Article
Chemistry, Physical
Donglin Han, Xin Liu, Tor Svendsen Bjorheim, Tetsuya Uda
Summary: Increasing Ce content in Y-doped BaZrO3, BaCeO3, and their solid solutions stabilizes protons, increases oxide ion conductivity, and decreases hole conduction, thereby enhancing the ionic conduction of BZCY20 for improved performance in fuel cells and electrolysis cells.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
J. Wallis, S. Ricote, K-D Weltmann, E. Burkel, A. Kruth
Summary: In this study, BaZr0?7Ce0?2Y0?1O3-? (BZCY72) proton-conducting ceramics were prepared using Spark Plasma Sintering. The sintering temperature was found to have a significant impact on the microstructural, crystallographic, and electrochemical properties of BZCY72, with the best results achieved at 1450°C. The increase in temperature resulted in denser samples, larger crystallite and grain sizes, and higher GB conductivities.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Yifeng Li, Shihang Guo, Donglin Han
Summary: In this study, researchers found that there was good chemical compatibility between NiO and BaZr0.8Yb0.2O3 or BaZr0.8Tm0.2O3 at 1500 degrees Celsius. Additionally, BaZr0.8Y0.1Yb0.1O3 and BaZr0.8Y0.12Yb0.08O3 showed good chemical compatibility with NiO at 1350 and 1500 degrees Celsius. The co-doped BaZrzYxYb0.2-xO3 electrolyte exhibited higher conductivity compared to BaZr0.8Y0.2O3, with BaZr0.8Y0.1Yb0.1O3 showing the highest conductivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Akanksha Yadav, Ram Pyare, Thandavarayan Maiyalagan, Preetam Singh
Summary: Ceramic fuel cells offer more advantages over PMFCs due to their fuel flexibility and high performance at elevated temperature. Simultaneous substitution of K and Ga can improve the low ionic conductivity issues of BaZrO3 based materials at high temperature.
Article
Chemistry, Physical
Donglin Han, Lulu Jiang, Peng Zhong
Summary: This study improved the phase compatibility between BaZrO3-based electrolyte and NiO electrode substrate by adjusting the electrolyte composition and selecting proper dopants. However, high temperature heat treatment during co-sintering led to Ni diffusion into the electrolyte layer, negatively impacting performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Meilong Chen, Mingyang Zhou, Zhijun Liu, Jiang Liu
Summary: This paper compares the performance of two proton-conducting ceramic fuel cell electrolyte materials, BZY and BZCY. The results show that while BZCY has higher conductivity, BZY exhibits greater stability in a CO2-containing environment.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Zhaoyu Zhong, Xiaoqian Xu, Zhenhao Zhang, Jiao Li, Xue Guo, Shigang Wu, Haibin Sun
Summary: This study successfully fabricated dense BZCYYb electrolytes at low temperatures using microwave sintering technique, effectively suppressing barium evaporation and promoting grain growth, leading to improved electrical conductivity. The microwave-sintered BZCYYb electrolyte exhibited excellent conductivity at 700 degrees C, indicating its potential application in SOFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Donglin Han, Kazuhiro Goto, Masatoshi Majima, Tetsuya Uda
Summary: The addition of NiO in Y-doped BaZrO3, BaCeO3, and BaZr1-xCexO3 decreases dehydration temperature and proton concentration, leading to reduced ionic conductivity and transport number. This results in worse ion conductivity and brittle electrolyte in Ce-rich samples containing Ni.
Article
Chemistry, Physical
Wojciech Skubida, Daniel Jaworski, Aleksandra Mielewczyk-Gryn, Sebastian Wachowski, Tadeusz Miruszewski, Kacper Cichy, Konrad Swierczek, Maria Gazda
Summary: This research focuses on the transport properties of high-entropy BaZr1/8Hf1/8Sn1/8Ti1/8Y1/8In1/8Sm1/8Yb1/8O3-x perovskite oxide, with a particular emphasis on proton transport. The presence of proton defects is analyzed using thermogravimetry, and the proton and deuterium conductivities are evaluated using electrochemical impedance spectroscopy. The isotope effect is observed, and the contribution of proton conductivity to the total conductivity is established. Electrical conductivity relaxation studies are performed for the first time on high-entropy oxides, allowing the calculation of water kinetic coefficients and the determination of the chemical diffusion coefficient and chemical surface exchange coefficient of water.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Ceramics
L. S. Hagy, K. Ramos, M. V. Gelfuso, A. L. Chinelatto, A. S. A. Chinelatto
Summary: The reduction of sintering time and temperature for BaCe0.2Zr0.7Y0.1O3-delta was investigated using unconventional route and sintering aid. Effects of ZnO addition and microwave sintering on structure, sinterability, microstructure, and electrical conductivity were explored. Both ZnO addition and microwave sintering improved the density and conductivity, with microwave sintering providing a rapid alternative for sintering.
CERAMICS INTERNATIONAL
(2023)
Review
Materials Science, Ceramics
M. Khalid Hossain, Rajesh Chanda, A. El-Denglawey, Tanvir Emrose, M. Tayebur Rahman, Manik C. Biswas, Kenichi Hashizume
Summary: Doped BaZrO3 is a solid ion-conducting material with excellent proton conduction properties for electrolyte applications in electrochemical hydrogen devices operating in the intermediate temperature range of 400-650 degrees C. Enhanced proton transport properties and material fabrication processes of BZO can be achieved through the use of dopants, sintering aid, and various synthesis methods. The review highlights the applications of BZO in various electrochemical hydrogen devices and provides insights into the impact of different factors on the performance of BZO electrolyte materials.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Tomohiro Kuroha, Yoshiki Niina, Mizuki Shudo, Go Sakai, Naoki Matsunaga, Takehito Goto, Kosuke Yamauchi, Yuichi Mikami, Yuji Okuyama
Summary: This study investigates ceramic tape-casting and anode electrolyte co-firing for large-scale manufacturing of protonic ceramic fuel cells. It confirms the reactivity of certain metal elements with the anode material and reveals that NiO doping decreases the proton conductivity of all materials. The research identifies the suitable material BZYb20 for this fabrication technique.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
L. Spiridigliozzi, G. Accardo, E. Audasso, S. P. Yoon, G. Dell'Agli
Summary: Orthorhombic perovskite materials BaCe0.85Gd0.15O3-& delta; (BCGO) doped with variable amounts of CuO (0-5 mol%) were synthesized and exhibited high total ionic conductivities. Various characterization techniques were used to analyze the samples, including X-ray Diffraction (XRD), Rietveld refinement, Scanning Electron Microscopy (SEM), Raman spectroscopy, and Electrochemical Impedance Spectroscopy analysis (EIS). The addition of copper as a sintering aid improved the density and conductivity of BCGO, with the optimal content being around 2 mol%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Yonghyun Lim, Hojae Lee, Junghum Park, Young-Beom Kim
Summary: Solid oxide fuel cells (SOFCs) have the potential to become the next-generation energy conversion systems. However, the high processing temperature required for their multi-layer ceramic components has been a major barrier for commercialization. Researchers have developed a bi-layer sintering method that effectively lowers the sintering temperature of the electrolyte, leading to comparable cell performance with significantly reduced temperature.
CERAMICS INTERNATIONAL
(2022)
Review
Chemistry, Physical
Idris Temitope Bello, Shuo Zhai, Siyuan Zhao, Zheng Li, Na Yu, Meng Ni
Summary: Proton-conducting solid oxide fuel cells (P-SOFCs) show great potential for energy conversion with high efficiency and temperature adaptability, but research and development in this field are still limited globally.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Qinong Shao, Chenhui Yan, Mingxi Gao, Wubin Du, Jian Chen, Yaxiong Yang, Jiantuo Gan, Zhijun Wu, Wenping Sun, Yinzhu Jiang, Yongfeng Liu, Mingxia Gao, Hongge Pan
Summary: This study investigates the effects of Zr doping on the ionic conductivity and electrochemical stability window of Li3-xEr1-xZrxCl6 halide solid electrolytes. The results show that Zr doping can increase the ionic conductivity but narrows the electrochemical stability window. Furthermore, carbon additives are beneficial for achieving high discharge capacity, better cycling stability, and rate performance in halide-based all-solid-state lithium-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Liaona She, Guoqiang Zhao, Tianyi Ma, Jian Chen, Wenping Sun, Hongge Pan
Summary: This review summarizes the recent research progress on tackling the stability issues of Ir-based OER electrocatalysts in acid media, aiming to provide inspiration for designing highly active and stable Ir-based electrocatalysts.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Zhenglong Li, Shun Wang, Mingxia Gao, Kaicheng Xian, Yi Shen, Yaxiong Yang, Panyu Gao, Wenping Sun, Yongfeng Liu, Hongge Pan
Summary: By introducing Li3BO3 and V as catalysts, the dehydrogenation temperature of LiBH4 can be lowered and the reversibility can be improved, thus enhancing the hydrogen storage performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Bingxing Zhang, Yaping Chen, Jianmei Wang, Hongge Pan, Wenping Sun
Summary: Single-atom catalysts have gained attention in electrocatalysis for their exceptional activity, selectivity, and atom utilization. However, their limited metal-support interactions hinder their applications in complex reactions. Supported sub-nanometer cluster catalysts with nearly fully exposed active atoms may outperform single-atom catalysts in specific catalytic reactions. This review summarizes recent advances in supported sub-nanometer cluster catalysts in electrocatalysis and highlights the importance of support-cluster interactions and ensemble effects.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jiufeng Ruan, Yaping Chen, Guoqiang Zhao, Peng Li, Bingxing Zhang, Yinzhu Jiang, Tianyi Ma, Hongge Pan, Shi Xue Dou, Wenping Sun
Summary: Cobalt single atoms are introduced to enhance the electrocatalytic performance of N-doped carbon supported Pt for methanol oxidation reaction. The Co-N-C/Pt electrocatalyst exhibits impressive electrocatalytic activity, superior CO poisoning resistance, and durability.
Article
Chemistry, Physical
Yaping Chen, Xusheng Zheng, Jinyan Cai, Guoqiang Zhao, Bingxing Zhang, Zhouxin Luo, Gongming Wang, Hongge Pan, Wenping Sun
Summary: This study demonstrates the importance of tailoring the interfacial interaction between metal species and supports in supported electrocatalysts. By engineering a highly active interface in S-doped graphitic carbon nitride (SGCN)-supported Pt heterostructured electrocatalysts, enhanced oxygen reduction reaction (ORR) performance is achieved. The coordination and electronic structure of Pt species are modulated by S doping, resulting in strengthened Pt-N bonding and reinforcement of the metal-support interaction. The optimized 20Pt/SGCN-550 electrocatalyst exhibits excellent ORR performance and decent durability. This work not only advances the development of robust ORR electrocatalysts, but also provides a strategy for engineering heterostructured electrocatalysts with tunable interface chemistry for various catalytic applications.
Review
Chemistry, Physical
Zhouxin Luo, Guoqiang Zhao, Hongge Pan, Wenping Sun
Summary: This review provides a comprehensive overview and analysis of the formation mechanisms and surface energy minimization mechanisms of SMSI, as well as its applications in catalysts. It offers important insights for further research and design of advanced heterogeneous catalysts.
ADVANCED ENERGY MATERIALS
(2022)
Article
Multidisciplinary Sciences
Bingxing Zhang, Baohua Zhang, Guoqiang Zhao, Jianmei Wang, Danqing Liu, Yaping Chen, Lixue Xia, Mingxia Gao, Yongfeng Liu, Wenping Sun, Hongge Pan
Summary: Overcoming the sluggish kinetics of alkaline hydrogen oxidation reaction (HOR) is challenging but is of critical importance for practical anion exchange membrane fuel cells. Here, the authors report atomically dispersed chromium coordinated with hydroxyl clusters on ruthenium nanoparticles for accelerated hydrogen oxidation reaction.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Jianmei Wang, Bingxing Zhang, Wei Guo, Lei Wang, Jian Chen, Hongge Pan, Wenping Sun
Summary: The study of direct methanol fuel cells (DMFCs) has been ongoing for around 70 years, but commercialization is still a distant goal. The methanol oxidation reaction (MOR) is the bottleneck reaction that limits the overall performance of DMFCs. This review summarizes the controversies and progress in electrocatalytic mechanisms, performance evaluations, and design science for MOR electrocatalysts. It also provides an overview of the recent development of emerging MOR electrocatalysts, focusing on the innovation of alloy, core-shell structure, heterostructure, and single-atom catalysts. Perspectives on future research directions are also discussed.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Dan-Qing Liu, Zhouxin Luo, Bingxing Zhang, Guoqiang Zhao, Wei Guo, Jian Chen, Mingxia Gao, Yongfeng Liu, Hongge Pan, Wenping Sun
Summary: In this study, epitaxial growth of Ir nanoclusters on a MoS2 surface was reported, and the activity of alkaline hydrogen oxidation reaction was optimized by tailoring interfacial charge transfer and hydrogen binding energy between Ir clusters and MoS2. The results show that Ir/MoS2 exhibits better performance compared to carbon-supported Ir nanoclusters.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Lingchao Zhang, Xin Zhang, Wenxuan Zhang, Zhenguo Huang, Fang Fang, Juan Li, Limei Yang, Changdong Gu, Wenping Sun, Mingxia Gao, Hongge Pan, Yongfeng Liu
Summary: High thermal stability and sluggish absorption/desorption kinetics are limitations for using MgH2 as a hydrogen storage medium. Introducing a suitable catalyst, such as the novel nanoparticulate ZrNi, can significantly improve the hydrogen storage properties. The catalytic reaction of nano-ZrNi during the first de-/hydrogenation cycle forms active species that enhance the breaking and rebonding of H-H bonds and provide multiple hydrogen diffusion channels, leading to remarkably improved hydrogen absorption and desorption capabilities.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Xin Zhang, Xuelian Zhang, Lingchao Zhang, Zhenguo Huang, Limei Yang, Mingxia Gao, Changdong Gu, Wenping Sun, Hongge Pan, Yongfeng Liu
Summary: High operating temperatures and sluggish kinetics are obstacles for the practical application of MgH2 as a solid hydrogen carrier. This study investigates the catalytic activity of nanostructured niobium oxide (Nb2O5) and explores the relationship between nanoparticle size, morphology, and catalytic activity. The results demonstrate that the primary particle size is the decisive factor in the catalytic activity of Nb2O5, enabling dehydrogenation at low temperatures and higher reactivity due to the formation of more uniform and finer Nb-based active species when ball-milled with MgH2.
ACS APPLIED NANO MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Yaxiong Yang, Peng Li, Xiaobo Zheng, Wenping Sun, Shi Xue Dou, Tianyi Ma, Hongge Pan
Summary: This review provides a comprehensive overview of the fundamentals, technological progress, and future perspectives on AEMWEs and AEMFCs. It analyzes the market development status, key components, working management, and operation monitoring of these technologies, and identifies aspects that need further research.
CHEMICAL SOCIETY REVIEWS
(2022)
Review
Chemistry, Multidisciplinary
Xiaoyu (Baohua) Zhang, Xuezhang Xiao, Jian Chen, Yongfeng Liu, Hongge Pan, Wenping Sun, Mingxia Gao
Summary: In this review, recent advances in Ru-based electrocatalysts for alkaline hydrogen oxidation reaction (HOR) are summarized and the fundamental reaction mechanisms of the electrocatalytic HOR under alkaline conditions are discussed. The recent progress in Ru-based electrocatalysts is summarized based on four catalyst-design strategies including composition, support, size, and structure effects. Furthermore, the challenges and opportunities for developing advanced Ru-based HOR electrocatalysts are highlighted.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jingj Xiang, Minghe Luo, Xingxing Wu, Yaofeng Zhu, Xuan Zhang, Hongge Pan, Wenping Sun, Mi Yan, Yingying Lu, Yinzhu Jiang
Summary: This study investigates the impact of various Zn2+ coordinated configurations on Zn anode reversibility using ethylenediamine as a complexing agent. The results show that both symmetric Zn/Zn cells and Zn/NiHCF full cells exhibit significantly improved cycling stability under specific coordinated configurations.
CHEMICAL COMMUNICATIONS
(2022)
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)
