Article
Materials Science, Multidisciplinary
Y. Janu, D. Chaudhary, N. Singhal, V. S. Chauhan, C. L. Balwa, L. Saini, M. K. Patra
Summary: W-type barium cobalt hexaferrites substituted with different concentrations of Mn2+ and Zn2+ ions in Ba(MnZn)(x)Co-2 ((1-x)) F16O27 were prepared by a simple solid state process, showing systematic incorporation of ions into the lattice and enhanced magnetic properties. The composites with higher ferrite content displayed excellent microwave absorption properties, with potential applications in wide band frequency absorbers.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Yuelei Pan, Qianqian Zhu, Jiahui Zhu, Yuhang Cheng, Bowen Yu, Zirui Jia, Guanglei Wu
Summary: Six different morphologies of N-Ni/C nanostructures were prepared by one-step hydrothermal method and high temperature carbonization by adjusting the types of nickel salts and reaction solvents. The electromagnetic wave absorption performance of these nanostructures was compared and analyzed. Among them, the nanoflower-like N-Ni/C composite exhibited excellent dielectric loss and magnetic loss synergistic effect, leading to superior electromagnetic wave absorption properties. The minimum reflection loss value at a thickness of 1.9 mm was -59.56 dB at 16.88 GHz, and the effective absorption bandwidth value reached 6.0 GHz at a thickness of 2.2 mm. The research findings highlight the significant influence of different morphologies and multiple lattice structures on electromagnetic wave absorption performance, providing new research ideas for the development of high-performance absorbing materials.
Article
Chemistry, Physical
Shaoxiang Cai, He Han, Zhichao Lou, Han Yan, Qiuyi Wang, Ru Li, Jingquan Han, Yanjun Li
Summary: In response to increasing electromagnetic radiation pollution, novel functional materials are being used in home decoration. Heterostructure carbon materials were prepared by modifying cellulose-derived graphite-like sheets with lignin-derived carbon particles. Among these materials, BC-8 showed strong electromagnetic wave absorption performance and a wide absorption bandwidth. When applied to bamboo surfaces, the coating exhibited high electromagnetic energy attenuation while maintaining mechanical properties, making it suitable for biomass-based home decoration. The excellent attenuation performance was attributed to good impedance matching, dielectric and conductive losses, and elongated electromagnetic wave propagation.
APPLIED SURFACE SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Mingrui Han, Yunfei Yang, Wei Liu, Zhihui Zeng, Jiurong Liu
Summary: This article discusses the application of carbon-based electromagnetic wave absorbing materials in solving electromagnetic wave pollution. By designing a three-dimensional porous structure, the absorption effect of the material is improved. The researchers summarize the latest research progress and propose future challenges and prospects.
SCIENCE CHINA-MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhi Zhang, Yao Yao, Junnan Zhang, Yao Ma, Peng Xu, Pin Zhang, Zhiqian Yang, Wenke Zhou
Summary: Two-dimensional hybrid halide perovskites show great potential for electromagnetic wave absorption due to their high equilibrium electron hole and electron mobility, as well as enhanced water-resistance and photo-stability. In this study, a (PEA)(2)PbBr4/CNTs wave-absorption system was designed and the 2D perovskite-based composite demonstrated excellent wave-absorbing performance. The outstanding performance is attributed to multiple loss mechanisms, indicating the great potential of 2D perovskite for EMW absorption applications.
Article
Chemistry, Physical
Longfei Lyu, Sinan Zheng, Fenglong Wang, Yue Liu, Jiurong Liu
Summary: By matching melamine foam with ZIF-67, the density of composite materials can be reduced and the absorption capability of electromagnetic waves can be improved.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Xueting Li, Wangwang Lei, Jian Wei, Yanbin Zhang, Zongmo Shi
Summary: In this study, lightweight porous SiC/Si3N4 composite nanowires with excellent performance of broadband electromagnetic wave absorption were successfully prepared. These nanowires can be used as lightweight electromagnetic wave absorbers in high-temperature environments.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Saeed Zolfaghary Pour, Ebrahim Chegini, Mojtaba Mighani
Summary: A broadband metamaterial absorber, fabricated using 3D printing technology, is designed for operation in the X-band. It can absorb more than 90% of incoming waves in the frequency range of 7.1 to 13.8 GHz. The absorber is based on an infinite array of conductive ribbons, with a thickness of only 0.1 lambda at the minimum frequency. A circuit model and transmission line theory are used to explain the absorption principle. The design method is flexible and can be applied to other frequency bands. The absorber can be used in various applications such as communication, electromagnetic shielding, radar, and satellite, and is also suitable for flexible applications in the X-band.
IET MICROWAVES ANTENNAS & PROPAGATION
(2023)
Article
Materials Science, Ceramics
Zihan Zhang, Genyu Zhang, Liuming Lei, Hudie Yuan, Yanli Nan, Yun Zhou
Summary: The design of cost-effective and eco-friendly electromagnetic absorbing materials is crucial for their practical applications. This study demonstrates the production of Fe nanoparticles wrapped in carbon nanohorn microspheres enriched with N, which exhibit excellent electromagnetic wave absorption properties.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Zirui Jia, Xiaoyi Zhang, Zheng Gu, Guanglei Wu
Summary: Ni-Co/PC composite is prepared by introducing metal Co element with Ni-MOF/PC as precursor. Then a series of Ni-Co bimetal/PC composites are prepared by polyaniline coating, oxidation reaction, and vulcanization reaction. It is found that vulcanization reaction was the best path for the electromagnetic wave absorption performance of the product. The minimum reflection loss (RLmin) of NiCo2S4/PC composite reaches - 67.81 dB at the sample thickness of 2.6 mm, and the maximum effective absorption bandwidth (EAB) reaches 6.16 GHz when the sample thickness is 2.1 mm. NiCo2S4/PC composite is an ideal electromagnetic wave absorber due to its excellent electrical conductivity, rich surface, and high attenuation capability.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Engineering, Environmental
Zhichao Lou, Qiuyi Wang, Wei Sun, Jie Liu, Han Yan, He Han, Huiyang Bian, Yanjun Li
Summary: The study focuses on using bamboo as biomass material to prepare a series of magnetic biochar by regulating the chemical components through delignification. It was found that the lignin content directly affects the absorption efficiency of Fe2+/Fe3+ cations, influencing the loading amount of magnetic phase and the graphitization degree of biochar after carbonization. The formed Fe3C/biochar composites from delignified bamboo exhibit excellent electromagnetic wave absorption capacities.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xiaoyan Yuan, Aiming Sha, Shengyan Huang, Hui Zhao, Xu Chen, Yi Zhang, Shouwu Guo
Summary: BNNS-CNFs have lightweight and wide-band characteristics at low load content, making them suitable for high-efficiency electromagnetic wave absorption.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Composites
Yuksel Akinay, Bektas Colak, Muhammet Emre Turan, Ihsan Nuri Akkus, Hilal Celik Kazici, Abdullah Oguz Kizilcay
Summary: The study investigated the electromagnetic wave absorption properties of glass fiber/epoxy composite materials filled with nanoparticles doped mica pigments, showing that Sb2O3:SnO2/mica particles exhibit superior absorption performance. This composite material has potential applications as an electromagnetic wave absorber due to its high complex permittivity and low reflection loss values.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
Zhi Zhang, Yilu Xia, Yao Yao, Fan Wu, Zhongwei Zhang, Zhiqian Yang, Shuo Wang, Pin Zhang, Wenke Zhou
Summary: The MoO3@Fe-2(MoO4)(3)/rGO composite material was studied for its chemical composition, micromorphology, and absorption performance. The optimal composite showed minimal reflection loss at 14.4 GHz and an effective absorption bandwidth of 5.8 GHz.
Article
Chemistry, Physical
Xiaoyi Zhang, Zirui Jia, Feng Zhang, Zihao Xia, Jiaxiao Zou, Zheng Gu, Guanglei Wu
Summary: In this paper, NiFe2S4/PC composites, an electromagnetic wave absorbing material with excellent performance, is prepared by introducing Ni-MOF, Fe, and S elements into a porous carbon framework. The material exhibits a low reflection loss, thin matching thickness, and wide effective absorption bandwidth.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yanqing Wang, Jinying Wang, Shingo Morimoto, Gan Jet Hong Melvin, Ruiqi Zhao, Yoshio Hashimoto, Mauricio Terrones
Article
Chemistry, Physical
Zhipeng Wang, Yipei Li, Jian Liu, Gui Tian, Gang Liu, Mingxi Wang, Hironori Ogata, Wei Gong, Adavan Kiliyankil Vipin, Gan Jet Hong Melvin, Josue Ortiz-Medina, Shingo Morimoto, Yoshio Hashimoto, Mauricio Terrones, Morinobu Endo
Summary: The vertical graphene films fabricated on nickel foil from fullerene soot under microwave plasma irradiation exhibit high purity and graphitization order, making this technique an effective method for synthesizing vertically oriented graphene sheets from various carbon-containing sources.
Article
Materials Science, Multidisciplinary
Wong Min Jin Karen, J. H. Wong, Zhipeng Wang, Nancy J. Siambun, Willey Y. H. Liew, W. K. Muzammil, K. Sopian, G. J. H. Melvin
Summary: This study demonstrated the preparation of highly dispersive carbonized sawdust through surface functionalization using a mild hydrothermal treatment. The optimal process parameters were determined through dispersion, morphological and purity analyses. The modified carbonized sawdust showed good dispersion in ethanol and successful surface functionalization with various oxygen based functional groups attached.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Review
Chemistry, Physical
Hooi Peng Lim, Willey Yun Hsien Liew, Gan Jet Hong Melvin, Zhong-Tao Jiang
Summary: This paper reviews the phase structures and oxidation kinetics of complex Ti-Al alloys at oxidation temperatures in the range of 600-1000 degrees C. The effects of alloying elements on the oxidation resistance and mechanical properties of Ti-Al alloys have been discussed, showing significant improvement in mechanical properties through element additions.
Article
Environmental Sciences
Wong Min Jin Karen, C. Y. Wong, Zhipeng Wang, Willey Y. H. Liew, G. J. H. Melvin
Summary: This study successfully generated clean water from seawater using carbonized rice husk coated melamine sponge as a solar absorber. The efficient heat absorption and seawater transportation properties of carbonized rice husk and melamine sponge contributed to the high performance of the system. Under direct solar radiation, clean water could be continuously produced for about 4 hours, with salinity and pH values meeting the standards for drinkable water.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Wong Min Jin Karen, Zhipeng Wang, Willey Y. H. Liew, G. J. H. Melvin
Summary: A low cost and feasible fabrication method for a novel photothermal conversion material and solar absorber was developed and applied in solar driven vapor generation and seawater desalination. The experimental results showed that the solar absorber had high efficiency and evaporation rate, and could effectively reduce the salinity of seawater and maintain a suitable pH value.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
An Hongen, Nancy Julius Siambun, Bih-Lii Chuab, Melvin Gan Jet Hong, Li Hongtao
Summary: In this study, a Cu55Ni45 alloy was used as the experimental alloy system, and the method of obtaining deep undercooling of the alloy melt was systematically investigated. The combination of molten glass purification and cyclic overheating successfully achieved stable deep undercooling of the alloy melt. The nucleation and growth mechanism of undercooled melt were analyzed, along with the microstructure evolution and grain refinement mechanism of the alloy in a wide undercooling range. The grain refinement solidification structure under large undercooling was further examined using EBSD technology, confirming that the grain refinement was caused by recrystallization as shown in the metallographic pictures.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2021)
Article
Materials Science, Multidisciplinary
Li Hongtao, Nancy Julius Siambun, Bih-Lii Chuab, Melvin Gan Jet Hong, An Hongen
Summary: The solidification microstructures of undercooled Ni90Cu10 alloys were studied under different undercoolings, revealing two types of grain refinement structures depending on the degree of undercooling. In-depth analysis using electronic backscattering diffraction technique showed that dendrite remelting is prominent in grain refinement at low undercooling, while the presence of annealing twins and grain boundary migration indicate the occurrence of recrystallization process at high undercooling.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2021)
Review
Materials Science, Multidisciplinary
Willey Yun Hsien Liew, Hooi Peng Lim, Gan Jet Hong Melvin, Jedol Dayou, Zhong-Tao Jiang
Summary: This paper reviews the degradation issues of metallic coatings due to oxidation and thermal softening at high temperatures in tribological applications. The focus is on the development of durable hard coatings through the alloying of ternary TiAlN coatings with various elements. The properties and effects of deposition parameters, chemical composition, high-temperature annealing, and coating architecture on the coating properties are discussed, providing insights into the challenges and future research perspectives of the reviewed coatings.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Environmental Sciences
Wong Min Jin Karen, Zhipeng Wang, Willey Y. H. Liew, G. J. H. Melvin
Summary: Solar vapor generation using carbonized sawdust (CSD) coated cotton towel as the solar absorber (SA) is effective for seawater desalination. The best-performing SA with 60 wt% CSD showed an average efficiency of 63.41 +/- 1.31% and an average evaporation rate of about 1.15 kg/m(2) h. The collected clean water had a salinity of 120 ppm and a pH of 7.22, meeting the World Health Organization safe water limit standard.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Engineering, Electrical & Electronic
Jin Hoong Wong, Wong Min Jin Karen, Saffuan Awg Bahrin, Bih Lii Chua, Gan Jet Hong Melvin, Nancy Julius Siambun
Summary: A comparative study was conducted on shredder blades with different geometries and orientations, finding that the combination of double-edge blades with spiral orientation showed the best performance in terms of recycling efficiency and shredding efficiency.
Article
Engineering, Mechanical
Wong Min Jin Karen, J. X. Ooi, Zhipeng Wang, Nancy J. Siambun, Willey Y. H. Liew, W. K. Muzammil, K. Sopian, G. J. H. Melvin
Summary: The study explores the carbonization process of rice husk to produce alternative carbon material. Through mild hydrothermal treatment using potassium hydroxide (KOH) and potassium persulfate (KPS), the carbonized rice husks showed improved dispersion in polar solvents and introduced functional groups like hydroxyl and carboxyl. The modified rice husks did not exhibit any structural defects and displayed higher oxygen content in EDX analysis.
INTERNATIONAL JOURNAL OF SURFACE SCIENCE AND ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Gan Jet Hong Melvin, Zhipeng Wang, Qing-Qing Ni
Article
Multidisciplinary Sciences
Gan Jet Hong Melvin, Zhipeng Wang, Shingo Morimoto, Masatsugu Fujishige, Kenji Takeuchi, Yoshio Hashimoto, Morinobu Endo
Proceedings Paper
Energy & Fuels
G. J. H. Melvin, Z. Wang, N. J. Siambun, M. M. Rahman
INTERNATIONAL CONFERENCE ON MATERIALS TECHNOLOGY AND ENERGY (ICMTE)
(2017)
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)