Article
Engineering, Chemical
Yuanbo Zhou, Jiaqin He, Dongyun Chen, Xunxun Li, Yaru Wang, Jun Xiao, Najun Li, Qingfeng Xu, Hua Li, Jinghui He, Jianmei Lu
Summary: A series of porous Pt/FexCey microflowers with well-defined mesoporous structure were synthesized through a solvothermal method, promoting gas distribution and even dispersion of active species. Among the samples, 1 wt % Pt/Fe3Ce1 showed the best catalytic performance, with the catalyst composition able to be regulated for improved catalytic efficiency. The synergistic effect of Fe2O3 and CeO2, along with the addition of Pt, enhanced the mobility of lattice oxygen and facilitated toluene removal. The Mars-van Krevelen model was used to explain the mechanism of toluene oxidation over these Fe-based catalysts.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Ruosi Peng, Haozhi Zhang, Yanjie Guo, Weiqing Huang, You Zhang, Junliang Wu, Mingli Fu, Chenglong Yu, Daiqi Ye
Summary: This study investigates the effect of lanthanide doping on the physicochemical properties and catalytic activity of Pt/CeO2 catalysts for toluene oxidation. The results demonstrate a significant impact of lanthanide doping on the catalyst activity, which is closely related to the ion radius and valence state of the dopants. Doping with Gd enhances the catalytic oxidation of toluene over Pt/CeO2 catalyst, possibly by promoting the formation of Gd-Ce complexes and oxygen vacancies.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jialing Wang, Xuefeng Shi, Longwen Chen, Huanyi Li, Mengqi Mao, Guangyi Zhang, Hui Yi, Mingli Fu, Daiqi Ye, Junliang Wu
Summary: The study demonstrated that the supported catalyst of Pt-CeO2/BEA with low loading amount of Pt nanoparticles exhibited competitive activity towards catalytic ozonation of toluene. Enhanced Pt-CeO2 strong metal-support interaction, smaller and more uniform Pt nanoparticles formation, and increased oxygen vacancies and peroxide species were found to potentially contribute to the improved catalytic performance. Plausible reaction pathways for the involving reactions on catalyst surface were proposed based on in-situ Raman analysis.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Menglan Xiao, Dawei Han, Xueqin Yang, Narcisse Tsona Tchinda, Lin Du, Yucong Guo, Yuechang Wei, Xiaolin Yu, Maofa Ge
Summary: This study constructs a Pt/Ni-CeO2 catalyst via Ni doping, which enhances the catalytic performance of toluene and improves water- and SO2-tolerance. The introduction of Ni induces the generation of abundant oxygen vacancies, facilitating the activation of oxygen species, while the formation of Pt-NiO interface structure restrains the adsorption of water and SO2 molecules.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Huihui Shi, Peixin Yang, Lu Huang, Yali Wu, Duohuan Yu, Hangfei Wu, Yunhuai Zhang, Peng Xiao
Summary: A novel single-atom Pt-CeO2/Co3O4 catalyst with ultra-low Pt loading (0.06Pt-SA) was fabricated, showing excellent toluene degradation activity and ultra-long durability. The strong metal-support interaction between single atomic Pt and the carrier contributed to the superior performance of the catalyst by enhancing oxygen activation and toluene removal. This study provides inspiration for the development of low-cost and high-performance VOCs catalyst with noble single-atomic modification strategy.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Qifeng Zhang, Jiyuan Liu, Chen Wang, Yanglong Guo, Wangcheng Zhan, Li Wang, Xueqing Gong, Yun Guo
Summary: Adjusting the interaction between Pt and CeO2 can improve the catalytic performance of supported Pt catalysts in the combustion of chlorinated volatile organic compounds (CVOCs). Weak interactions lead to higher activity, while strong interactions result in lower ability to remove chlorine species.
Article
Chemistry, Physical
Yu Hao, Shaohua Chen, Xueyin Zhang, Tiehong Chen
Summary: Pt-1/CeO2 nanospheres (Pt/CeO2-NS) were synthesized using the bath oiling method with L-asparagine as an additive. The addition of L-asparagine allows CeO2 nanospheres to retain their structure and exhibit stronger interaction with highly dispersed Pt. The toluene catalytic combustion performance of Pt/CeO2-NS was investigated, and it was found that the catalyst exhibited superior activity compared to the commercial CeO2-supported Pt catalyst, which can be attributed to its higher oxygen vacancy and Pt4+ content.
Article
Engineering, Environmental
Ziang Su, Wenzhe Si, Hao Liu, Shangchao Xiong, Xuefeng Chu, Wenhao Yang, Yue Peng, Jianjun Chen, Xingzhong Cao, Junhua Li
Summary: Catalytic combustion is an advanced technology used to eliminate industrial volatile organic compounds. By designing homogeneous interfaces, a mesocrystalline CeO2 catalyst with abundant Ce-Ce homogeneous interfaces was synthesized and showed enhanced catalytic performance for toluene combustion. The abundant Ce-Ce homogeneous interfaces formed by highly ordered stacking and small grain size endow the CeO2 mesocrystal with superior redox property and oxygen storage capacity.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yalong Liu, Sijun Li, Xiangyue Liu, Jing Tang, Wenxuan Quan, Hu Cheng, Zhuo Chen, Xueer Wei, Jinliang Zhuang
Summary: Noble metal-free multicomponent heterostructured nanocomposites with controllable compositions and structures have been successfully synthesized using carbon nanospheres as templates. The Ce0.5Cu0.5O1.5-Mn3O4 catalysts exhibited excellent catalytic activity and long-term stability, achieving complete conversion of toluene at 225 degrees Celsius. The enhanced catalytic activity can be attributed to the highly dispersed metal oxides, partial formation of solid solutions, and ultrathin hollow structures.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Yue Zhang, Cong Wu, Zhiqiang Wang, Jiawei Ji, Haiqin Wan, Weixin Zou, Qing Tong, Jingfang Sun, Lin Dong, Yu-Wen Chen
Summary: Bimetallic Pt-Ir alloy nanoparticles were successfully prepared by a microwave-assisted method and used as catalysts for toluene combustion. The Pt2.5Ir/CeO2 catalyst showed excellent low-temperature catalytic activity, attributed to the interaction between Pt and Ir, richer adsorbed oxygen species, and low-temperature reducibility.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Chemical
Yunrong Zhao, Aijing Ma, Gangguo Zhao, Jianshen Wang, Shaopu Hu, Dan Liu, Alex T. Kuvarega, Bhekie B. Mamba, Jianzhou Gui
Summary: In this study, a uniform acanthosphere-like CeO2 catalyst endowed with porous spikes was designed and prepared, showing outstanding catalytic performance and high thermal stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Yang Zhou, Wei Xi, Zixin Xie, Zhixin You, Xunzhu Jiang, Bing Han, Rui Lang, Chuande Wu
Summary: The study demonstrates the fabrication of high loading Pt single-atom catalysts on diatomite by modifying it with CeO2 nanoparticles to increase defect sites on the support. The enhanced metal-support interaction results in above 1 wt.% loading of Pt species with atomic dispersion, showing good performance in the selective hydrogenation of phenylacetylene to styrene.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Chemistry, Applied
Bing Zhou, Quanli Ke, Meijun Wen, Tianbiao Ying, Guokai Cui, Ying Zhou, Zhenyu Gu, Hanfeng Lu
Summary: CeO2, La2O3, and CeO2-Y2O3 oxides were coated on the surface of Al2O3 through impregnation method and showed improved performance as supports for Pd and Pt catalysts. The doping of rare earth metals increased the adsorption rates of Pd and Pt ions, and the Pt/Ce-Al2O3 and Pt/CeY-Al2O3 catalysts exhibited better degradation performance for toluene compared to Pt/Al2O3 catalyst. XPS characterization confirmed that Pt0 species played an important role in the catalytic oxidation reaction of toluene.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Applied
Shengsheng Chang, Yong Jia, Yiqing Zeng, Fuping Qian, Lina Guo, Shenghua Wu, Jinli Lu, Yunlong Han
Summary: The effect of CeO2 plane exposure on total toluene oxidation was investigated by preparing CeO2 nanorods, nano-octahedrons, and nano-cubes with different plane exposures. The results revealed that the (110) plane of CeO2 was the most beneficial for the dispersion of Pt species, followed by the (111) face. The improved Pt species dispersion enhanced the metal-supports interaction, facilitating the electron transfer and O2 adsorption-activation, thus promoting the total oxidation of toluene.
JOURNAL OF RARE EARTHS
(2022)
Article
Nanoscience & Nanotechnology
Yishui Liu, Mengxi Pei, Huanhuan Liang, Xiaodong Wu, Bo Li, Zhichun Si, Feiyu Kang
Summary: Volatile organic compounds (VOCs) are receiving increased attention due to their impact on air pollution and human health. Researchers have developed a photocatalytic system using few-layer CoAl-LDH as a support for Pt nanoparticles, which are coated on CeO2 nanoparticles. This system forms type II heterojunctions and improves the efficiency of VOC removal. The study provides a useful method for the preparation of high-efficiency photothermal catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Dongxue Guo, Chengxiang Shi, Hui Zhao, Rui Chen, Shaohua Chen, Pingchuan Sun, Tiehong Chen
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Chemistry, Physical
Shaohua Chen, Yu Hao, Rui Chen, Zhipeng Su, Tiehong Chen
Summary: The hollow multishelled spherical PrMnO3 perovskite exhibits high catalytic activity due to its high specific surface area, high molar ratio of Mn4+/Mn3+, improved low-temperature reducibility, and increased content of active oxygen species. Its excellent catalytic performance for CO and toluene oxidation is attributed to the unique structural and compositional characteristics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Jiang He, Zhijie Wu, Qingqing Gu, Yuanshuai Liu, Shengqi Chu, Shaohua Chen, Yafeng Zhang, Bing Yang, Tiehong Chen, Aiqin Wang, Bert M. Weckhuysen, Tao Zhang, Wenhao Luo
Summary: By confining ultra-small Ru metal nanoclusters within the micropores of zeolite Y, the chemical selectivity towards the production of pentanoic biofuels can be significantly enhanced, leading to potential applications in the biomass conversion process. The addition of La element can maintain the activity site intimacy and prevent zeolite lattice deconstruction, thus improving catalyst stability during the HDO process.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Jiangqian Yang, Ying He, Jiang He, Yuanshuai Liu, Huawei Geng, Shaohua Chen, Lu Lin, Meng Liu, Tiehong Chen, Qike Jiang, Bert M. Weckhuysen, Wenhao Luo, Zhijie Wu
Summary: This study successfully encapsulated nanoscale Ru clusters within high-aluminum ZSM-5 zeolite, which is of great significance for the rational design and development of zeolitic bifunctional catalysts.
Review
Engineering, Chemical
Huan Wang, Guo Du, Jiaqing Jia, Shaohua Chen, Zhipeng Su, Rui Chen, Tiehong Chen
Summary: This review comprehensively summarizes the progress in synthetic strategies using carbon materials as templates for hierarchically porous zeolites, discussing both direct and indirect template methods, as well as the encapsulation of metal species. Factors affecting the synthesis of carbon-templated hierarchically porous zeolites are highlighted, aiming to attract interest in cost-effective and large-scale production methodologies for industrial applications.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Physical
Huan Wang, Guo Du, Shaohua Chen, Jiaqing Jia, Pingchuan Sun, Tiehong Chen
Summary: Hierarchically porous xMo/NKM-5 materials with Mo loading of 3 wt% exhibited outstanding oxidative desulfurization activity and excellent adsorptive capacity, making them potential candidates for industrial desulfurization process.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Huan Wang, Guo Du, Shaohua Chen, Zhipeng Su, Pingchuan Sun, Tiehong Chen
Summary: In this study, hierarchical TS-1 single-crystals with enhanced catalytic performance were successfully synthesized, showing great potential in oxidative desulfurization reactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Applied
Jiang He, Lu Lin, Meng Liu, Caixia Miao, Zhijie Wu, Rui Chen, Shaohua Chen, Tiehong Chen, Yang Su, Tao Zhang, Wenhao Luo
Summary: Zeolite-supported metal catalysts with hydrogenation centers and acid sites exhibit excellent stability and performance in the liquid-phase conversion of biomass. The addition of La efficiently modulates the acidity of zeolite, alleviates coke formation, and suppresses zeolite dealumination and metal agglomeration and leaching.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Yu Hao, Shaohua Chen, Xueyin Zhang, Tiehong Chen
Summary: Pt-1/CeO2 nanospheres (Pt/CeO2-NS) were synthesized using the bath oiling method with L-asparagine as an additive. The addition of L-asparagine allows CeO2 nanospheres to retain their structure and exhibit stronger interaction with highly dispersed Pt. The toluene catalytic combustion performance of Pt/CeO2-NS was investigated, and it was found that the catalyst exhibited superior activity compared to the commercial CeO2-supported Pt catalyst, which can be attributed to its higher oxygen vacancy and Pt4+ content.
Article
Engineering, Environmental
Shaohua Chen, Zhipeng Su, Huan Wang, Pingchuan Sun, Tiehong Chen
Summary: Activation of lattice oxygen species in oxides is important for enhancing catalytic oxidation activity. In this study, the lattice distortion of Mn3O4 spinel oxide was tuned by interfacing with amorphous samarium oxides, leading to the activation of lattice oxygen. The optimized catalyst, Sm0.3Mn, exhibited improved intrinsic activity for CO oxidation, as well as enhanced water resistance and SO2 tolerance compared to pristine Mn3O4. The rational modulation of reactive oxygen species in the lattice-distorted Mn3O4 contributed to the improved performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Weiyin Wang, Lu Lin, Haifeng Qi, Wenxiu Cao, Zhi Li, Shaohua Chen, Xiaoxuan Zou, Tiehong Chen, Nanfang Tang, Weiyu Song, Aiqin Wang, Wenhao Luo
Summary: A highly efficient Rh@Al2O3@C single-atom catalyst (SAC) was developed for the hydrogenation of m-chloronitrobenzene, achieving excellent catalytic performance and a sustained selectivity of around 98% to m-chloroaniline. This was attributed to the atomic dispersion of metal and enhanced accessibility of acid function sites.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Luming Wu, Yu Hao, Shaohua Chen, Rui Chen, Pingchuan Sun, Tiehong Chen
Summary: The Au/ReZrO2 catalysts, supported on rare earth metal doped ZrO2, showed enhanced catalytic performance in the liberation of CO-free H-2 from formic acid, attributed to improved metal-support interaction and accelerated decomposition of HCOOH into H-2.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Yu Hao, Shaohua Chen, Huan Wang, Rui Chen, Pingchuan Sun, Tiehong Chen
ACS APPLIED NANO MATERIALS
(2020)
Article
Chemistry, Physical
Shaohua Chen, Hui Li, Yu Hao, Rui Chen, Tiehong Chen
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
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)
