Article
Materials Science, Multidisciplinary
Magnus M. Nygard, Oystein S. Fjellvag, Magnus H. Sorby, Kouji Sakaki, Kazutaka Ikeda, Jeff Armstrong, Ponniah Vajeeston, Wojciech A. Slawinski, Hyunjeong Kim, Akihiko Machida, Yumiko Nakamura, Bjorn C. Hauback
Summary: The study investigated the local structure in TiVCrNbDx to explore how to destabilize the remaining sites with respect to hydrogen/deuterium occupation. The analysis revealed a body-centred tetragonal structure for partially desorbed deuteride (x = 2.2), with a higher portion of occupied sites with low valence-electron concentration. Further strategies for destabilization of the hydride were motivated based on these observations.
Article
Chemistry, Physical
E. Novak, L. Daemen, K. Page, J. Neuefeind, M. Everett, T. Egami, N. Jalarvo
Summary: Barium hydride exhibits exceptional ionic transport properties at high temperatures, with a structural phase transition converting it into a fast ionic conductor through the introduction of disorder, deuterium site splitting, and dynamic structural fluctuations. Neutron scattering techniques and vibrational spectroscopy provide insights into the interplay between structure and dynamics governing the rare conduction process of hydride ions in solid-state materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Carly C. Carter, Ryan A. Klein, Wei Zhou, Terrence J. Udovic, Craig M. Brown, Ting-Bin Wen, Thomas R. Cundari, Muhammed Yousufuddin
Summary: The study characterized the metal-hydrogen and hydrogen-hydrogen interactions in a previously reported compound using diffraction and inelastic neutron scattering measurements, paired with molecular and solid-state density functional theory. Based on the findings, the compound was reclassified as a rare example of a non-classical compressed dihydride species.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Applied
Toyoto Sato, Shin-ichi Orimo
Summary: Hydrides are potential hydrogen storage materials with higher hydrogen densities, and their formation and decomposition reactions can be studied using INS to understand the chemical states and vibrational properties of hydrogen in hydrides, which play a crucial role in hydrogen storage research.
TOPICS IN CATALYSIS
(2021)
Article
Polymer Science
Gregory N. Smith, Erik Brok, Martin Schmiele, Kell Mortensen, Wim G. Bouwman, Chris P. Duif, Tue Hassenkam, Martin Alm, Peter Thomsen, Lise Arleth
Summary: This study aims to determine the precise distribution of hydrophilic polymers introduced into silicone medical devices and utilizes neutron scattering and microscopy techniques for investigation. The structures on the surface of these materials were found to be on the scale of 10-100 nm using atomic force microscopy and spin-echo small-angle neutron scattering.
Article
Energy & Fuels
Haoyuan Li, Qiang Fu, Hongyun Qin, Xia Chen, Qicheng Zhang, Hui Zhang, Shoudong Wang, Zixu Dong, Ming Wang
Summary: In this study, the controllable and continuous MgH2 hydrolysis was achieved by using an optimized porous filter element, which provides valuable reference for continuous MgH2 hydrolysis.
Article
Chemistry, Physical
Long Liang, Qingqing Yang, Shaolei Zhao, Limin Wang, Fei Liang
Summary: Rare-earth hydrogen storage alloy shows a catalytic effect in reducing the dehydrogenation temperature and improving the dehydrogenation kinetics of alane, providing a promising strategy for metal hydride modification.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mario Bedrunka, Nils Bornemann, Gerd Steinebach, Dirk Reith
Summary: This paper presents a feasibility study on on-board metal hydride storage systems, highlighting their advantages in replacing counterweights and utilizing heat emissions for energy. The main challenge lies in designing a system that can provide sufficient energy over a long period. The study concludes that using a metal hydride system shows great potential for practical applications in forklifts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Multidisciplinary
He Zhu, Yalan Huang, Jincan Ren, Binghao Zhang, Yubin Ke, Alex K. -Y. Jen, Qiang Zhang, Xun-Li Wang, Qi Liu
Summary: The correlation between structure and function is crucial in materials science and engineering. Modern functional materials often exhibit inhomogeneities at the atomic level, giving them unique properties related to electrons, phonons, and magnetic moments. The pair distribution function (PDF) technique has emerged as a powerful tool for detecting local structure away from average in functional materials, with the advancements in crystallographic techniques and the availability of synchrotron X-rays, spallation neutrons, and advanced computing power.
Article
Chemistry, Physical
ChuBin Wan, R. V. Denys, V. A. Yartys
Summary: The study investigated the structural composition and electrochemical capacity of four AB(2) Laves-type intermetallic alloys with different Ti/Zr ratios, revealing the gradual shrinkage of the unit cells of the C15 phase with increased Ti substitution for Zr. All studied alloys showed similar activation behaviors, requiring four cycles to achieve the highest electrochemical capacity of the anodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Nora K. Zimmerli, Christoph R. Mueller, Paula M. Abdala
Summary: Heterogeneous catalysts are complex materials that require advanced structural characterization tools to determine structure-performance relationships. Pair distribution function (PDF) analysis is a powerful method for extracting structural information from the atomic to the nanoscale.
TRENDS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Chen Jin, Haoyuan Zheng, Li Wang, Haizhen Liu, Xinhua Wang, Mi Yan
Summary: Adding rare earth hydride CeH2.51 significantly improves the hydrogen storage performance of Mg(NH2)2-2LiH, enhancing the hydrogen absorption/desorption kinetics and cycle performance. The sample doped with 7.5 wt% CeH2.51 shows the best comprehensive performance, with reduced activation energy and stable hydrogen storage capacity after cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Harry S. Geddes, Henry D. Hutchinson, Alex R. Ha, Nicholas P. Funnell, Andrew L. Goodwin
Summary: By using the non-negative matrix factorisation (NMF) approach, the study demonstrates how the pair distribution function (PDF) of complex mixtures can be separated into contributions from individual phase components and interfaces between phases, focusing specifically on a model system Fe parallel to Fe3O4. The experimental results show excellent agreement with theoretical predictions, highlighting the significance of this method in characterising interfaces in complex functional materials.
Article
Metallurgy & Metallurgical Engineering
Yaokun Fu, Lu Zhang, Yuan Li, Sanyang Guo, Han Yu, Wenfeng Wang, Kailiang Ren, Wei Zhang, Shumin Han
Summary: Hydrogen storage is a crucial aspect of the hydrogen economy, and solid-state hydrogen storage is the most promising approach. In this study, a ternary transition metal sulfide FeNi2S4 with a hollow balloon structure was designed as a catalyst for MgH2 to enhance its dehydrogenation/hydrogenation performance by constructing a MgH2/Mg2NiH4-MgS/Fe system.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Gamze Atalmis, Mehmet Demiralp, Nebi Yelegen, Yuksel Kaplan
Summary: This study investigates the process parameters that affect the improvement of hydrogen storage material properties. The thermal conductivity of the storage materials has been improved to accelerate the hydrogen charge/discharge processes and obtain the required hydrogen at desired flow rates in a short time. The experimental results show that coating the storage material with copper increases heat transfer, reduces the hydrogen charging time, and improves stable discharge time in the metal hydride reactor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Igor E. E. Golub, Michael Heere, Volodia Gounaris, Xiao Li, Timothy Steenhaut, Jian Wang, Koen Robeyns, Hai-Wen Li, Iurii Dovgaliuk, Kazutaka Ikeda, Geoffroy Hautier, Yaroslav Filinchuk
Summary: The highly complex crystal structure of stoichiometric Mg-5(en)(6)(BH4)(10) was determined using single crystal synchrotron X-ray diffraction and confirmed by neutron powder diffraction on isotopically substituted Mg(en)(1.2)((BD4)-B-11)(2). The role of amorphous Mg(BH4)(2) in the reactivity of the Mg(BH4)(2)-en system was emphasized, and a previously overlooked phase, Mg(en)(2)(BH4)(2), was characterized.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Rama Srinivas Varanasi, Motomichi Koyama, Hiroyuki Saitoh, Reina Utsumi, Toyoto Sato, Shin-ichi Orimo, Eiji Akiyama
Summary: The phase transformations and microstructure changes during the depressurization of non-hydrogenated and hydrogenated Fe-Mn-Si-Cr alloy were investigated. Understanding the effects of hydrogenation on the stability of the austenite phase in Fe-based alloys is crucial.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
M. R. Joo, J. H. Jeon, J. G. Jeon, S. J. Lee, K. M. Choi, T. W. Oh, J. W. Lee, S. E. Shin, H. J. Choi, H. Kang, J. H. Shin, K. Ikeda, D. H. Bae
Summary: Strong interactions between interfaces and other constituents in materials can enhance their performance. The interfacial structure, determined by interfacial chemistry and thermodynamics, plays a crucial role in this process. The authors propose a new strategy for tailoring high-ductility aluminum alloys by introducing a wide low-angle boundary (WLAB) structure. This structure, formed by interstitially located oxygen atoms in aluminum, partitions the grains into numerous sub-grains, resulting in increased ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biochemistry & Molecular Biology
Toyoto Sato, Hiroyuki Saitoh, Reina Utsumi, Junya Ito, Yuki Nakahira, Kazuki Obana, Shigeyuki Takagi, Shin-ichi Orimo
Summary: In this study, the hydrogen absorption reaction of LaNi5 under high pressures above 1 GPa was investigated, and it was found that LaNi5 absorbed 2.07% hydrogen at 6 GPa, indicating a higher hydrogen storage capacity compared to reactions below 1.0 MPa. Additionally, the hydrogen-absorbed LaNi5Hx decomposed into NiH under high-pressure conditions, and a new hydride phase with different crystal parameters was observed.
Article
Chemistry, Multidisciplinary
Kang Wu, Enyue Zhao, Peilin Ran, Wen Yin, Zhigang Zhang, Bao-Tian Wang, Kazutaka Ikeda, Toshiya Otomo, Xiaoling Xiao, Fangwei Wang, Jinkui Zhao
Summary: Introducing stacking-fault defects can localize oxygen lattice evolutions and stabilize the anionic redox reaction, eliminating oxygen releases and improving the reversibility and cycling stability of Li2MnO3 cathodes.
Article
Chemistry, Multidisciplinary
Kei Okamoto, Fumitaka Takeiri, Yumiko Imai, Masao Yonemura, Takashi Saito, Kazutaka Ikeda, Toshiya Otomo, Takashi Kamiyama, Genki Kobayashi
Summary: In this study, a Ba-Li-Na-H-O oxyhydride system was synthesized by partially substituting sodium for lithium in BLHO, leading to a significant improvement in conductivity. Our experimental results demonstrate that substituting at least 40% of lithium with sodium can enhance the conductivity of the oxyhydride system.
Article
Chemistry, Physical
Kazutaka Ikeda, Takuya Kimura, Koji Ohara, Toyoto Sato, Hidetoshi Ohshita, Atsushi Sakuda, Akitoshi Hayashi
Summary: Sodium solid electrolytes are considered preferable to lithium solid electrolytes for all-solid-state lithium-ion batteries. The heat treatment of Na3PS4 glass ceramics can greatly enhance the ionic conductivity, with vacancies in the ceramic material playing a crucial role in promoting Na ion conduction. The control of vacancies in solid electrolytes is essential for the design of practical all-solid-state sodium batteries.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Ayuko Kitajou, Satoshi Hiroi, Koji Ohara, Kazutaka Ikeda, Takuma Nanami, Shunsuke Muto
Summary: The xLiF-LiCrO2 series, prepared using the dry ball-milling method, showed improved electro-chemical properties compared to milled-LiCrO2. LiF addition changed the oxidation state of Cr, increasing the rechargeable capacity. The dry ball-milling treatment split the Li-O(F) correlation and changed the dispersion state of Li and Cr in the particles. The reversible capacity and the number of reacted electrons increased with the increasing x in xLiF-LiCrO2, and the charge-discharge reaction proceeded through Cr3+/Cr6+ redox couples.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Kazuaki Kisu, Rana Mohtadi, Shin-i. Orimo
Summary: Rechargeable Ca metal batteries have advantageous features for potential alternatives to Li-ion batteries, such as high energy density, cost-effectiveness, and natural elemental abundance. However, challenges in passivating Ca metal by electrolytes and a lack of efficient cathode materials with Ca2+ storage capabilities hinder the development of practical Ca metal batteries. In this study, the feasibility of using a CuS cathode and a tailored electrolyte for Ca metal batteries is confirmed, leading to a Ca metal battery with long cycle life and high capacity retention. This study can expedite the development of Ca metal batteries.
Article
Materials Science, Multidisciplinary
Hiroki Yamada, Koji Ohara, Satoshi Hiroi, Atsushi Sakuda, Kazutaka Ikeda, Takahiro Ohkubo, Kengo Nakada, Hirofumi Tsukasaki, Hiroshi Nakajima, Laszlo Temleitner, Laszlo Pusztai, Shunsuke Ariga, Aoto Matsuo, Jiong Ding, Takumi Nakano, Takuya Kimura, Ryo Kobayashi, Takeshi Usuki, Shuta Tahara, Koji Amezawa, Yoshitaka Tateyama, Shigeo Mori, Akitoshi Hayashi
Summary: Controlling Li ion transport in glasses is crucial for developing all-solid-state batteries. Li3PS4 glass, a solid electrolyte candidate, shows a dynamic coupling effect between Li+ cation mobility and PS43- anion libration, known as the paddlewheel effect. Additionally, it exhibits a coordinated cation diffusion effect (cation-cation interactions) that enhances Li ion transport. The correlation between Li+ ions in the glass structure can be determined by evaluating their valence oscillations, providing insights for the development of new solid electrolytes.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Yasuo Kameda, Yuko Amo, Takeshi Usuki, Kazutaka Ikeda, Takashi Honda, Toshiya Otomo
Summary: This study investigates the effect of intermolecular hydrogen bonds on the intramolecular O-D distance of methanol molecules in liquid state using time-of-flight neutron diffraction measurements and attenuated total reflection infrared spectra.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Physical
Yushi Fujita, Takuya Kimura, Minako Deguchi, Kota Motohashi, Atsushi Sakuda, Masahiro Tatsumisago, Hirofumi Tsukasaki, Shigeo Mori, Kazutaka Ikeda, Koji Ohara, Naoaki Kuwata, Koji Amezawa, Akitoshi Hayashi
Summary: All-solid-state lithium-ion batteries with flame-retardant inorganic solid electrolytes have great potential due to their high safety. Oxide-based solid electrolytes with high chemical stability and lithium-ion conductivity are attractive, and the development of new oxide-based solid electrolytes with high ionic conductivity and ductility is crucial for improving the overall performance of all-solid-state batteries.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Zhuanfang Jing, Yongquan Zhou, Toshio Yamaguchi, Koji Yoshida, Kazutaka Ikeda, Koji Ohara, Guangguo Wang
Summary: Ionhydration plays a crucial role in various fields, but the nature of ion hydration at the molecular level remains inconsistently understood. This study combines neutron scattering, wide-angle X-ray scattering, and molecular dynamics to systematically quantify the hydration ability of alkali metal and halide ions based on static and dynamic hydration numbers. The static hydration number is determined from positional information, while the dynamic hydration number measures the average number of water molecules in the first coordination shell of an ion over a residence time. These hydration numbers provide valuable insights for understanding different natural phenomena.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Akira Kudo, Kazuya Kanamaru, Jiuhui Han, Rui Tang, Kazuaki Kisu, Takeharu Yoshii, Shin-ichi Orimo, Hirotomo Nishihara, Mingwei Chen
Summary: This study reports the fabrication of hierarchically porous carbon microlattices (HPCMLs) using composite photoresin and stereolithography (SLA) 3D printing. The carbon microlattices have a hierarchical pore structure, including lattice architecture, macropores, mesopores, and micropores. The HPCMLs exhibit excellent mechanical properties and can be used as thick supercapacitor electrodes with high gravimetric and areal capacitances.
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)
