Article
Engineering, Environmental
Jingjing Liu, Xiangyu Chen, Jie Xu, Shuai Zhu, Honghui Cheng, Guo Yang, Xingbo Han, Lu Zhang, Yuan Li, Shumin Han
Summary: A new strategy based on structure characteristics analysis and First-principles calculation is proposed to enhance the cycling stability of superlattice hydrogen storage alloys. Experimental validation shows that the designed alloys maintain stable crystal structure and improved oxidation/corrosion resistance after cycling.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Toshiaki Fukagawa, Yasuyuki Saito, Akihiro Matsuyama
Summary: The study found that with an increase in x value, the secondary phase of HEAs increased, resulting in lower hydrogen storage capacity and unstable hydrides. After alkaline treatment, the HEA alloy surface changed, leading to increased discharge capacity, enhanced high-rate dischargeability, and cycle performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
A. N. Kazakov, D. V. Blinov, V. Yu Bodikov, S. V. Mitrokhin, A. A. Volodin
Summary: The study investigated the structure, hydrogen storage, and electrochemical properties of annealed low-Co AB5-type intermetallic compounds. Partial substitution of metals could improve the cycle life and capacity retention of the alloys, while low-Co alloys show better overall electrochemical properties compared to high-Co alloys.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Miao Miao Li, Chun Cheng Yang, Yi Tong Zhou, Chao Jun Cui
Summary: Coating HSAs with ZIF-8 using a simple wet-chemical method improves the electrochemical performance of the electrode by increasing discharge capacity, rate, and high-rate dischargeability.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Peng Li, Hui Wang, Wei Jiang, Jiangwen Liu, Liuzhang Ouyang, Min Zhu
Summary: The addition of In and Al to MgNi-based amorphous alloy can improve the crystallization temperature of the amorphous phase and hinder the formation of crystalline hydride, leading to enhanced cycling performance. Therefore, optimizing the alloy composition is crucial for improving the performance of MgNi-based alloys, and multi-component composition is beneficial for enhancing their structural and cyclic stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Miao Miao Li, Chang Chun Wang, Yi Tong Zhou, Chun Cheng Yang
Summary: The uniform coating of nanoparticle-shaped polyaniline on the surface of hydrogen storage alloys using an electroless method enhances electrochemical reaction kinetics and improves the performance of nickel-metal hydride batteries. The presence of a nickel-rich layer during the fast polymerization process contributes to the excellent electrochemical performances of the composite material.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Jingjing Liu, Shuai Zhu, Xiangyu Chen, Jie Xu, Lu Zhang, Kai Yan, Wei Chen, Honghui Cheng, Shumin Han
Summary: The article introduces a series of biphase superlattice hydrogen storage alloys (HSAs) with superior electrochemical properties compared to other alloys. Despite having slightly lower cycling stability than single-phase alloys, the biphase alloys exhibit good high-rate discharge performance, making them promising as advanced electrode materials for power batteries.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
He Wang, AnChun Tang, ChuBin Wan, WenXuan Yin, YuTing Wang, Xin Ju
Summary: The structure of Ce-doped Ti0.24Zr0.76Ni1.15Mn0.7V0.15 alloy was studied, and it was found that Ce formed a CeNi3 secondary phase instead of entering the Laves phases. The synergistic effect of CeNi3 and (Ti,Zr)Ni improved the hydrogen storage properties and electrochemical performances of the alloy. The Ce-doped AB2 alloy showed a higher hydrogen storage capacity, good cyclic stability, and faster activation rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Terry D. Humphries, Mark Paskevicius, Ali Alamri, Craig E. Buckley
Summary: Thermal batteries are efficient for storing renewable energies, utilizing reversible thermochemical reactions to drive a heat engine. Studies on the SrH2-2Al system have shown promising properties for high efficiency operation, which could enhance technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Marwa Ayari, Ines Sahli, Mouna Elghali, Ouassim Ghodbane, Hassen Jaafar, Mohieddine Abdellaoui
Summary: The new AB(3)-type compound CeTi2Ni4.5Al0.2Mn0.3Cr4 shows good structural and hydrogen absorption/desorption properties, prepared by mechanical alloying method, with favorable electrochemical performance and kinetics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Hang Lu, Yanan Guo, Qing Wang, Anyi Zhang, Yuan Li, Ning Xi, Xiaomei Zhu, Shumin Han, Lu Zhang
Summary: La-Mg-Ni-based alloys with a novel AB(4)-type superlattice structure are proposed as potential anode materials for Ni/MH batteries. The formation of the AB(4)-type phase during annealing and its effect on electrochemical characteristics are studied. The presence of the AB(4)-type phase leads to a higher discharge capacity at both low and high rates, as well as improved cycling stability and tolerance at low temperatures.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Energy & Fuels
Michael Lutz, Matthias Schmidt, Inga Buerger, Marc Linder
Summary: This research conducts a fundamental analysis of a novel thermochemical system, revealing the technical potential of metal hydrides as energy storage components and indicating the relationship between higher pressure ratio, increased storage density, and decreased efficiency.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Materials Science, Multidisciplinary
Xiao-Sheng Liu, Hai-Zhen Liu, Ning Qiu, Yan-Bing Zhang, Guang-Yao Zhao, Li Xu, Zhi-Qiang Lan, Jin Guo
Summary: In this study, NbF5 was successfully used to improve the cycling properties of MgH2-AlH3 composite, leading to a stable hydrogen desorption capacity during cycling. The addition of NbF5 is able to reduce pulverization of the composite during cycling, enhancing the material's stability.
Article
Green & Sustainable Science & Technology
Zexuan Wang, Zhihui Tian, Pufan Yao, Huimin Zhao, Chaoqun Xia, Tai Yang
Summary: Nickel phosphide (Ni2P) is synthesized and introduced into magnesium hydride (MgH2) to enhance the hydrogen storage performance. The addition of Ni2P decreases the dehydrogenation temperature of MgH2 and improves the hydrogen absorption and desorption kinetics of the composites.
Article
Engineering, Environmental
Jinchi Li, Shuqi Yu, Ding Zhu, Wanhai Zhou, Jian He, Liang Zeng, Shiqi Chen, Bihua Ma, Haonan Xi, Chaoling Wu, Wanglai Cen, Yao Wang, Yungui Chen
Summary: A nano carbon layer was successfully coated on the surface of AB5-type hydrogen storage alloy, resulting in exceptional electrochemical properties such as peak power, high-rate discharge capability, low-temperature performance, and cycling stability. The carbon coating enhanced surface conductivity and reduced alloy oxidation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Shaoyang Shen, Liuzhang Ouyang, Jiangwen Liu, Hui Wang, Xu-Sheng Yang, Min Zhu
Summary: A one-step high-energy ball milling process is used to in situ form ultrafine Ni nanoparticles and combine them with expanded graphite to synthesize a MgH2Ni-EG nanocomposite. The nanocomposite exhibits excellent hydrogen storage performance at both high and room temperatures.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Wanting Sun, Jiasi Luo, Yim Ying Chan, J. H. Luan, Xu-Sheng Yang
Summary: In this study, a laser surface remelting technique was used to fabricate a heterogeneous gradient nanostructured layer on an austenitic Hadfield manganese steel. The layer exhibited a gradient refinement process and had a core-shell structure with ultra-strong mechanical properties due to the extra work hardening ability induced by the strength-ductility synergy in the gradient nanostructure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ziquan Li, Jinquan Wen, Yuqing Cai, Fengting Lv, Xu Zeng, Qian Liu, Titus Masese, Chuanxiang Zhang, Xusheng Yang, Yanwen Ma, Haijiao Zhang, Zhen-Dong Huang
Summary: A new Bi-Ti-EG compound is reported as a high-capacity and stable anode material for potassium storage. It possesses a long-range disordered layered framework that can facilitate electrolyte ingress into Bi nanoparticles, thereby enhancing the storage capacity and cycling stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Physical
Yongyang Zhu, Jianding Li, Limei Yang, Xu-Sheng Yang, Qing Zhou, Renheng Tang, Shaoyang Shen, Liuzhang Ouyang
Summary: Metal borohydrides have high hydrogen storage capacities and are extensively studied. However, developing a low-cost and high-efficiency closed loop of hydrolysis and regeneration is challenging. This work provides an overview of the latest advances in hydrolysis and regeneration processes of Li(Na)BH4 and Mg(BH4)2, with a focus on NaBH4 hydrolysis and regeneration. The development of catalysts, synthesis techniques, and reducing agents for NaBH4 regeneration are discussed. The use of low-cost transition metal-based catalysts has shown great potential for catalyzing the hydrolysis reaction.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
De-Xin Zhu, Kun-Ming Pan, Yuan Wu, Xiao-Ye Zhou, Xiang-Yue Li, Yong-Peng Ren, Sai-Ru Shi, Hua Yu, Shi-Zhong Wei, Hong-Hui Wu, Xu-Sheng Yang
Summary: In this study, the dominant factors influencing the bulk modulus of intermetallic compounds were identified as B-cal, dB(avg), and TIE. Surrogate machine learning models using these features achieved a 95% accuracy in predicting bulk modulus. Symbolic regression provided an expression for the relationship between bulk modulus and the screened features. These findings offer a new approach for optimizing and predicting the bulk moduli of intermetallic compounds.
Article
Metallurgy & Metallurgical Engineering
Rongjian Shi, Yanqi Tu, Liang Yang, Saiyu Liu, Shani Yang, Kewei Gao, Xu-Sheng Yang, Xiaolu Pang
Summary: This study explored the influence of pre-strain and microstructures on the hydrogen trapping behaviors in 1-GPa high-strength martensitic steel. The results showed that the trapped reversible and trapped irreversible hydrogen contents significantly increased after a pre-strain of 5%. The microstructural evolution revealed that the presence of concomitant dislocation cell-twin duplex microstructure and tangled dislocations contributed to the enhanced hydrogen trapping.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yongyang Zhu, Shaoyang Shen, Xu-Sheng Yang, Liming Zeng, Gary Tsui, Zheng-Long Xu, Qing Zhou, Renheng Tang, K. C. Chan
Summary: This study proposes a cost-effective method to regenerate LiBH4 by ball milling hydrous lithium metaborate with low-cost Mg-based alloys. The introduction of light rare-earth metals into Mg improves the regeneration kinetics of LiBH4 by facilitating the breakage of B-O and conversion of H+ into H-. A yield of 40% can be achieved for LiBO2 center dot 2H(2)O-CeMg12 system with a relatively short ball milling duration of 10 hours. The optimized regeneration of LiBH4 is believed to be efficient and economical, utilizing an intrinsic hydrogen source in LiBO2 center dot 2H(2)O and cheap reducing agents. This finding is expected to promote the widespread use of LiBH4 for hydrogen storage.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Xinping Mao
Summary: The austenite to ferrite phase transformation is a crucial structural change in steel production, with the ferrite morphology and grain size significantly impacting the mechanical properties of steel materials. This study investigates the effects of cooling rate, prior austenite grain size (PAGS), and Mn content on the microstructure evolution of the austenite-to-polygonal ferrite phase transformation using a multi-phase-field model. The findings reveal that higher cooling rates enhance the driving force for the phase transformation and delay the process. Decreasing PAGS increases the proportion of austenite grain boundaries, providing more nucleation sites for polygonal ferrite and resulting in refined grain size. Furthermore, increased Mn content leads to significant grain refinement by reducing the transformation temperature. This work provides valuable insights for adjusting and designing desired microstructures of polygonal ferrite to enhance the mechanical performance of steel.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Yuqing Cai, Wenjing Liu, Fangfei Chang, Su Jin, Xusheng Yang, Chuanxiang Zhang, Ling Bai, Titus Masese, Ziquan Li, Zhen-Dong Huang
Summary: In this study, Ni, Fe, Mg, and Ti elements were introduced into Mn-based layered oxide to design a high-entropy compound HE-KMO, which demonstrated exceptional rate capability and cyclic stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ling Wang, Dongxuan Li, Yawen Huang, Ruiqi Mao, Boqing Zhang, Fengxiong Luo, Peiyang Gu, Ping Song, Xiang Ge, Jian Lu, Xusheng Yang, Yujiang Fan, Xingdong Zhang, Kefeng Wang
Summary: In this study, enhanced in situ mineralization through the combination of enzymatic and anion-boosted mineralization is applied, resulting in improved mineralization efficiency, mineral content, and mechanical properties. The mechanism of mineralization enhancement is investigated through computational calculations and in vitro mineralization experiments. The strategy is shown to have potential applications in cranial bone repair.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Haoling Huo, Lin Cao, Jie Li, Huaijun Lin, Qiwei Wang, Xusheng Yang, Chuanjun Zang, Jingtao Zhang, Peng Zhang, Wei Li
Summary: In this study, modified coatings with PEEK and nanoparticles were utilized to enhance the strength and wear resistance. The addition of tantalum carbide nanoparticles showed the greatest improvement in mechanical behavior and wear resistance. The modified coatings have the potential to reduce stress on the titanium implant substrate and extend the lifespan of total knee replacement implants.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Shaojie Lv, Hong-Hui Wu, Kaiyang Wang, Chaolei Zhang, Jiaming Zhu, Shuize Wang, Guilin Wu, Junheng Gao, Xu-Sheng Yang, Xinping Mao
Summary: In this study, the austenitic-pearlite transformation and its effects on microstructure evolution were investigated using a CALPHAD-based model. The results showed that the isothermal transformation temperature, cooling rate, and Mn content significantly influenced the pearlite transformation process, and the multi-component diffusion played a critical role in pearlite growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Kashif Naseem, Hao Zhong, Wenbin Jiang, Mili Liu, Chengguang Lang, Kang Chen, Liuzhang Ouyang, Jianmei Huang
Summary: In this study, a low-cost Mo2C catalyst was ball milled with Mg to produce a Mg-Mo2C composite, which exhibited rapid hydrolysis in seawater, generating over 851 mL g(-1) hydrogen in 10 min. The Mo2C maintained a high catalytic activity after recycling, and a hydrogen yield of over 90% after five cycles. The study also revealed that the micro galvanic cell and well-combined Mg-Mo2C interface formed during ball milling significantly enhanced the hydrolysis performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Yanyu Chen, Jie Li, Yingfei Yang, Junjie Yang, Huaijun Lin, Qiwei Wang, Xusheng Yang, Yuying Meng, Wei Li, Zhidan Lin, Peng Zhang
Summary: A novel porous polymer was prepared using the Pickering high internal phase emulsion (HIPE) template method for efficient oil-water separation from sewage. The addition of OTS-modified carbon nanotubes and surfactants improved the stability, mechanical properties, and separation efficiency of the polyHIPE. The 1%OTS-CNT polyHIPE exhibited high oil absorption capacity and maintained absorption efficiency even after multiple reapplications. Furthermore, the polymer showed superior antibacterial properties against E. coli and S. aureus.
Article
Engineering, Environmental
Yongyang Zhu, Xubo Li, Xu-Sheng Yang, Pengyun Chen, Gary Chi-Pong Tsui, Zheng-Long Xu, Renheng Tang, Fangming Xiao, Kangcheung Chan
Summary: Researchers have developed a low-cost BCC solid solution alloy with excellent activation performance and high effective hydrogen desorption capacity by using a new compositionally complex doping strategy. The synergistic effect of Nb, Fe, Co, Ni, and Mn elements has been confirmed to improve hydrogen storage performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
