Article
Chemistry, Multidisciplinary
Yunrui Wei, Xixi Zhang, Zonghua Wang, Jiangmei Yin, Jinzhao Huang, Gang Zhao, Xijin Xu
Summary: In this study, Ni-Co mixed metal phosphide hollow and porous polyhedrons were successfully composited, exhibiting excellent electrochemical properties for hydrogen evolution reaction.
By doping Ni elements and utilizing the well-defined hollow and porous structure, the NiCoP hollow and porous polyhedrons demonstrated improved electrochemical performance and mechanical stability over a wide pH range.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Physical
Peng Zhang, Xiaobin Hui, Huiyang Wang, Xueping Gao, Longwei Yin
Summary: Rechargeable non-aqueous lithium oxygen batteries (LOBs) are considered promising next-generation battery technologies due to their high theoretical energy density, but face challenges due to slow reaction kinetics and parasitic reactions. This study successfully fabricated self-standing ZnCo2S4 nanosheet arrays as efficient cathodes for LOBs, with a hollow and porous structure that enhances catalytic activity and improves ion transportation. The introduction of Zn in the ZnCo2S4 structure increases catalytic activity, leading to high initial discharge capacity, smaller overpotential, and longer cycle life.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Peng Su, Hai Liu, Zhiliang Jin
Summary: This work presents the preparation of Co3O4/NiCo2O4 hollow double-shell polyhedrons as a catalyst for photocatalytic hydrogen production. The unique catalyst shows self-supporting structure, high light-trapping ability, and effective separation and migration of carriers, leading to increased hydrogen evolution rate.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Siva Kumar Ramesh, Vinoth Ganesan, Jinkwon Kim
Summary: The study successfully synthesized NiSe2-FeSe DHPs using a MOF self-templating method, exhibiting excellent OER performance. The improved stability and efficiency are attributed to the abundant electrocatalytic active sites, large surface area, and synergistic effect of heterostructure interfaces.
ACS APPLIED ENERGY MATERIALS
(2021)
Review
Materials Science, Composites
Jing Hu, Lujie Cao, Zhenyu Wang, Jinlong Liu, Junjun Zhang, Yulin Cao, Zhouguang Lu, Hua Cheng
Summary: A porous hollow high-entropy metal organic framework (MOF-74) was prepared using a one-pot hydrothermal method, and a high-entropy nanocomposite was evaluated as an electrocatalyst for the oxygen reduction reaction (ORR). The optimal nanocomposite exhibited promising ORR performance due to the unique synergistic effect between multi-component high-entropy feature and hollow nanostructure, indicating the enlightening potential of high-entropy nanocomposites in developing high-performance electrocatalysts.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Applied
Yu Gu, Xiaolei Wang, Muhammad Humayun, Linfeng Li, Huachuan Sun, Xuefei Xu, Xinying Xue, Aziz Habibi-Yangjeh, Kristiaan Temst, Chundong Wang
Summary: This study reports the spin engineering of a nanocage-structured material that exhibits significant activity for oxygen evolution reaction (OER). By modulating the spin polarization number, enhanced adsorption and desorption energy for intermediate oxygenated species are achieved, resulting in efficient OER performance.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Libing Fan, Tian Meng, Mengxia Yan, Dewen Wang, Yuting Chen, Zhicai Xing, Erkang Wang, Xiurong Yang
Summary: Transition metal oxides (TMOs) and their heterostructure hybrids have shown promising catalytic activity for hydrogen evolution reaction (HER). The design of Ru-Co oxides/Co3O4 double-shelled hollow polyhedrons exhibits outstanding HER performance with low overpotential, small Tafel slope, and robust stability in alkaline solution. This strategy opens new avenues for designing TMOs with special structures for electrochemical applications.
Article
Chemistry, Inorganic & Nuclear
Zhiyuan Xing, Minsong Huang, Qilu Yao, Gang Feng, Jia Zhu, Qi-Long Zhu, Zhang-Hui Lu
Summary: In this study, a rational method was proposed to design nonprecious-metal catalysts with high activity for the oxygen evolution reaction (OER). Fe-doped Ni2P hollow polyhedrons decorated with nitrogen-doped carbon showed impressive electrocatalytic performance, surpassing commercial RuO2 and other comparative electrocatalysts. The synthetic strategy used in this work can also be extended to other materials, demonstrating the potential for developing robust electrocatalysts with long-term durability.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Qiuhong Sun, Jie Liu, Xiangli Ji, Dandan Chen, Yuanyuan Guo, Lujiao Mao, Jinjie Qian
Summary: This study fabricated nitrogen-doped carbon spheres with hollow structures and Co2P doping through the use of self-sacrificing templates, and found that these electrocatalysts exhibited excellent oxygen evolution reaction performance. These findings highlight the significance of hollow structures and Co2P-doping in the design of active non-noble metal electrocatalysts for future applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Hongjung Kim, Jinhyuk Baek, Dong-Kyu Son, Michael Ruby Raj, Gibaek Lee
Summary: This paper presents a study on silicon nanoparticles-encapsulated hollow porous carbon nanocubes as anode materials for lithium-ion batteries. The materials exhibit excellent reversible capacity, rate capability, and cycling stability, addressing the challenge of structural pulverization in silicon-based anodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Electrochemistry
Seunghwa Lee, Lichen Bai, Jaehoon Jeong, David Stenzel, Simon Schweidler, Ben Breitung
Summary: High-entropy molybdates (HEMo) are electrochemically activated and used as oxygen evolution catalysts in alkaline media. The activated HEMo shows improved performance compared to the pristine HEMo, including lower overpotential and higher Tafel slope. The enhancement is likely due to the change in active sites and increased electrochemical surface area after activation. This study provides insights into the application of HEMo in electrocatalysis and the design of nanoparticles containing multiple cations, as well as the role of FeOOH as an active OER catalyst.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Xiangkun Zhang, Xu Hu, Suxue Lv, Yun Li, Jingru Ren, Yongmin Huang
Summary: Non-precious metal-based electrocatalysts with superior activity and stability for ORR and OER have been successfully synthesized through a tannic acid etching strategy, leading to the development of efficient Fe-N-C, Fe/Co-N-C, and Fe/Ni-N-C catalysts. The improvement of catalyst performance via simple TA etching and chelation method provides a novel strategy for designing and synthesizing efficient electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Analytical
Ying Chu, Qian-Lei Jiang, Li -Yuan Chang, Yu -Hong Jin, Ru-Zhi Wang
Summary: In this work, Co particles coated with nitrogen-doped porous carbon (Co@NC) are obtained by carbonizing ZnCo-ZIF materials produced through a facile electrodeposition method. The obtained Co@NC catalyst exhibits an outstanding oxygen reduction reaction (ORR) property, surpassing the benchmark Pt/C catalyst. It also shows excellent methanol-tolerance ability and stability. This research provides insights for designing cost-effective platinum-free catalysts for proton exchange membrane fuel cells.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Juan Gao, Xin Yu, Yaxin Li, Yurong Ma
Summary: In this study, a hollow Co-Ferrocene-MOFs derived phosphide catalyst was successfully synthesized, and phase conversion and vacancies generation were achieved through the subtle regulation of doped Zn. The catalyst exhibited more reaction sites, high conductivity, and remarkable catalytical performance.
Article
Chemistry, Physical
Fengzhan Sun, Hao Xu, Wen Zhu, Chong Lu, Li Ren, Lina Chong, Jianxin Zou
Summary: Carboxylate-based metal-organic frameworks (MOFs) with hierarchical porous structure and redox-active metal centers have shown promising electrocatalytic activity for oxygen evolution reaction (OER). In this study, uniform hollow structured Fe-free bi-metal (Co, Ni) MOF-74 nanoprisms were successfully synthesized using a solvothermal method. The CoNi MOF-74 exhibited high electrocatalytic activity for OER in alkaline condition, and it maintained its performance for 100 hours with 83.25% retention of current density. The enhanced catalytic activity can be attributed to the amorphous Ni-Co (oxy)hydroxide and electron transfer from Ni2+ to Co2+. This work reveals the potential application of MOF materials as efficient electrocatalysts for OER.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Mechanical
Bo Zhang, Zhen-Hua Wang
Summary: Ti-6Al-4V titanium alloy manufactured by selective laser melting (SLM) has unique structure and properties, with higher yield and ultimate tensile strengths but lower ductility compared to traditionally processed samples. Thermal treatment affects the machinability of SLMed Ti-6Al-4V alloys, with heat-treated samples having lower friction coefficients and higher wear-rates, but higher cutting forces compared to as-built samples. However, heat-treated samples produce better surface roughness during machining, and the optimal cutting parameters are the same for both materials.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Multidisciplinary Sciences
Xun Sun, Yue Qiu, Bo Jiang, Zhaoyu Chen, Chenghao Zhao, Hao Zhou, Li Yang, Lishuang Fan, Yu Zhang, Naiqing Zhang
Summary: In this study, an isolated Fe-Co heteronuclear diatomic catalyst is reported for high efficiency bifunctional catalysis in lithium-sulfur batteries. The Fe-Co diatomic catalytic materials supported by hollow carbon spheres achieve high-efficiency catalysis for the conversion of polysulfides and the decomposition of Li2S simultaneously. The excellent bifunctional catalytic activity originates from the diatomic synergy between Fe and Co atoms.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Mechanical
Pingju Hao, Yuanming Liu, Zhenhua Wang, Tao Wang, Dongping He, Qingxue Huang, Zhenguo Wang
Summary: Corrugated clad rolling is a promising technology for producing composite plates with a three-dimensional corrugated interface. A new analytical model is proposed to predict and analyze force and deformation parameters in corrugated clad rolling. The model considers the special features of this rolling process and provides accurate calculations for various parameters. The accuracy of the model is verified through comparisons with FEM results and experimental measurements.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Organic
Ping Fang, Tian-Sheng Mei, Zeng He, Hui-Lin Liu, Zhen-Hua Wang, Ke-Jing Jiao, Zi-Meng Li, Zhang-Jian Li
Summary: A method for the C(sp3)-H alkenylation of N-aryl-tetrahydroisoquinoline (THIQ) has been developed by the combination of electrooxidation and a copper catalyst. The corresponding products were obtained with good to excellent yields under mild conditions. Moreover, TEMPO addition as an electron mediator is crucial for this transformation, enabling the oxidative reaction to proceed under a low electrode potential. Additionally, the catalytic asymmetric variant has been demonstrated with good enantioselectivity.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Yunjie Gou, Guangdong Li, Wang Sun, Jinshuo Qiao, Kening Sun, Zhenhua Wang
Summary: Reactive flash sintering (RFS) was introduced for the rapid and controllable synthesis of LiCoO2 (LCO) based on simple oxide precursors. The as-prepared LCO showed well-constructed and high crystallinity with controllable morphologies, and the grain size could be modulated by the magnitude of the applied limited current value. Additionally, the as-prepared LCO exhibited excellent cyclic stability and rate capacity compared to that synthesized by the conventional solid-phase sintering method, attributed to better crystallinity and less lithium loss. Therefore, RFS provides a new approach for the manufacture of LCO electrode and has the potential to be applied to other electrode materials for lithium-ion batteries.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Multidisciplinary Sciences
Zhenhua Wang, Meng Yang, Yufan Yang, Yonglin He, Hongwu Qian
Summary: This study presents the cryo-EM structures of human CEPT1 and its complex with CDP-choline, revealing a hydrophobic chamber involved in catalysis. Phosphatidylcholine (PC) and phosphatidylethanolamine (PE) are vital components of eukaryotic membranes and have various important roles. The structures of CEPT1 and its complex provide insights into the catalytic mechanism and potential substrate-triggered product release.
NATURE COMMUNICATIONS
(2023)
Article
Metallurgy & Metallurgical Engineering
Qiang Fu, Zhen-hua Wang, Gang Peng, Lou Chen, Da-guan Huang, Ning Li
Summary: The study investigates the triaxial mechanical behavior of basalt fiber-reinforced coral aggregate concrete (BFCAC). The results indicate that increasing confining pressure and basalt fiber content leads to a higher ductile deformation of BFCAC. The addition of basalt fiber and application of confining pressure enhance the contraction volume deformation and decrease the expansion volume deformation of BFCAC. The confining pressure effect on the peak deviatoric stress and elastic modulus of BFCAC increases with basalt fiber content.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Chemistry, Multidisciplinary
Qiang Fu, Zhenhua Wang, Yingkun Xue, Ditao Niu
Summary: Graphene oxide (GO) is a two-dimensional material with functionalized oxygen-containing groups on the surface of graphene. GO exhibits good dispersion and surface activity due to these functional groups. When incorporated into cement-based materials, GO acts as a catalyst, regulating the hydration process and morphology of the products. GO absorbs water molecules, enhances cement dissolution, and reduces the concentration of Ca2+ around cement particles, resulting in shortened induction periods and accelerated hydration. GO also provides nucleation sites, transforming needle-like and rod-like products into flower-like or polyhedral crystals. Moreover, GO optimizes the pore structure and interface transition zone of cement-based materials, reducing ITZ width and increasing ITZ density.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Computer Science, Artificial Intelligence
Zihao Ding, Guodong Chen, Zhenhua Wang, Lining Sun
Summary: The use of robots in various industries is evolving from mechanization to intelligence and precision. However, robot recognition technology mainly relies on visual sensors, which lack critical information such as object material, leading to incomplete cognition. Therefore, multimodal information fusion is believed to be key to the development of robot recognition.
FRONTIERS IN NEUROROBOTICS
(2023)
Review
Electrochemistry
Chenyang Zhao, Yu Zhang, Jiaze Gao, Zhikun Guo, Aosai Chen, Nannan Liu, Xingyuan Lu, Xigui Zhang, Naiqing Zhang
Summary: In this review, the importance of designing a zincophilic interface for improving the performance of aqueous zinc-ion batteries is emphasized. The optimization strategies for the zincophilic zinc metal anode/electrolyte interface are summarized. The challenges and prospects for further exploration and balance of zincophilicity are presented to promote in-depth research and practical applications of advanced aqueous zinc-ion batteries.
BATTERIES & SUPERCAPS
(2023)
Article
Engineering, Industrial
Yuanming Liu, Yaxin Li, Zhenhua Wang, Yanxiao Liu, Tao Wang, Qingxue Huang, Tianxiang Wang
Summary: The advantages of stainless steel/carbon steel clad plates include corrosion resistance, low cost, good ductility, etc., which are usually used as chief load-bearing components. However, the low bonding strength and bearing capacity of clad plates severely limit their wide application. This study investigates the deformation characteristic, mechanical property, and microstructure evolution of 316 L/Q235B/316 L clad plates prepared by the longitudinal corrugated rolling (LCR) method. The effects of LCR and traditional flat rolling (FR) processes on the performance of clad plates are compared and analyzed. The results show that the LCR process can significantly improve the shear strength, tensile strength, and bending strength of the clad plates, as well as change the grain state and metal flow.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Rui Sun, Lin Peng, Meixiu Qu, Weiwei Yang, Zhenhua Wang, Yu Bai, Kening Sun
Summary: In this study, sulfur-doped CoP nanoparticles embedded in hollow carbon microspheres (C@S-CoP) were designed and used as modification material for the separator in lithium-sulfur (Li-S) batteries. The introduction of sulfur atoms enhanced chemi-sorption for lithium polysulfides (LiPSs) and improved the conversion kinetics of sulfur species. The hollow porous structure of C@S-CoP facilitated electrolyte penetration and alleviated the expansion of sulfur species during cycling. The experimental results showed that the Li-S battery with C@S-CoP separator exhibited superior rate performance and excellent cyclability.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Erlei Zhang, Huijie Tian, Meng Li, Shiru Le, Lijun Wu, Bingjiang Li, Lishuang Fan, Naiqing Zhang
Summary: MTC was added as an electrolyte additive in lithium metal batteries, forming solid electrolyte interfaces to protect both the anode and cathode. Additionally, MTC acted as a Lewis base to remove HF and prevent electrolyte deterioration. Therefore, appropriate addition of MTC can effectively enhance the electrochemical performance of lithium metal batteries.
CHEMICAL COMMUNICATIONS
(2023)
Article
Engineering, Geological
Chang Yuan, Qi-hao Yu, Dong-wei Li, Xin Chen, Jin Qian, Zhenhua Wang, Yuan-ming Lai
Summary: This study reveals the thermal control mechanism of a ventilated-closed block layer composite embankment structure by analyzing the heat transfer and temperature change. The results show that there is natural convection occurring in the block layer during the cold season, and heat convection transfers heat from the foundation upwards through the block layer. During the warm season, air inside the block layer is almost static, and external heat is transferred downwards through the block layer via heat conduction. This research can contribute to thermal control technology development and construction scheme selection of expressway in permafrost regions.
CANADIAN GEOTECHNICAL JOURNAL
(2023)
Article
Automation & Control Systems
Jan Mast, Zonglin Liu, Zhenhua Wang, Olaf Stursberg
Summary: This letter introduces a novel method to address communication delay and communication frequency in distributed state estimation using a unified structure. Two estimation strategies are proposed, guaranteeing convergence of the estimation error. This approach also considers the task of determining necessary communication frequency for obtaining specified performance of distributed estimation.
IEEE CONTROL SYSTEMS LETTERS
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
