Article
Chemistry, Multidisciplinary
R. G. Cao, W. Liu, P. Ji, S. J. Zhan, X. B. Zhang, H. L. Su
Summary: Magnetic alloy/ferrite/nitrogen-doped carbon composites were synthesized by controlled carbothermal reduction. The properties of the composites were influenced by the dosage of dopamine hydrochloride. The research provides new insights into the design of multi-component magnetic materials and their microwave absorption properties.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Shujie Liu, Pengfei Yin, Limin Zhang, Yi Zhang, Kaiming Wang, Yongxin Zhan
Summary: The hierarchical carbon/CoFe2O4/Co3Fe7 composites were prepared using a innovative technique, and they showed excellent attenuation properties for absorbing incident electromagnetic wave.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Yue Yuan, Shicheng Wei, Yi Liang, Bo Wang, Yujiang Wang, Wei Xin, Xinlei Wang, Yu Zhang
Summary: The cobalt ferrite/carbon nanotubes nanocomposite absorber materials synthesized by a solvothermal method demonstrate excellent absorption properties and a wide absorption bandwidth, making them suitable for microwave absorbers in various technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yue-Yi Wang, Song-Yang, Wen-Jin Sun, Kun Dai, Ding-Xiang Yan, Zhong-Ming Li
Summary: Barium ferrite (BaFe12O19) is a potential microwave absorption material, but the performance is limited by the poor dispersion of carbon nanotubes (CNTs) in the composites prepared by ball-milling method. In this study, CNTs were uniformly introduced into the precursor of BaFe12O19 during the auto-ignition process and calcined under different atmospheres. The resulting CNT/BaFe12O19 composites exhibited significantly improved microwave absorption performance compared to pure BaFe12O19 and CNT/BaFe12O19 composites prepared by ball-milling method.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Jiali Song, Yu Gao, Guoguo Tan, Qikui Man, Zhi Wang
Summary: In this study, spinel Ni-Zn ferrites with excellent microwave absorption properties were synthesized and their absorption characteristics and interaction mechanisms were investigated. The results showed that S-NZFO had a wide effective absorption bandwidth and high saturation magnetization, while H-NZFO had small particle size and high complex permittivity. Both materials demonstrated potential as efficient microwave absorbers in military and civilian applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jiayao Wang, Yiqun Wang, Rui Jiang, Shanshan Chen, Qinchuan He, Guanglei Wu
Summary: Three-dimensional ZnOCo@C with submillimeter porous structure was prepared by one-step thermal expansion of MOFs. The material showed a wide effective absorption band and low reflection loss, indicating its potential as an electromagnetic wave absorption material. This work provides a novel idea for the structural design and composition adjustment of MOFs-based EMW absorbing materials.
MATERIALS TODAY PHYSICS
(2023)
Article
Engineering, Environmental
Xiaojun Chen, Mingzhe Yang, Xusheng Zhao, Dechao Hu, Wei Liu, Wenshi Ma
Summary: This study utilized cerium ferrite nanoparticles and multi-walled carbon nanotubes to prepare a novel CeFe2O4/MWCNTs microwave absorber nanocomposite, achieving outstanding superhydrophobicity through the addition of polydimethylsiloxane. The nanocomposite exhibited favorable thermal stability, improved impedance matching, and excellent electromagnetic wave absorption performance, with a maximum reflective loss of -47 dB at 11.3 GHz.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Muhammad Adnan Aslam, Kang Hu, Wei Ding, Ali Hassan, Yuecheng Bian, Kang Qiu, Qiangchun Liu, Zhigao Sheng
Summary: By changing the dimensionality of bio-carbon materials, the microwave absorption properties of ferrite/carbon composites can be effectively improved, with the minimum reflection loss enhanced from -9 dB to -45 dB. Adjusting the thickness of ZFO/3D-bio-carbon samples allows for a wide absorption range from 4 to 18 GHz, with an effective absorption bandwidth up to 7.1 GHz covering the entire Ku band.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Qihua Liang, Zhaofei Tong, Jinxiang Guo, Man Wang, Qingrong Yao, Huaiying Zhou
Summary: Barium ferrite is a multiferroic material with excellent properties and can easily improve its performance through doping. By replacing Ba ions with Nd ions, the magnetic performance of the material is enhanced, leading to improved microwave absorption characteristics and a wider range of applications. When the doping content reaches 0.10, the material shows optimal performance with maximum saturation magnetization, coercive force, and microwave absorption properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Engineering, Environmental
Pengfei Yin, Guanglei Wu, Yuting Tang, Shujie Liu, Yi Zhang, Guixian Bu, Jianwu Dai, Yongpeng Zhao, Yaowen Liu
Summary: In this study, a novel composite material was synthesized using a unique method, which showed excellent performance in absorbing microwave radiation, with a broad absorption bandwidth and appropriate absorption intensity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Mu Zhang, Le Chen, Yang Yu, Xianfeng Meng, Jun Xiang
Summary: In this study, carbon nanofiber supported cobalt ferrite composites (C/CFO) were prepared using electrospinning and hydrothermal methods, displaying excellent microwave absorption properties due to their unique 3D network structure, composite composition, and synergistic effect between C NFs and CFO NPs. With 10 wt % of CFO NPs, the C/CFO samples exhibited superior RLmax of -137 dB at 11.36 GHz and EAB (RL < -10 dB) of 11.44 GHz (6.59 GHz-18 GHz), surpassing single component absorbents, showing great potential for military and civilian applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Xinting Chen, Yue Wu, Weihua Gu, Ming Zhou, Shaolong Tang, Jieming Cao, Zhongqiu Zou, Guangbin Ji
Summary: This review discusses the characteristics and principles of microwave absorbing materials, with a focus on the research progress in nanostructure design and composition regulation of carbon spheres. The clever nanostructure design and synergistic effect among different components enable carbon spheres and their composites to exhibit superior microwave absorption performance.
Article
Materials Science, Composites
Yuanchun Zhang, Shengtao Gao, Yan Wang
Summary: In this study, a Ni@C octahedron composite was synthesized via a solvothermal reaction and annealing treatment, and it showed adjustable electromagnetic parameters and absorption properties.
COMPOSITES COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ruiwen Shu, Yue Wu, Xiaohui Li, Ningning Li, Jianjun Shi
Summary: In this study, nitrogen-doped cobalt iron alloy@carbon-carbon nanotubes (CoFe alloy@C-CNTs) composites were fabricated using an aging and pyrolysis two-step method. The composites exhibited a unique four-pointed star morphology with CoFe alloy nanoparticles uniformly embedded in the porous carbon matrix. The microwave absorption properties of the composites were significantly influenced by the pyrolysis temperature, and the composite treated at 700.0 degrees C showed the best absorption performance. The possible electromagnetic attenuation loss mechanisms of the composites were also elucidated.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Guojuan Ma, Pengfei Yin, Limin Zhang, Houhui Huang, Xiyuan Sun, Yi Zhang, Jian Wang, Xing Feng
Summary: A group of BPC-CoFe2O4/CoFe@C composites were obtained by regulating bio-based porous carbon with solvothermal loading of magnetic particles and subsequent annealing treatment for the purpose of defusing low-frequency microwave radiation contamination. The investigation reveals that the technical parameters significantly affect the microwave absorption mechanism of the prepared absorbents. The composite material APC-700 exhibits excellent impedance matching characteristic within a wide low-frequency range and shows great potential for solving low-frequency radiation contamination.
Article
Materials Science, Ceramics
Pengfei Yin, Limin Zhang, Jian Wang, Xing Feng, Yi Zhang, Jianwu Dai, Junchi Liu
Summary: By adjusting the microstructure of composites, the absorption capacity of microwave radiation can be effectively enhanced, leading to a wider absorption band. In this study, a (Ni/NiO)@C composite with radial structure was obtained through co-hydrothermal and annealing methods, demonstrating the importance of regulating the microstructure for microwave absorption.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xiyuan Sun, Jian Wang, Pengfei Yin, Yi Zhang, Kaiming Wang, Gang Jiang
Summary: The adsorption and dissociation behaviors of H2O on Co5M clusters were investigated, and it was found that doping heteroatoms can enhance the adsorption strength and decrease the dissociation barriers, thus optimizing the catalytic activity.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Food Science & Technology
Jian-Wu Dai, Qi-Qi Fu, Ming Li, Lian-Jie Li, Kai-Yun Gou, Jian-Kang Zhou, Yao-Wen Liu, Wen Qin, Peng-Fei Yin, Ying-Lu Li, Li-Jia Xu
Summary: This research studied the effects of microwave vacuum drying (MVD) on the drying characteristics and comprehensive quality of papaya slices. The results showed that microwave power density, vacuum degree, and drying temperature were the main factors affecting the comprehensive score of papaya slices. Increasing slice thickness led to increased fragility and hardness of the slices. The optimal technologic parameters were determined to be microwave power density of 10 W/g, vacuum degree of -90 kPa, drying temperature of 54.58 degrees C, and slice thickness of 6 mm, resulting in papaya slices with a maximum comprehensive score of 8.80 and noticeable pore structure and crispness.
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2022)
Article
Spectroscopy
Cuiping Zhou, Yi Zhang, Jiajie Zhu, Xuefei Ren, Yingjie Zhu, Pengfei Yin, Liang Zhao, Jian Wang, Xing Feng
Summary: A new perovskite BaLaMgTaO6:Mn4+ red phosphor was synthesized for the first time via the high-temperature solid-state method. The doping of Bi3+ and Ca2+ ions in the phosphor led to a significant enhancement in luminescence emission intensity, showing potential for agricultural lighting applications. The optimized phosphor exhibited high quantum efficiency and color purity, making it suitable for warm white light emission in agricultural cultivations.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Jian Wang, Pengfei Yin, Junchi Liu, Tao Zhang, Shusheng Wang, Lei Liu
Summary: In this study, A4 typing paper was used to manufacture FeNi3 and NiCx coated carbon skeleton with outstanding multiband absorption ability. The product shows great potential for multiband absorption of electromagnetic waves.
Article
Chemistry, Physical
Lijia Xu, Zhicheng Lin, Yanjun Chen, Zeng Fan, Xinrui Pei, Song Yang, Xin Kou, Yuchao Wang, Zhiyong Zou, Ding Xi, Pengfei Yin, Gehong Su, Man Zhou, Jianwu Dai, Lujun Pan, Yongpeng Zhao
Summary: The design of lightweight and efficient electromagnetic wave absorbing materials (EWAMs) is crucial for information security and target stealth. Hollow carbon-based confined structures have garnered attention due to their unique electromagnetic wave absorption characteristics. This paper reviews the recent progress on carbon-based hollow EWAMs, covering pure carbon materials, carbon-based composites, design strategies, synthetic methods, and the structure-function relationship of EWAMs. The challenges and prospects for practical applications of hollow carbon-based structures are also discussed.
Article
Engineering, Environmental
Chunhua Sun, Qingyu Li, Zirui Jia, Guanglei Wu, Pengfei Yin
Summary: This study demonstrates the optimized design of porous flower-like CZCT composites with strong absorption capability at a thinner thickness. It provides a simple strategy for constructing lightweight and adjustable MXene-based composites.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
Ming Chang, Zirui Jia, Guanglei Wu, Pengfei Yin
Summary: By designing the composition and structure of the 1D/2D Co/Co9S8/Ti3C2Tx composite, the electromagnetic responsiveness of the absorber can be modulated. Due to the unique structure and dielectric-magnetic synergistic loss, the composite exhibits an effective absorption bandwidth of 5.36 GHz at 2.1 mm and an RLmin value of -52.02 dB at 1.8 mm.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Pengfei Yin, Haitao Bai, Limin Zhang, Jian Wang, Xing Feng, Changfang Lu, Haipeng Hu, Houhui Huang
Summary: Currently, there is an urgent need for electromagnetic wave dissipating materials with high performance of broadband absorption to solve the increasing issues caused by electromagnetic radiation pollution and broadened radar detection bandwidth. In this study, CoFe/CoFe2O4/ZnO/rGO composites composed of hierarchical ZnO flakes with anchored CoFe/CoFe2O4 and rGO-doping were synthesized. It was found that the additive amount of raw GO can efficiently modulate the constituents and electromagnetic parameters of the absorbers. The investigation demonstrates that the specific CoFe/CoFe2O4/ZnO/rGO composite has the potential to be applied for broadband military radar stealth and serious electromagnetic radiation contamination.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Shujie Liu, Pengfei Yin, Limin Zhang, Yi Zhang, Kaiming Wang, Yongxin Zhan
Summary: The hierarchical carbon/CoFe2O4/Co3Fe7 composites were prepared using a innovative technique, and they showed excellent attenuation properties for absorbing incident electromagnetic wave.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Tao Zhang, Limin Zhang, Pengfei Yin, Yi Zhang, Xiyuan Sun, Jian Wang
Summary: In this study, a PANI-derived carbon block with flaky Fe3O4/FeS inserted was obtained through a facile route, which effectively combats excessive electromagnetic radiation. By changing the amount of iron oxide, the component and disordered structures in the carbon composites can be regulated, optimizing the impedance matching between free air and composites. Through the coupled effect of intrinsic polarizations, conductive dissipation, magnetic resonance, and eddy current wastage, the PDC/Fe3O4/FeS composite achieves efficient microwave absorption within a broad range of 6.55 GHz for only a 2.2 mm absorber thickness. This work provides a flexible strategy for synthesizing desired candidates for broadband electromagnetic protection.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jixi Zhou, Di Lan, Feng Zhang, Yuhang Cheng, Zirui Jia, Guanglei Wu, Pengfei Yin
Summary: Reasonable composition design and controllable structure are effective strategies for electromagnetic wave absorption of multi-component composites. The hybrid material with triple heterogeneous interface exhibits excellent absorption performance and corrosion resistance in simulated seawater.
Article
Chemistry, Multidisciplinary
Zehua Zhou, Xinfeng Zhou, Di Lan, Yan Zhang, Zirui Jia, Guanglei Wu, Pengfei Yin
Summary: This study improves the electromagnetic wave absorption performance and anticorrosion properties of layered double hydroxides (LDHs) by temperature control and composition design. Different regulation modes lead to different absorption mechanisms, optimizing the conductivity loss and interfacial polarization of LDHs.
Article
Materials Science, Multidisciplinary
Hao Yu, Xin Kou, Xueqing Zuo, Ding Xi, Haijun Guan, Pengfei Yin, Lijia Xu, Yongpeng Zhao
Summary: Metal-organic frameworks derived composites are promising EMW absorbers. Cation substitution can improve their absorption performance by regulating morphology and atomic space occupation. However, the mechanisms of how cation substitution affects EMW absorption performance are still not well understood. In this study, imidazolic MOFs were fabricated and tailored by cation substitution strategy to prepare porous composites. The samples showed optimal reflection loss and effective absorption bandwidth values under low filling rate and thin thickness conditions. The intercoupling between multiple atoms and the porous structure introduced by cation substitution contribute to the improved absorption performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
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)
