Article
Chemistry, Physical
Zhen Li, Dan Jin, Zhenghua Wang
Summary: The CeO2/CdSe-DETA nanocomposites have excellent photocatalytic hydrogen production activity due to the formation of a step-scheme heterojunction, efficient visible light absorption, and inheritance of a large specific surface area. These properties promote the separation of electron-hole pairs, enhance electron migration, and improve overall photocatalytic performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Haowen Liu, Jie Chen, Wenyao Guo, Qunjie Xu, Yulin Min
Summary: This study utilizes tungsten nitride (WN) as a co-catalyst to enhance the photoreduction hydrogen production of CdS nanoparticles. The improved performance is achieved by forming a Schottky junction at the heterogeneous interface.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Applied
Roberto Fiorenza, Stefano Andrea Balsamo, Marcello Condorelli, Luisa D'Urso, Giuseppe Compagnini, Salvatore Scire
Summary: This study investigated the utilization of different CeO2-based materials as unconventional photocatalysts for H2 production. The addition of HMTA surfactant during the preparation of CeO2-WO3 composites significantly enhanced H2 production when treated with laser irradiation, compared to other synthesis methods with smaller increases in hydrogen evolution. Characterization studies supported the more efficient doping and defect formation in CeO2 with the HMTA surfactant and laser treatment, showing potential for solar-driven photocatalysts for green H2 production.
Article
Materials Science, Ceramics
Xiuzhen Zheng, Xulin Wang, Jiafang Liu, Xianliang Fu, Yang Yang, Huijuan Han, You Fan, Sujuan Zhang, Sugang Meng, Shifu Chen
Summary: This research successfully combined NiS-modified CdS nanorods with MoS2 and NiPx cocatalysts to achieve efficient H2 production. The synergistic effects of heterostructure and cocatalysts are key factors in enhancing photocatalytic performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Xiang Liu, Binfen Wang, Qianqian Heng, Wei Chen, Xiying Li, Liqun Mao, Wenfeng Shangguan
Summary: The construction of a ternary 3D interconnected nanocomposite Ti3C2/MoS2/CdS with closely interfacial contact has been successfully achieved. This composite material exhibits excellent photocatalytic H-2 evolution activity by accelerating electron transfer and inhibiting carrier recombination.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Xing Chen, Taiping Hu, Jinfeng Zhang, Changchun Yang, Kai Dai, Chengsi Pan
Summary: In this study, a series of heterostructure photocatalysts of 2D/2D porous graphitic C3N4/CdS-diethylenetriamine (DETA) nanocomposites were designed for photocatalytic hydrogen production, with improved performance attributed to factors such as increased active sites from Pg-C3N4, faster interfacial charge separation and transfer in the 2D/2D heterojunction, and synergistic enhancement from DETA. The experimental results demonstrated significantly higher hydrogen evolution activity compared to individual CdS-DETA and Pg-C3N4, indicating the potential of this novel heterojunction design for application in photocatalysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Mohammedsani Mahamud, Abi M. Taddesse, Yiheyis Bogale, Zewdu Bezu
Summary: A novel ternary composite CdS/TiO2/CeO2 and its zeolite-support were synthesized and characterized. The photocatalytic performance of the synthesized nanocomposites was investigated using MB dye and a real sewage sample solution. The zeolite-supported composite exhibited superior photocatalytic activity compared to the naked CdS/TiO2/CeO2, binary, and single counter constituents. The research provides insight into a new and efficient visible-light-driven photocatalyst for the degradation of organic dyes in wastewater.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Physical
Huaiwei Zhang, Yifan Chen, Liang Bao, Jing-yuan Ge
Summary: A Z-scheme heterojunction with all-solid-state structures was constructed, in which carbon dots acted as electron transferring mediators. The modified photocatalysts showed significantly higher activities, with ammonia production rates reaching above 232 lmol center dot gcal-1 center dot h-1 under light irradiation. The improved catalytic properties were attributed to the increased number of photoinduced oxygen vacancies, excellent visible-light adsorption abilities, and efficient photogenerated electron-hole separation efficiencies for the carbon dots bridged heterostructures. This study provides reasonable guidance for applications in photocatalytic ammonia synthesis and a promising construction strategy for efficient Z-scheme photocatalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Shijie Huo, Chuangsheng Chen
Summary: CdS/single crystal ZnO nanorod heterostructure was fabricated via microwave synthesis method and CdS nanoparticles significantly enhanced the photocatalytic hydrogen generation ability by increasing specific surface area, promoting carrier separation and migration, and increasing light absorption. The composite sample showed a more narrow band gap, higher hydrogen production rate, larger specific surface area, and higher instantaneous photocurrent compared to pure ZnO and CdS nanoparticles. The microwave radiation method is simple, efficient, and provides a time-saving route for preparing metal oxide-based photocatalytic materials with high hydrogen evolution activity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yuping Sun, Binfen Wang, Xiaoqiang Liu, Li Gao, Wenfeng Shangguan
Summary: The metallic MoS2/WS2 dual cocatalysts were prepared by in situ growth of 1T-WS2 on the surface of 1T-MoS2, and the ternary cross-linked MoS2/WS2/CdS photocatalysts were constructed by growing CdS nanorods on MoS2/WS2 cocatalysts. The synthesized MoS2/WS2/CdS photocatalysts exhibited the lowest hydrogen evolution overpotential and the highest charge separation efficiency due to the synergistic effect between WS2 and MoS2. The hydrogen evolution rate of the MoS2/WS2/CdS composite was 12.12 mmol.g(-1).h(-1), which was 4.57 times that of pristine CdS. The AQY at ? = 420 nm was 58.9%.
Article
Chemistry, Physical
Zhiwei Li, Guangxue Huang, Yuebing Wang, Chunhua Lu, Hengming Huang, Jiahui Kou
Summary: The fast construction of CdS phase junction through local phase transition is a simple, compatible, and impactful strategy for enhancing photocatalysis.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Dongdong Chen, Xiaofeng Li, Kai Dai, Jinfeng Zhang, Graham Dawson
Summary: The activity of photocatalysts depends on the separation of internal charge carriers, thereby enhancing the redox ability. By designing a porous PCN/CS-D heterojunction, the hydrogen-evolution rate of the photocatalyst is significantly improved.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Xiaolei Liu, Qingzhe Zhang, Yong Wang, Chen Wang, Guolong Song, Dongling Ma
Summary: In this study, a photocatalyst with multi-interfacial charge transfer was developed, achieving both broadband H2 production and high activity through optimizing the photoinduced interfacial charge transfer at the CdS/CuS interface and the synergistic effect of NiS cocatalyst for H2 production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Anuja A. Yadav, Yuvaraj M. Hunge, Seok-Won Kang
Summary: In this study, a CeO2/MoS2 composite photocatalyst was successfully synthesized, exhibiting superior hydrogen production performance compared to individual CeO2 and MoS2. The composite showed higher photostability and faster charge transfer rate.
Article
Engineering, Chemical
Huixing Yang, Wei Li, Yangyang Jiang, Qiuming Wei, Linlin Hou, Zhiliang Wu, Qinyu He, Yinzhen Wang, Dingyuan Tang
Summary: The proper design of photocatalysts is crucial for improving the performance of photocatalytic decomposition of water and degradation of pollutants. In this study, a composite material CdS-DETA@g-C3N5 was synthesized by combining nitrogen-rich carbon nitride with CdS-DETA, which exhibited significantly higher hydrogen evolution rate and OFLX degradation rate compared to other catalysts. The enhancements in performance were attributed to the enhancement of energy band bending, construction of a built-in electric field, and retention of high redox carriers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xing Chen, Taiping Hu, Jinfeng Zhang, Changchun Yang, Kai Dai, Chengsi Pan
Summary: In this study, a series of heterostructure photocatalysts of 2D/2D porous graphitic C3N4/CdS-diethylenetriamine (DETA) nanocomposites were designed for photocatalytic hydrogen production, with improved performance attributed to factors such as increased active sites from Pg-C3N4, faster interfacial charge separation and transfer in the 2D/2D heterojunction, and synergistic enhancement from DETA. The experimental results demonstrated significantly higher hydrogen evolution activity compared to individual CdS-DETA and Pg-C3N4, indicating the potential of this novel heterojunction design for application in photocatalysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Feifei Mei, Jinfeng Zhang, Changhao Liang, Kai Dai
Summary: The formation of S-scheme heterojunction by growing CoO on PCN can enhance CO2 conversion efficiency and redox ability, accelerating charge separation and transfer at the interface for efficient photocatalysis.
Review
Physics, Applied
Muye Liu, Qi Kang, Zhicheng Xie, Luhua Lu, Kai Dai, Graham Dawson
Summary: This review introduces the concept of heterostructure nanocomposite and the basis of LSPR, controlled synthesis and recent research progress in the applications of LSPR in artificial photosynthesis, degradation of pollutants and deactivation of microorganisms.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Zhen Li, Tingting Ma, Jinfeng Zhang, Zhenghua Wang
Summary: This study demonstrates that by modulating the bandgap, the carrier transfer mechanism at the heterojunction of composite photocatalysts can be altered, leading to improved photocatalytic performance. Among the nanocomposites tested, the ZnO/Zn0.5Cd0.5S-DETA nanocomposite shows the best photocatalytic activity for hydrogen evolution under visible light, with excellent stability.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Green & Sustainable Science & Technology
Zhiwei Zhao, Kai Dai, Jinfeng Zhang, Graham Dawson
Summary: The design of a step-scheme (S-scheme) heterojunction can enhance the efficiency of photocatalytic hydrogen production by promoting the separation of photogenerated carriers and optimizing the oxidation-reduction capacity of the photocatalyst. In this study, an S-scheme heterojunction of MCS-DETA/Pg-C3N4 was designed, which significantly improved the hydrogen production efficiency under the same light conditions.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Materials Science, Ceramics
Yue Huang, Jinfeng Zhang, Kai Dai, Changhao Liang, Graham Dawson
Summary: Converting solar energy into chemical energy is a promising method to alleviate the global energy shortage. Constructing S-scheme heterojunction photocatalysts can achieve efficient separation and transfer of charge carriers.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Applied
Dongdong Chen, Xiaofeng Li, Kai Dai, Jinfeng Zhang, Graham Dawson
Summary: The activity of photocatalysts depends on the separation of internal charge carriers, thereby enhancing the redox ability. By designing a porous PCN/CS-D heterojunction, the hydrogen-evolution rate of the photocatalyst is significantly improved.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Zhen Li, Dan Jin, Zhenghua Wang
Summary: In this work, WO3(H2O)(0.333)/CdSe-DETA heterojunction nanocomposites were successfully synthesized and demonstrated to be efficient photocatalysts for hydrogen production. The step scheme pathway enabled efficient separation of electron-hole pairs generated by light illumination, leading to enhanced photocatalytic performance.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Zhiwei Zhao, Xiaofeng Li, Kai Dai, Jinfeng Zhang, Graham Dawson
Summary: This study synthesized S-scheme nanocomposites with good photocatalytic activity through the in-situ growth method to boost photocatalytic CO2 reduction and improve photocatalytic activity and stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
X. Li, Z. Wang, J. Zhang, K. Dai, K. Fan, G. Dawson
Summary: This study prepared Cd0.7Zn0.3Se solid solution through cation exchange and formed a heterojunction with Cu2O@Cu, which can improve the adsorption and conversion efficiency of CO2, providing new insights for the regulation of nanostructures and the design of catalysts.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Physical
Taiping Hu, Pengfei Li, Wei Zhang, Yixing Ye, Jun Liu, Yunyu Cai, Guofeng Zhang, Kai Dai, Changhao Liang
Summary: Designing high-performance catalysts for electrocatalytic hydrogen production remains a significant challenge. Small-size bimetallic alloy nanoparticles have garnered considerable attention in the field of electrocatalysis due to their large exposure of effective active sites and optimal geometric/electronic effects. In this study, ultra-small bimetallic PtM (M=Ni, Co) alloy nanoparticles (approximately 1.7 nm) were synthesized on carbon supports through laser irradiation in liquids. This unique method leverages the effective absorption of pulse laser energy by carbon supports to generate high temperatures, enabling the reduction of metallic ions precursors by ethanol molecules and the subsequent formation of alloy nanoparticles. The resulting bimetallic PtNi alloy nanoparticles exhibited significantly improved catalytic performance in the hydrogen evolution reaction (HER).
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Zhiwei Zhao, Zhongliao Wang, Jinfeng Zhang, Chunfeng Shao, Kai Dai, Ke Fan, Changhao Liang
Summary: In this study, an In-O-Cd bond-modulated S-scheme heterojunction of In2O3/CdSe-DETA was synthesized, which accelerated the photogenerated electron transfer. The oxygen vacancies (Vo) of In2O3 were found to have an electron capture effect. The synergistic effect of this structure extracted and rapidly transferred electrons to surface-active sites, improving the electronic coupling of CO2. This research provides new insights into photocatalytic CO2 reduction by precisely adjusting the electron transfer pathway and shortening the electron transfer distance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiahui Hua, Zhongliao Wang, Jinfeng Zhang, Kai Dai, Chunfeng Shao, Ke Fan
Summary: In this work, highly dispersed MOF-BiOBr/Mn0.2Cd0.8S (MOFBiOBr/MCS) S-scheme heterojunctions with high photocatalytic CO2 reduction performance were constructed. The intimate contact between the MCS nano-spheres and the nanosheet-assembled MOF-BiOBr rods, driven by the internal electric field, accelerates the charge transfer along the S-scheme pathway. The optimum MOF-BiOBr/MCS shows excellent activity in CO2 reduction, affording a high CO evolution rate of 60.59 µmol h-1 g-1.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Xiutao Xu, Yue Huang, Kai Dai, Zhongliao Wang, Jinfeng Zhang
Summary: Photocatalytic CO2 reduction based on g-C3N4 with inexpensive, efficient, stable, and suitable energy band structure, serve as a promising candidate for alleviating the greenhouse effect. Herein, porous g-C3N4/CuSe (PCN/CS) Schottky heterojunctions were fabricated to overcome the low CO2 photoreduction performance of g-C3N4. The improved charge separation and reduced reaction energy barrier in PCN/CS contributed to significantly higher CO2 photoreduction efficiency compared to pure PCN and CS.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Jing Wang, Zhongliao Wang, Jinfeng Zhang, Siang-Piao Chai, Kai Dai, Jingxiang Low
Summary: This study explores the modulation of surface-active sites in CdCNS/CdS photocatalyst by employing a non-noble metal cocatalyst NiS, leading to enhanced photocatalytic performance and improved hydrogen production rate.
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)
