Article
Chemistry, Physical
Ngoc-Anh Nguyen, Enkhjin Chuluunbat, Tuan Anh Nguyen, Ho-Suk Choi
Summary: This study investigates the use of low-loading metal-based tungsten oxide (WO3) as electrocatalysts for hydrogen evolution reaction (HER) in acid, alkaline, and alkaline-seawater electrolytes. Rhodium (Rh)-WO3 exhibits high HER activity in alkaline-seawater electrolyte and can be used as a cathode along with commercial ruthenium oxide (RuO2) as an anode for overall water splitting with excellent efficiency and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Zhi Chen, Ying Zhao, Yuxiao Gao, Zexing Wu, Lei Wang
Summary: This study demonstrates a novel and facile strategy for designing highly efficient and stable nanomaterials for hydrogen production by preparing MoP-RuP2@NPC electrocatalyst with porous nanostructure and abundant active sites. Compared to other materials, MoP-RuP2@NPC shows superior electrocatalytic performance for hydrogen evolution reactions. Furthermore, intermittent solar energy, wind energy, and thermal energy were successfully utilized to drive the electrolyzer for hydrogen gas generation.
Article
Nanoscience & Nanotechnology
Weiwei Zhu, Zhongya Jiang, Xiang Peng, Zhaorong Li, Abebe Reda Woldu, Fushen Lu, Yiwen Fang, Paul K. Chu, Liangsheng Hu
Summary: In this study, a metal-metal carbide Janus hierarchical structure catalyst was successfully synthesized and demonstrated to possess highly efficient hydrogen evolution reaction activity in both acidic and alkaline media, as well as excellent stability.
Article
Chemistry, Physical
Yu Zhang, Keke Xu, Bo Zhang, Shundong Guan, Xiuli Fu, Zhijian Peng
Summary: This study synthesized praseodymium-doped NiCoP nanowire arrays as electrocatalysts and found that the introduction of Pr can modulate the morphology and electrical conductivity, leading to exceptional HER performance. When the additive molar amount of Pr is 10%, the electrode exhibited the highest electrocatalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Zi-Yu Fu, Hou-Ming Xu, Wan-Hong Li, Guan-Ping Jin, Shi-Kui Han
Summary: In this study, a series of Ru-based hybrid nanostructure (HN) materials with desired crystal phases were designed through phase engineering and chemical transformation. The t-Ru-RuS2 HN material exhibited the best overpotential and small Tafel slope, surpassing commercial Pt/C catalysts.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Duo Yang, Jing-He Yang, Yong-Peng Yang, Zhong-Yi Liu
Summary: In this study, Cu@Cu3P-Ru/CCG nanocatalyst is synthesized for the hydrogen evolution reaction (HER). TEM analysis reveals the average diameter of Cu@Cu3P-Ru/CCG-500 nanoparticles to be 2 nm. AC-HAADF-STEM and Ru K-edge XAFS results confirm the atomic dispersion of Ru on Cu3P and chemically converted graphene. Cu@Cu3P-Ru/CCG-500 exhibits a low overpotential of 32.97 mV to reach a current density of 10 mA cm(-2) in 1 M KOH. Its Tafel slope is 66.40 mV dec(-1) in 1 M KOH, indicating efficient HER activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Xiaonan Zheng, Yuan Yao, Wei Ye, Peng Gao, Yang Liu
Summary: Developing efficient and cost-effective electrocatalysts for the hydrogen evolution reaction (HER) is crucial for clean energy technology. The study designed a series of catalysts with dual active sites and tunable electronic structures, showing promising HER activities under both acidic and alkaline conditions. The results provide a mechanism-based strategy for developing advanced materials as electrochemical catalysts for HER across a wide pH range.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Qiuyan Hao, Liang Zhang, Yaohui Gao, Da Cao, Jianwei Zhao, Ying Li, Caichi Liu, Zhi Qiao, Wenjun He, Hui Liu
Summary: In this study, we designed and fabricated sulfur-doped Fe2O3 nanosheet arrays, which exhibited enhanced performance for hydrogen evolution reaction in alkaline media. Sulfur anions were found to optimize the adsorption free energies of hydrogen/water and improve the intrinsic activity of the Fe2O3 catalyst. This work not only developed a highly efficient catalyst, but also provided design guidance for the rational manufacture of earth-abundant-element electrocatalysts for large-scale water splitting.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Wenli Yu, Zhi Chen, Yunlei Fu, Weiping Xiao, Tianyi Ma, Bin Dong, Yongming Chai, Zexing Wu, Lei Wang
Summary: This study presents a self-supported anticaustic three-dimensional microcolumn electrode for hydrogen production in seawater. The electrode exhibits superhydrophilic and aerophilic surface properties, and the strong synergistic effect between Pt and matrix significantly improves the hydrogen evolution reaction (HER) activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Dung T. To, Sun Hwa Park, Min Joong Kim, Hyun-Seok Cho, Nosang V. Myung
Summary: The electrocatalytic activities of the hydrogen evolution reaction (HER) were evaluated and correlated with the composition, crystal structure, and crystallinity. Deposits with mixed phases exhibited the highest electro-chemically active surface area (ECSA), leading to enhanced exchange current density and overpotential. Low overpotentials were observed with specific Mo content. Tafel slope and exchange current density showed no dependence on Mo content, crystal phase, and grain size when normalized with ESCA. The metallic Ni-Mo thin films exhibited low mixed potential and overpotential at 10 mA/cm2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Li-Hong Zheng, Chou-Kun Tang, Qiu-Feng Lu, Junxiong Wu
Summary: In this work, a highly-efficient electrocatalyst Pd@MoS2/Mo2TiC2Tx for hydrogen evolution reaction is prepared, which shows excellent performance and stability. It demonstrates great potential in the field of electrocatalysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Huizhen Wang, Pengfei Yang, Dongzheng Liu, Mengzhen Yu, Bowen Zhou, Yubing Zhang, Zhenyu Xiao, Weiping Xiao, Zexing Wu, Lei Wang
Summary: In this work, nitrogen-doped carbon nanosheets supported RuM (Mo, W, Cr) catalysts were prepared through an ultrafast microwave approach. The coupling between the carbon nanosheets structure and ultrasmall RuM nanoparticles leads to rich active sites, optimizing catalytic activity. The developed RuMo/NCN (RuW/NCN) catalysts exhibit excellent hydrogen evolution reaction (HER) activity in various pH environments, making them promising for practical applications in renewable energy fields.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Yanmei Ren, Jiajun Wang, Wenjun Hu, He Wen, Yuping Qiu, Piaoping Tang, Muhua Chen, Ping Wang
Summary: Transition metal borides (TMBs) are a class of important electrocatalytic materials for water splitting, but the synthesis of complex nanostructured TMBs with tunable surface properties is a major obstacle. In this study, a hierarchical nanostructured Co-Mo-B/CoMoO4-x composite supported on cobalt foam was fabricated via a hydrothermal method, resulting in high activity and stability for the alkaline hydrogen evolution reaction (HER), outperforming most reported TMB electrocatalysts.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Hui Liu, Kai Wang, Wenjun He, Xuerong Zheng, Tao Gong, Ying Li, Jianling Zhao, Jun Zhang, Limin Liang
Summary: A novel P-doped NiSe2 nanosheet arrays anchored on the carbon cloth show significantly optimized HER performance, with low overpotential, high catalytic activity and long-term durability in alkaline media. The successful P doping enhances the electronic structures and hydrogen adsorption free energy of NiSe2, providing new ways for designing high-efficient HER electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Abu Talha Aqueel Ahmed, Sankar Sekar, Sejoon Lee, Hyunsik Im, V Preethi, Abu Saad Ansari
Summary: This study investigates the successful nitrogenation of CoS2 catalyst and its outstanding hydrogen evolution reaction (HER) performance in alkaline and acidic electrolyte media. The optimized catalyst exhibits a low overpotential and excellent durability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Pengyuan Zhang, Zhengyi Xu, Bo Zhang, Bing Lei, Zhiyuan Feng, Guozhe Meng, Yanqiu Wang, Junyi Wang, Fuhui Wang
Summary: In our previous work, we discovered that the addition of Ce salt to the plating solution can significantly reduce hydrogen permeation during Ni-Cu electroplating. In the present work, we further studied the mechanism of hydrogen permeation inhibition by Ce salt. Through the fitting of the Iver-Pickering-Zamenzadeh (IPZ) model, we found that the precipitation of trace Ce salt during electroplating can improve reaction kinetic parameters and weaken the strength of Ni-H and Cu-H bonds. Ce salt can effectively inhibit hydrogen permeation and reduce the dehydrogenation annealing time, thus offering great potential for energy saving and emission reduction in the electroplating industry.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Shaojun Liu, Jingang Zheng, Bo Zhang, Yingqiang Wu, Jinli Liu, Lianfang Yin, Miao Zhan, Yuanhua Xiao, Baigang An, Li Wang, Chengguo Sun, Xiangming He
Summary: A polyol solvothermal method is developed to synthesize LiMn0.7Fe0.3PO4, which can simultaneously increase particle size (decrease specific surface area) and regulate crystal orientation (improve kinetics) to enhance lithium ion diffusion kinetics. Cobalt doping and carbon coating further improve the kinetic properties. Electrochemical measurements show increased Li+ diffusion kinetics for the Fe2+/3+ and Mn2+/3+ redox couple during charging and discharging, respectively. The material exhibits a capacity of 150 mAh g-1 at a 5C rate, and in full batteries, it retains 89.6% capacity over 1000 cycles at a 1C rate.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Pin Lv, Yufei Yang, Neng Li, Yuxi Zhang, Min Hu, Bo Huang, Yanqing Zhu, Yulong Wang, Junye Pan, Shifeng Wang, Bo Zhang, Fuzhi Huang, Yi-Bing Cheng, Jianfeng Lu
Summary: In this study, tin oxide is modified to enhance the efficiency of perovskite solar cells. The modification method reduces interfacial defects and improves charge transfer. The modified solar cells showed a power conversion efficiency of 23.4% and stable performance even after aging for 600 hours.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Chenfan Liang, Jing Zhou, Yu Wang, Zhijian Peng
Summary: In order to improve the service life of the newly designed pneumatic downhole motor, commercially available lithium complex grease was used to prevent rapid wear-induced failure of the dynamic seal in operation. The investigation on the tribological behaviors of QBe2 beryllium bronze and 38CrMoAlA steel tribo-pairs revealed that lubrication significantly reduced friction and wear volume. Moreover, the oxidation of Cu and Fe formed composite oxides between the frictional surface, further improving the lubrication effect. Stable operation for over 150 hours under lubrication fully met the requirements of pneumatic downhole tools in actual drilling conditions, providing solid support for practical application.
Article
Engineering, Chemical
Zhongshun Sun, Bo Zhang, Rongjiang Zhang, XiangYang Mao, Jianxuan Shang, Bolun Yang, Zhiqiang Wu
Summary: This paper proposes a chemical looping reforming (CLR) of volatiles from biomass pyrolysis based on a decoupling strategy to convert macromolecular volatiles into hydrogen-rich syngas. A highly active and selective oxygen carrier (OC) SBA-15 encapsulating LaFexM1-xO3 (M = Ni, Cu, Co) for the biomass CLR process was developed. Experimental results showed that the encapsulation effect improved the dispersion and reaction performance of the metal oxide.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Computer Science, Information Systems
Xinjian Long, Xiangyang Gong, Bo Zhang, Huiyang Zhou
Summary: This paper proposes a novel framework for UVM oversubscription management in discrete CPU-GPU systems, which significantly outperforms the state-of-the-art methods on memory-intensive benchmarks. It reduces page thrashing and achieves improved IPC under different levels of memory oversubscription.
JOURNAL OF GRID COMPUTING
(2023)
Article
Computer Science, Theory & Methods
Xinjian Long, Xiangyang Gong, Bo Zhang, Huiyang Zhou
Summary: This paper proposes a novel framework for page prefetching for UVM through deep learning, achieving high accuracy and lower cost compared to the state-of-the-art methods. The proposed solution improves the performance, memory page hit rate, and reduces the interconnect traffic.
JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING
(2023)
Article
Chemistry, Multidisciplinary
Bo Zhang, Wei Liu, Yipu Sun, Weijian Yang, Longjun Chen, Jiaqi Xie, Wenqi Li
Summary: The effect of using 1 wt% Cr instead of 1 wt% Ni on the corrosion behavior of 3 wt% Ni steel in the simulated tropical marine atmospheric environment was studied. The results showed that replacing part of Ni with Cr effectively promoted the conversion of gamma-FeOOH to alpha-FeOOH during early stages of corrosion, facilitating the densification of the rust layer to prevent corrosive media intrusion. However, as corrosion test periods and Cl- concentration increased, the hydrolysis effect of Cr caused local acidification, leading to deeper corrosion pits, severe local corrosion, and disrupting the protective nature of the rust layer.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Review
Materials Science, Multidisciplinary
Yan Chen, Xiuli Fu, Zhijian Peng
Summary: Photocatalytic technology based on semiconductors' band structure is a promising solution to energy and environmental issues. TiO2, as a popular photocatalyst, has outstanding activity but its wide band gap limits its performance. Oxygen defects can narrow the band gap of TiO2, improving its photocatalytic activity. This review discusses the fundamentals of photocatalytic water splitting with TiO2, highlights the latest progress, and summarizes methods to induce oxygen defects. Modification approaches of oxygen-deficient TiO2 to enhance its performance are also outlined.
Article
Green & Sustainable Science & Technology
Changyan Yang, Yu Gong, Yinhang Qu, Jiayi Li, Bohan Yang, Rui Li, Dorothy S. Zhang, Baowei Wang, Yigang Ding, Bo Zhang
Summary: High-speed rail is an important part of global economic development, but its cleaning and maintenance can cause environmental pollution. This study used life cycle assessment to analyze and improve the sustainability of a concentrated complex enzyme detergent used for high-speed train maintenance. The results showed that the improved formulation could reduce carbon emissions by 5,500-9,200 tons per year and save between $4.4 and $7.4 million in annual production costs.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Materials Science, Multidisciplinary
Chengzheng Sun, Bo Zhang
Summary: This study investigates the changes in the structural stability of CdS after the introduction of Be element. The results show that Be element effectively regulates the structural, electronic, and elastic properties of CdS, providing guidance for the design of stable CdS-based electronic and optoelectronic devices.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jinkun Wang, Yun Gao, Jianhong Liu, Li Wang, Hong Xu, Yang Yang, Huaihe Song, Bo Zhang, Xiangming He
Summary: In this study, Li-rich Li2.24SrTi6-xZrxO14 materials with different Zr doping amounts were synthesized and the effect of Zr4+ doping on the properties of Li2.24SrTi6O14 was investigated. The results show that Zr4+ doping can effectively inhibit grain growth, improve the diffusion coefficient of Li+ in the material, and enhance high-rate charge-discharge performance. The optimal doping ratio is x = 0.1, with a capacity retention of 82.9% at 10C/1C. Excessive Zr4+ doping is harmful to the capacity and rate performance of the anode.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Haiyan Yan, Zhenguo Liu, Shujuan Chen, Yuqiao Fu, Yue Zhang, Bo Zhang, Yongji Chen
Summary: In this research, a promising strategy of polypyrrole coating and Zr4+ doping was introduced to improve the conductivity of LVP material. The Zr4+-doped and polypyrrole-coated LVZ(x)P@PPy electrode was synthesized by a facile way followed by an in-situ pyrrole polymerization procedure. The as-fabricated electrode exhibited outstanding rate property for lithium energy storage.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Information Science & Library Science
Bo Zhang, Weizhu Hou, Ximeng Zhang
Summary: Using a sample of Chinese listed firms from 2012 to 2020, this study investigates the impact of employee training on audit fees and firm risk. The results show that employee training expenses are negatively related to audit fees, indicating that auditors consider employee training as a factor in assessing firm risk. Path analysis reveals that employee training contributes to a decrease in audit pricing by reducing inherent risk, control risk, and litigation risk. Textual analysis further categorizes employee training types and finds that companies conducting product quality, control environment, and employee quality training have significantly lower audit fees. The relationship between employee training expenses and audit fees is less pronounced for firms with lower human capital. Overall, auditors perceive employee training as a crucial determinant of firm risk, which has a positive impact on firms.
INFORMATION TECHNOLOGY & MANAGEMENT
(2023)
Article
Chemistry, Physical
Yufang He, Li Wang, Bo Zhang, Hiep Pham, Hong Xu, Jonghyun Park, Xiangming He
Summary: In this study, the impact of delithiation paths on the lattice volume turning point and capacity utilization of LixCoO2 was investigated. The results showed that the interlayer distances between oxygen atoms played a significant role in volume increase and decrease. Moreover, the study revealed the involvement of lattice oxygen in charge compensation during the delithiation process, emphasizing the importance of careful design to avoid Co-Li antisite defects and oxygen release for better LiCoO2 performance. Furthermore, it proposed the use of elemental doping and defects control to enhance the capacity utilization of LiCoO2.
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)