Review
Energy & Fuels
Nur Dina Zaulkiflee, Abdul Latif Ahmad, Siew Chun Low, Nishiyama Norikazu
Summary: This work reviews the use of 2D nanosheets in supercapacitor applications, focusing on different energy storage mechanisms and electrode materials. It discusses the challenges and future potential of using nanosheets to develop high-performance supercapacitors, providing a reference for future research in energy conversion, storage, and environmental protection.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Shivraj M. Mahadik, Nilesh R. Chodankar, Young-Kyu Han, Deepak P. Dubal, Sarita Patil
Summary: This review elaborates on the recent advances in the use of nickel cobaltite (NiCo2O4) as a potential positive electrode for hybrid supercapacitors (HSCs) to achieve high energy density without sacrificing power density and cycling stability.Introduction of structural benefits, charge storage mechanisms, and composites of NiCo2O4 with various materials helps in enhancing the electrochemical performance of HSCs. Key scientific challenges and perspectives for building high-performance HSCs for future applications are also discussed.
Article
Energy & Fuels
Mehmet Erman Mert
Summary: The study investigated the efficiency of hydrogen production by doping nickel foam precursors with nickel, cobalt particles, and decorating with silver nano-domes. The catalyst NF/NiCo-2/Ag showed the best performance in terms of lower hydrogen overpotential, higher HPE, stability, and response during the electrolysis process in 1 M KOH.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Xiangxiang Du, Xuejun Shi, Yanling Li, Kesheng Cao
Summary: The N, S-co-doped graphene hydrogel (N/SGH) was prepared using a hydrothermal approach with thiourea as a dopant, followed by the growth of polyaniline (PANI) on its surface. The resulting N/SGH electrode showed enhanced electrochemical performances, and further improvement was achieved by introducing PANI to the composite electrode, leading to high specific capacitance and stable cycle performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Geng Wei, Li Zhang, Jin Qian, Bo Yin, Xiaoming Zhang, Zhaomeng Wang, Haifu Huang, Shaolong Tang
Summary: Heteroatomic doping has a significant effect on improving the electrochemical energy storage of metal oxide electrode materials. In this study, Mo and S co-doped CoNiO2 material was successfully prepared and showed excellent supercapacitive properties and cycling stability. This co-doped material has the potential for application in supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Shama Islam, Poonam Sehrawat, Hana Khan, S. A. Hashmi, M. Zulfequar
Summary: High-performance symmetric supercapacitors were successfully fabricated using poly(o-toluidine) (POT)/multiwalled carbon nanotubes (MWCNTs) composite with sulfuric acid electrolyte. The nanocomposite demonstrated enhanced electrochemistry with a synergistic combination of MWCNTs charge storage and POT pseudocapacitance, offering specific energy and power densities of 19.6 Wh kg(-1) and 271 kW kg(-1) with excellent cyclability.
JOURNAL OF MATERIALS RESEARCH
(2021)
Review
Polymer Science
Farzana Hanif, Muhammad Imran, Yuang Zhang, Zhaoying Jia, Xiaohe Lu, Rongwen Lu, Bingtao Tang
Summary: This review article summarizes the recent developments in building form-stable phase change materials (PCMs) using wood as a supporting material. It also discusses the current technical problems and future research directions of wood-based PCMs, particularly the leakage problem during the phase change transition process.
Article
Chemistry, Multidisciplinary
Shengxian Hou, Xinyao Zhang, Pengfei Zhou, Shuhai Chen, Hongtao Lin, Jin Zhou, Shuping Zhuo, Yuying Liu
Summary: The study synthesized TDPP and TDPPA compounds and loaded them into graphene aerogels, forming composites of DPPs nanorods on a graphene network. The composite exhibits high reversible capacity and excellent performance in lithium-ion batteries, attributed to the conductive network of graphene and the combination of DPPs nanorods.
Review
Green & Sustainable Science & Technology
Tian Yue, Boxiong Shen, Pei Gao
Summary: Supercapacitors, a new type of energy storage device, have attracted widespread attention in the field of energy and the environment. Composites based on carbon material/MnO2 have become a hotspot in electrode materials for supercapacitors, and the introduction of a third material can further enhance the properties of the composites. This paper provides a review and analysis of binary and ternary composites of carbon material/MnO2 and their applications, highlighting the need for a superposition of different dimensions and an optimum capacitive balance index for excellent performance. The paper also predicts the future trend of biomass activated carbon/low-dimensional carbon material (1D,2D)/MnO2 and new technologies such as graft oxidation and 3D printing. Finally, the challenges and development trends of multi-composites based on carbon material/MnO2 are summarized and predicted.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Physical
Zhenyu Fu, Yanjing Wang, Yanbin Xu, Haifeng Li, Qingan Qiao, Ping Yin, Feng Wang, Xiaoling Guo, Zhenglong Yang
Summary: In this study, Ni3S2 materials were in-situ grown on nickel foam using the one-step reflux method, and a PPy conductive film was coated on the surface of Ni3S2 materials by electrodeposition to prepare self-supporting Ni3S2@PPy composites on nickel foam. The content of PPy on the surface of the Ni3S2 materials was controlled by adjusting the number of cyclic voltammetry cycles during the electro-deposition process. The Ni3S2@PPy composites exhibited excellent lithium storage performance when one cycle of cyclic voltammetry was applied. Coating with PPy significantly improved the decline of Ni3S2 electrode capacity after 50 cycles and enhanced the stability during later cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Agnieszka Gabryelczyk, Sudesh Yadav, Agnieszka Swiderska-Mocek, Ali Altaee, Grzegorz Lota
Summary: The study explores the use of common bio-wastes as materials for energy conversion and storage devices. Chicken eggshells were used as a precursor for electrode fillers in electrochemical capacitors and anode materials in Li-ion batteries. Different temperatures were used to obtain two groups of materials and their composition and properties were found to influence electrochemical performance. The results showed that the materials were suitable for both devices, with good capacitance and capacity retention.
Article
Materials Science, Multidisciplinary
Clarissa Abetz, Prokopios Georgopanos, Claudio Pistidda, Thomas Klassen, Volker Abetz
Summary: Hydrogen is crucial for the transition to a sustainable future without CO2 emissions. It can be produced from renewable energy sources like solar and wind power and used to buffer energy fluctuations in all sectors. Safe and efficient storage options, such as metal hydride materials, are essential for hydrogen technology implementation.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Multidisciplinary Sciences
J. C. Stinville, J. M. Hestroffer, M. A. Charpagne, A. T. Polonsky, M. P. Echlin, C. J. Torbet, V. Valle, K. E. Nygren, M. P. Miller, O. Klaas, A. Loghin, I. J. Beyerlein, T. M. Pollock
Summary: The development of high-fidelity mechanical property prediction models relies on large volumes of microstructural feature data. However, spatially correlated measurements of 3D microstructure and deformation fields have been rare. This study presents a unique multi-modal dataset that combines state-of-the-art experimental techniques for 3D tomography and high-resolution deformation field measurements.
Article
Materials Science, Ceramics
Ganesh Koyyada, Burragoni Sravanthi Goud, Mohamed Ouladsmane, Jae Hong Kim, Nam Hai Nguyen Thi, Nam Nguyen Dang
Summary: The demand for high-energy storage supercapacitors with appropriate designs has led to the development of g-C3N4/WO3(H2O)0.33 (GCN/WO) nanostructures, which have been prepared using a simple wet impregnation process. These nanostructures show improved electrochemical storage performance compared to their individual components, with increased specific capacitance and cyclic stability. The positive synergistic effect between GCN and WO in the nanostructures contributes to their enhanced electrochemical capacitor characteristics.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Chia-En Hsieh, Ching Chang, Shivam Gupta, Chung-Hsuan Hsiao, Chi-Young Lee, Nyan-Hwa Tai
Summary: This study demonstrates a novel fabrication method for supercapacitor electrodes composed of CoMn2O4 nanosheets coated onto carbon nanotubes grown on a stainless-steel mesh. By controlling the deposition time of the nanosheets, favorable morphology and excellent capacitance can be achieved. The material, which does not require binders or additives, exhibits high specific capacitance and is of significant importance for practical energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jyoti Yadav, M. D. Anoop, Rini Singh, Nisha Yadav, N. Srinivasa Rao, Fouran Singh, Ankur Jain, Takayuki Ichikawa, Kamlendra Awasthi, Manoj Kumar
Summary: In this study, precise and controlled tuning of strain in BiSbTe3 thin films was achieved by Fe ion implantation. The influence of Fe ions on the electronic band structure of BiSbTe3 and the tunability of Fermi level were confirmed by changes in resistivity. The observed reversible tuning of the Fermi level suggests potential device control applications.
Article
Chemistry, Physical
Kosuke Kajiwara, Hisashi Sugime, Suguru Noda, Nobuko Hanada
Summary: The MgH2-Nb2O5-carbon nanotube (CNT) composite was fabricated to accommodate volume changes during hydrogen storage cycles, leading to more stable hydrogen sorption properties. The addition of CNT resulted in greater cyclic stability compared to expanded graphite, possibly due to the higher C/Mg ratio on the surface of the MgH2-Nb2O5-CNT powder.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Natsuho Akagi, Keisuke Hori, Hisashi Sugime, Suguru Noda, Nobuko Hanada
Summary: This study systematically investigated anodic catalysts in the electrolysis of liquid ammonia, and observed a correlation between the formation enthalpy of metal nitrides and current density. Further investigation found that activity can be enhanced through microstructure control.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Qiu-Hui Zheng, Chuang Chen, Si-Min Cao, Meng-Ting Peng, Bao-Xia Dong, Yun-Lei Teng
Summary: In this study, a series of composite catalysts with uniform morphology and homogeneously distributed active sites were prepared through direct pyrolysis of a nitrogen-rich metal-organic framework and subsequent acid treatment. The acid leaching process resulted in removal of excess nanoparticles and increased exposure of active sites, leading to higher specific surface area. Fe-N-C-900 catalyst, derived from the nitrogen-rich precursor, exhibited the highest selectivity for CO product and excellent long-term stability.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Hiroyuki Gi, Yuki Kashiwara, Yuki Itoh, Khushbu Sharma, Norio Ogita, Hiroki Miyaoka, Tomofumi Ogawa, Marolop Simanullang, Laurent Prost, Takayuki Ichikawa
Summary: A systematic study was conducted on the cryogenic H2 adsorption properties below the critical point of H2 on various adsorbents, comparing the density of adsorbed H2 and its temperature dependence with liquid H2. While most studies focus on new porous materials for H2 storage, this study investigated the density of adsorbed H2 below the critical point for metal-organic frameworks, super-activated carbon, and graphene nanoplatelets. It was found that the adsorption of superdense H2 in a monolayer state had a much higher density than liquid H2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Jyoti Yadav, M. D. Anoop, Nisha Yadav, N. Srinivasa Rao, Fouran Singh, Takayuki Ichikawa, Ankur Jain, Kamlendra Awasthi, Rini Singh, Manoj Kumar
Summary: The effects of Ni7+ ion irradiation on Bi2Te3 thin films synthesized by e-beam evaporation were investigated. The films exhibited a polycrystalline rhombohedral structure. Irradiation caused a decrease in crystallite size and an increase in lattice strain. Raman spectra showed changes in A(1u)(1) modes with ion fluence. Surface roughness decreased due to the formation of nanocrystallites. XPS analysis confirmed the near stoichiometric composition of the films. The resistivity increased with ion fluence, resulting in a crossover behavior from n to p-type carriers. Compensation of bulk charge carriers was observed in the ion-irradiated films by adjusting the Fermi level.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Zhan-Kuo Guo, Han-Qing Chen, Hui-Lin Jiang, Bao-Xia Dong, Yun-Lei Teng
Summary: This study demonstrates that CO2 captured by CaO can be selectively converted to CH4 through Ni- and hydrogen-assisted calcium looping processes, providing an efficient solution to alleviate greenhouse effect and energy shortage.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Materials Science, Multidisciplinary
Huifeng Wang, Chao Zhang, Baoxia Dong, Dichang Zhong, Tongbu Lu
Summary: Metal-organic layers (MOLs) have attracted significant attention in materials science due to their unique characteristics. Over the past decade, there has been rapid development in the synthesis and applications of MOLs. This review presents the latest research advances on MOLs, including the two preparation approaches, applications in gas separation, catalysis, energy catalysis and conversion, and chemical sensors, as well as future opportunities and challenges.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Masakuni Yamaguchi, Tomoyuki Ichikawa, Yoshitsugu Kojima, Hiroki Miyaoka
Summary: In this study, the equilibrium pressure of zirconium phosphate during ammonia ab/desorption was measured using cavity ring-down spectroscopy (CRDS). Two-step equilibrium plateau pressure was observed during the ammonia desorption. Hysteresis in zirconium phosphate at different equilibrium pressures during ammonia desorption and absorption was also observed.
Article
Chemistry, Physical
Pankaj Kumar Singh, Keita Shinzato, Hiroyuki Gi, Takayuki Ichikawa, Hiroki Miyaoka
Summary: This study systematically investigates the catalytic properties of group 4-6 element oxides, including TiO2, ZrO2, HfO2, V2O5, Ta2O5, CrO3, MoO3, and WO3, on magnesium hydride (MgH2). The dispersion of each oxide on the MgH2 surface is achieved through ball-milling. The hydrogen desorption properties are analyzed, and the oxides on MgH2 are characterized structurally and spectroscopically. Among the oxides, TiO2, V2O5, ZrO2, and CrO3 exhibit higher catalytic activity, enabling hydrogen desorption at around 200°C. The dispersion of the oxides on Mg is found to be closely related to the catalytic process, except for MoO3. Multi oxide states, particularly the 2+ and 3+ oxidation states of transition metals, contribute to the high catalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yingtong Lv, Xiang Zhang, Wei Chen, Shunlong Ju, Zhenhua Liu, Guanglin Xia, Takayuki Ichikawa, Tengfei Zhang, Xuebin Yu
Summary: Nano-crystallization of MgH2 as an anode in all-solid-state lithium-ion batteries (ASSLIBs) using LiBH4 as a solid-state electrolyte is applied to improve cycling stability. The self-assembly designed MgH2 electrode on graphene effectively alleviates volume expansion, prevents agglomeration of active substances, improves electron transfer, and enhances electrochemical performance. The study demonstrates reversible capacity of 1214 mAh g-1 after 50 cycles and significantly enhanced cycle life with a capacity of 597 mAh g-1 after 200 cycles at a current density of 400 mA g-1. Full cell investigation also shows great application potential for ASSLIBs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Jiaxin Li, Baogang Zhang, Baoxia Dong, Ligang Feng
Summary: The excessive emission of CO2 from fossil fuel consumption has caused severe energy and environmental crises. The utilization of MOF-derived transition metal-based catalysts for the electrochemical reduction of CO2 to CO has shown great potential. This mini-review provides an overview of the catalytic mechanism, various compositions, and challenges associated with MOF-derived transition metal-based catalysts for selective CO2RR to CO, aiming to guide the design and application of efficient catalysts.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhan-Kuo Guo, Han-Qing Chen, Hui -Lin Jiang, Bao-Xia Dong, Yun-Lei Teng
Summary: Storing and hydrogenating CO2 to CH4 is an efficient solution for addressing the greenhouse effect and energy shortage. This study demonstrates the selective conversion of CaO-captured CO2 to CH4 using Ni- and hydrogen-assisted calcium looping (CaL) processes. The Ni/CaO composite is synthesized in one step at room temperature without CO2 emission or the use of solvents. The study shows improved CO2 capture properties of CaO, lower CaO recovery temperature, and selective production of valuable CH4 through Ni- and hydrogen-assisted CaL processes at moderate/high temperature, achieving a methane yield of 68.58% and methane selectivity of 100% under mild conditions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Masakuni Yamaguchi, Yoshitsugu Kojima, Hiroki Miyaoka
Summary: This study investigates the regeneration process of ammonia-absorbed zirconium phosphate and finds that it can be regenerated at 473K by reabsorbing ammonia and water, allowing for repeated use.
Article
Electrochemistry
Kishore Singh, Yuchen Yao, Takayuki Ichikawa, Ankur Jain, Rini Singh
Summary: Electrochemical energy storage is an important solution to meet the intermittent renewable energy production. All-solid-state batteries, with zinc electrodes as a promising material, offer high gravimetric capacity and stability. The experimental results demonstrate that zinc electrodes in two different solid-state electrolytes show high volumetric density and coulombic efficiency, making them a potential choice for future all-solid-state Li-ion batteries.
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)
