustainable way, the carbon footprint associated with their production can be reduced without compromising their hydrogen storage properties.
COMMUNICATIONS MATERIALS
(2022)
Review
Energy & Fuels
Martin Dornheim, Lars Baetcke, Etsuo Akiba, Jose-Ramon Ares, Tom Autrey, Jussara Barale, Marcello Baricco, Kriston Brooks, Nikolaos Chalkiadakis, Veronique Charbonnier, Steven Christensen, Jose Bellosta von Colbe, Mattia Costamagna, Erika Dematteis, Jose-Francisco Fernandez, Thomas Gennett, David Grant, Tae Wook Heo, Michael Hirscher, Katherine Hurst, Mykhaylo Lototskyy, Oliver Metz, Paola Rizzi, Kouji Sakaki, Sabrina Sartori, Emmanuel Stamatakis, Alastair Stuart, Athanasios Stubos, Gavin Walker, Colin J. Webb, Brandon Wood, Volodymyr Yartys, Emmanuel Zoulias
Summary: There has been a significant increase in industrial and public interest in hydrogen technologies recently, as hydrogen is seen as the ideal means for storing, transporting, and utilizing energy in combination with renewable and green energy sources. Green hydrogen production, storage, and usage are considered key technologies in future energy systems. Material-based systems for hydrogen storage and compression offer advantages over traditional systems, including lower maintenance costs, higher reliability, and safety. This paper summarizes the latest developments in hydrogen carriers for storage and compression and provides an overview of research activities in this field.
PROGRESS IN ENERGY
(2022)
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, Multidisciplinary
Yuanyuan Shang, Claudio Pistidda, Chiara Milanese, Alessandro Girella, Alexander Schokel, Thi Thu Le, Annbritt Hagenah, Oliver Metz, Thomas Klassen, Martin Dornheim
Summary: This manuscript proposes a method for obtaining high-quality NaAlH4 from automotive recycled alloy, and comprehensively explores its hydrogen storage properties using various experimental techniques. The results show that NaAlH4 with comparable properties to high-purity commercial NaAlH4 was successfully synthesized.
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)
