Article
Chemistry, Multidisciplinary
Harini Gunda, Keith G. Ray, Leonard E. Klebanoff, Chaochao Dun, Maxwell A. T. Marple, Sichi Li, Peter Sharma, Raymond W. Friddle, Joshua D. Sugar, Jonathan L. Snider, Robert D. Horton, Brendan C. Davis, Jeffery M. Chames, Yi-Sheng Liu, Jinghua Guo, Harris E. Mason, Jeffrey J. Urban, Brandon C. Wood, Mark D. Allendorf, Kabeer Jasuja, Vitalie Stavila
Summary: Metal boride nanostructures have great potential for hydrogen storage applications. However, their synthesis is challenging due to high surface energy, strong bonding, and difficult surface termination. Mechanochemical exfoliation of magnesium diboride in zirconia produces ultrathin MgB2 nanosheets with high yield. High-pressure hydrogenation and dehydrogenation of these nanosheets reveal a hydrogen capacity 50 times larger than bulk MgB2. The enhancement is attributed to defective sites created by ball-milling and incomplete Mg surface coverage. The exfoliation and creation of ultrathin layers offer a promising direction for high-capacity hydrogen storage.
Article
Chemistry, Physical
Ting Wang, Kondo-Francois Aguey-Zinsou
Summary: Borohydride nanoparticles were synthesized successfully using a modified ternary anti-precipitation method. The addition of a co-solvent and the carbon chain length of the stabilising surfactant play crucial roles in controlling particle size. This method offers an effective and simple way to prepare nanosized borohydride particles for hydrogen storage, while reducing the contamination of hydrogen release caused by stabilising surfactants.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Sai Smruti Samantaray, P. Anees, Vinayan Bhaghavathi Parambath, S. Ramaprabhu
Summary: Experimental studies and DFT calculations were conducted to investigate the hydrogen storage properties of graphene supported MgNi alloy nanoparticles nanocomposites. The results showed a significant enhancement in hydrogen storage capacity, with DFT calculations shedding light on the underlying adsorption mechanism.
Article
Chemistry, Physical
Parviz Hajiyev, Vasile Iosub, Michel Bardet, Stephanie Pouget, Francois Rieutord, Philippe Capron
Summary: This study investigates the effects of alkali cations, halide anion substitution, and borohydride anion vacancies on the dehydrogenation properties of ammine zinc borohydrides. The results show that the synthesis method using liquid ammonia successfully produces novel ammine zinc borohydride compounds, and first principle calculations and molecular dynamics techniques are used to interpret the complex hydrogen release mechanisms. It is found that the salt metathesis reaction can result in preferential halide anion substitution, which significantly affects the hydrogen storage properties. The conclusions of this study are applicable to not only the zinc system but also any ammine metal borohydride system.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Muhammad Amirul Nawi Ahmad, Noratiqah Sazelee, Nurul Amirah Ali, Mohammad Ismail
Summary: This review paper summarizes the latest research on additive-enhanced Mg(BH4)(2) for solid-state H-2 storage, discussing its impact on H-2 storage performance and addressing future prospects and challenges.
Article
Chemistry, Physical
Jakob B. Grinderslev, Mikael S. Andersson, Benjamin A. Trump, Wei Zhou, Terrence J. Udovic, Maths Karlsson, Torben R. Jensen
Summary: Complex metal hydrides are a diverse class of materials with properties relevant for hydrogen storage and solid-state electrolytes. Utilizing neutron diffraction, this study provided accurate information about crystal structures and discovered a new low-temperature polymorph. Investigating vibrational spectra of compounds using various techniques offered insights into hydrogen dynamics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Saad Salman, Yuwei Yang, Muhammad Zubair, Nicholas M. Bedford, Kondo-Francois Aguey-Zinsou
Summary: The core-shell approach provides a strategy to make complex hydrides reversible for hydrogen storage. The study designed freestanding core-shell NaBH4@Ni nanoarchitectures and investigated their hydrogen properties. The core-shell nanoarchitectures exhibited lower hydrogen release temperatures compared to bulk materials, suggesting potential catalytic applications.
Article
Nanoscience & Nanotechnology
Qiwen Lai, Chulaluck Pratthana, Yuwei Yang, Aditya Rawal, Kondo-Francois Aguey-Zinsou
Summary: The thermodynamic behavior of complex borohydrides confined in mesoporous hollow carbon spheres was investigated, showing no variation of equilibrium plateau pressure upon changes in the hydrogen sorption temperatures. This is interpreted as a result of the high pressure within the carbon nanopores, providing a means to control the thermodynamics of nanosized hydrides.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Jingjing Guo, Huiyan Zhao, Jing Wang, Ying Liu
Summary: A stable core-shell B12@Ca20C12 cluster with Ih symmetry, featuring a icosahedral Ih-B12 core surrounded by a dodecahedral Ca20C12 shell, has been discovered. This cluster shows excellent stability, with no destruction at high frequencies, and has the ability to store a large amount of hydrogen, making it a potential high-capacity hydrogen storage material.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Lasse G. Kristensen, Mads B. Amdisen, Lasse N. Skov, Torben R. Jensen
Summary: In this study, the structure, ionic conductivity, and thermal properties of isopropylamine magnesium borohydride based composites were investigated. Three new compounds were discovered and the relationship between high ionic conductivity and hydrophobic interactions was identified.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Environmental
Xin Zhang, Wenxuan Zhang, Lingchao Zhang, Zhenguo Huang, Jianjiang Hu, Mingxia Gao, Hongge Pan, Yongfeng Liu
Summary: Synthesizing nanostructured lithium borohydride without any supports can effectively improve its hydrogen storage reversibility. The resulting nano-LiBH4 shows superior hydrogen desorption and absorption capacity under high temperature and pressure, mainly due to the effective suppression of foaming.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Guojin Zhang, Daniel Morrison, Guochen Bao, Haibo Yu, Chang Won Yoon, Taekyong Song, Jihye Lee, Alison T. Ung, Zhenguo Huang
Summary: A new amine-borane system with reversible dehydrogenation and regeneration at room temperature has been discovered, producing unique dehydrogenation products with a distinct cyclic structure that can be easily converted back to the original amine-borane. This finding may pave the way for the discovery of new amine-boranes with potential applications as hydrogen storage materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Rasmeet Singh
Summary: This article critically evaluates the effectiveness of different boron-based hydrides in hydrogen storage, discusses the challenges in practical applications, and emphasizes the importance of using new materials and strategies to address these issues.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yuanyuan Shang, Ou Jin, Julian Atillio Puszkiel, Fahim Karimi, Palmarin Dansirima, Chongsutthamani Sittiwet, Rapee Utke, Siriwat Soontaranon, Thi Thu Le, Gokhan Gizer, Dorothee Vinga Szabo, Stefan Wagner, Christian Kuebel, Thomas Klassen, Martin Dornheim, Astrid Pundt, Claudio Pistidda
Summary: This study systematically investigates the effect of selected metal-based additives on the dehydrogenation properties of the reactive hydride composite (RHC) model system 2NaBH4+MgH2. The addition of 3TiCl3·AlCl3 enhances the dehydrogenation kinetics and changes the controlling mechanism of the second dehydrogenation step. Microstructural analysis using high-resolution transmission electron microscopy (HRTEM) reveals significant differences in the MgB2 morphology between the doped and undoped systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Feng Chen, Xinhui Zhang, Xiaoning Guan, Shuli Gao, Jinbo Hao, Long Li, Yazhao Yuan, Chunling Zhang, Wen Chen, Pengfei Lu
Summary: Twin T-graphene, nitrogen-doped twin T-graphene, and boron-doped twin T-graphene are potential hydrogen storage materials with high storage capacity, ideal adsorption energy, and suitable desorption temperature. This research expands the application of heteroatom-doped carbon-based materials.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Shunlong Ju, Jikai Ye, Yang Meng, Guanglin Xia, Xuebin Yu
Summary: Considering the challenges in cathode materials for aluminum-ion batteries, V6O13 is proposed as a promising candidate for the first time with the help of density functional theory calculations. It is found that aluminum ions can be reversibly stored in V6O13 through intercalation reactions, providing a high discharge voltage plateau. The use of a pre-lithiation strategy further improves the redox kinetics and leads to higher capacity and energy density. Additionally, the research reveals the shielding effect of pre-inserted Li and the accelerated diffusion rate at the atomic scale.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Wubin Du, Qinong Shao, Yiqi Wei, Chenhui Yan, Panyu Gao, Yue Lin, Yinzhu Jiang, Yongfeng Liu, Xuebin Yu, Mingxia Gao, Wenping Sun, Hongge Pan
Summary: In this study, a practical all-solid-state battery with high capacity and cycling stability was demonstrated. By optimizing the structure and composition of the electrolyte and cathode material, higher electronic and ionic conductivities were achieved, and some issues in liquid batteries were solved.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Xiaoyue Zhang, Yahui Sun, Shunlong Ju, Jikai Ye, Xuechun Hu, Wei Chen, Long Yao, Guanglin Xia, Fang Fang, Dalin Sun, Xuebin Yu
Summary: This paper demonstrates a concept of solar-driven reversible hydrogen storage of metal hydrides by utilizing the photothermal effect and catalytic role. The photothermal effect of Cu@MXene raises the temperature of the hydrogen storage material, while the hydrogen pump effect of Ti and TiHx species formed on the surface of MXene reduces the operating temperature, achieving efficient hydrogen storage.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Guilei Zhu, Wenbin Wang, Xuebin Yu
Summary: A facile approach is designed to fabricate carbon encapsulated NiS nanoparticles for binder-free cathode material. The resulting material exhibits enhanced electrochemical performance and long lifespan in hybrid Mg2+/Li+ batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yongfang Lai, Hongyu Zhang, Guanglin Xia, Xuebin Yu
Summary: By constructing an artificial solid-electrolyte interphase layer consisting of lithiophilic LiZn alloys and polymer-like [LiNBH]n chains with high Li ion conductivity, a dendrite-free Li metal anode with long-term stability has been achieved. The anode shows an ultralong lifespan and excellent electrochemical performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Zhongchen Zhao, Tian Xu, Xuebin Yu
Summary: Metal chalcogenide anodes with a layered structure have potential as K-based electrochemical energy storage devices, but the slow K-ion transport kinetics and poor structural stability hinder their development. This study investigates the energy storage behavior and links it to the capacity degradation of layer-structured WSe2. A single-phased WSe2 with pre-intercalated high K content is designed to overcome capacity degradation. Theoretical calculations demonstrate the beneficial effect of K-ions on boosting the electrochemical performance of WSe2. The novel design enables the pre-intercalated WSe2 anode material to exhibit high reversible specific capacity and cycling stability.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Chongyang Yuan, Tian Xu, Miao Guo, Tengfei Zhang, Xuebin Yu
Summary: In this study, phosphorus-doped Co3O4 was synthesized and it was found that the doping improved the catalytic activity for ammonia borane hydrolytic dehydrogenation. Furthermore, combining phosphorus doping with copper doping showed a strong synergistic effect and greatly enhanced the catalytic H2 generation. This research is important for designing more efficient metal-based nanocatalysts for energy conversion reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Hui Wu, Zhennan Xiong, Yiyang Mao, Huihui Zhang, Yingying Hu, Jun Shen, Baofeng Wang, Xuebin Yu
Summary: Developing new types of metal-ion batteries beyond lithium-ions is progressing quickly, but the lack of appropriate electrode materials has hindered their large-scale applications. In this study, a MoS2/MoO2/CC electrode material is developed, which effectively addresses the issues of ion diffusion distance, conductivity, and volume change. The electrode exhibits high reversible capacities, excellent rate capacities, and long-term cycling stability in magnesium-ion and sodium-ion storage.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yuqin Huang, Panyu Gao, Tengfei Zhang, Xiang Zhang, Guanglin Xia, Fang Fang, Dalin Sun, Zaiping Guo, Xuebin Yu
Summary: In this work, an ultra-stable electrode-solid electrolyte composite for high-performance all-solid-state lithium-ion batteries (ASSLIBs) is fabricated by uniformly covering each MgH2 nanoparticle with ultrathin Mg(BH4)(2) layers on the surface of graphene. The presence of Mg(BH4)(2) layers enhances the Li ion conductivity of the graphene-supported MgH2 nanoparticles, resulting in uniform stable interfaces with high ionic and electronic conductivity. Additionally, the stable framework of inactive Li2B6 and the structural support of graphene alleviate volume change and facilitate intimate contact, leading to an ultrahigh specific capacity of 800 mAh g(-1) for MgH2 after 350 cycles at 2 A g(-1).
Article
Chemistry, Multidisciplinary
Jiening Zheng, Tian Xu, Guanglin Xia, Wen-Gang Cui, Yaxiong Yang, Xuebin Yu
Summary: This study reports a new strategy of utilizing water-contained VOPO4·H2O to enhance Al3+ migration in Al ion batteries. It is revealed that VOPO4·H2O has a water lubrication effect and smaller steric hindrance, resulting in high capacity and fast Al3+ diffusion. However, the instability of water leads to rapid performance degradation. To solve this problem, ultrathin VOPO4·H2O@MXene nanosheets were fabricated to improve the cycling stability. The VOPO4·H2O@MXene composite delivers high discharge potential and maintains discharge capacities after cycling. This work provides new insights into water-contained AIBs cathodes and guidance for developing high-performance AIBs.
Article
Chemistry, Multidisciplinary
Hui Wu, Guanglin Xia, Xuebin Yu
Summary: Considering the abundance and low cost of sodium resources, sodium-ion batteries (SIBs) have been considered as potential alternatives to lithium-ion batteries (LIBs) due to their similar electrochemistry. However, the challenges of sluggish reaction kinetics, volume change, and low electric conductivity of iron-based electrode materials have hampered their long-term cycling stability and rate performance. This review summarizes recent progress in the development and design of nanostructured iron-based anodes for SIBs, focusing on the relationship between structural features and sodium storage performance, as well as addressing the current challenges and future directions for improving iron-based anodes.
Article
Chemistry, Physical
Wubin Du, Qinong Shao, Yiqi Wei, Chenhui Yan, Panyu Gao, Yue Lin, Yinzhu Jiang, Yongfeng Liu, Xuebin Yu, Mingxia Gao, Wenping Sun, Hongge Pan
Summary: A practical all-solid-state battery with high capacity and cycling stability has been demonstrated for the first time. The electronic and ionic conductivities are improved by precisely tailoring the composition and structure. Moreover, the typical issues found in liquid batteries are substantially eliminated in this all-solid-state battery.
ACS ENERGY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Xiaowei Chen, Jiahe Lin, Qiubao Lin, Renquan Li, Guanglin Xia, Weidong Zou, Xuebin Yu
Summary: Two-dimensional CP2 and LixCP2 (x = 1 and 2) monolayers with high-mobility transport anisotropy and tunable electronic and optical properties were identified. Lithiated CP2 showed a transition from semiconductor to semimetal, while Li2CP2 exhibited a semimetal to direct band-gap semiconductor transition. All these materials have promising potential for future applications in electronics, photovoltaics, and optoelectronic devices.
Article
Chemistry, Physical
Jiening Zheng, Tian Xu, Guanglin Xia, Xuebin Yu
Summary: This study demonstrates the fabrication of oxygen-deficient Co3O4-x porous nanosheets with good pseudocapacitive performance and high cycling stability through atomic-level structure modulation. The nanosheets have fast Al3+ ion storage/release kinetics and high Al3+ storage capacity, leading to high reversible capacity and cycle life.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Yang Meng, Shunlong Ju, Wei Chen, Xiaowei Chen, Guanglin Xia, Dalin Sun, Xuebin Yu
Summary: By fabricating V4Nb18O55 microspheres, the H-2 desorption and absorption properties of MgH2 can be improved and the uniform formation of Nb/V interfaces can be achieved, resulting in the reduction of dehydrogenation temperature of MgH2 and the enhancement of hydrogenation reaction rate.
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)
