Article
Chemistry, Physical
Xu Meng, Xuemeng Zhang, Justin Rageloa, Zigeng Liu, Wei Wang
Summary: In this study, a novel Fe-Nx catalyst with one-dimensional fiber structure was prepared using electrospinning technology. The catalyst exhibited high-density Fe-Nx sites, leading to improved catalytic activity for the oxygen reduction reaction. The performance evaluation showed that the catalyst achieved a higher half-wave potential compared to the commercial Pt/C electrode. The assembled aluminum-air battery demonstrated high open potential and maximum power, highlighting the potential of this electrospinning method for Fe-N-C catalyst preparation.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yuepeng Liu, Zhongfang Li, Likai Wang, Lei Zhang, Xueliang Niu
Summary: In this study, Fe/N co-doped three-dimensional porous graphene was successfully prepared via a template method and showed promising potential as bifunctional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction. The catalyst exhibited pH-independent ORR activity and low OER overpotential in alkaline electrolyte, leading to excellent performance in Zn-air batteries.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yanan Zhang, Jiangbo Wang, Mensah Alfred, Pengfei Lv, Bing Liu, Qufu Wei
Summary: In this study, a novel Co-Nx-enriched electrospun porous carbon nanofibrous bifunctional electrocatalyst was successfully prepared and demonstrated outstanding catalytic activity and stability in both oxygen reduction reaction and oxygen evolution reaction. Furthermore, flexible zinc-air batteries assembled with this catalyst exhibited excellent performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Xiangyu Lu, Hao Xu, Peixia Yang, Lihui Xiao, Yaqiang Li, Jingyuan Ma, Ruopeng Li, Lilai Liu, Anmin Liu, Veniamin Kondratiev, Oleg Levin, Jinqiu Zhang, Maozhong An
Summary: A zinc-assisted MgO template strategy is used to construct porous carbon-supported Fe-N4 catalysts, which exhibit high ORR performance and stability. The Fe-N4 sites lower the energy barrier for ORR, and the porous structure accelerates the diffusion of O2, making Fe-N-C a promising catalyst for Zn-air batteries.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
H. L. Zhao, S. Wu, C. Y. Liu, X. T. Yan, X. Xu, S. S. Fu, Y. B. Wang, Q. Su, X. Wang, Q. L. Yang
Summary: A highly active non-precious oxygen reduction catalyst was developed by doping different metals and forming bimetallic active sites. The catalyst showed excellent ORR catalytic activity and stability.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Tianyu Zhu, Yanying Lu, Kevin Huang, Chuanbing Tang
Summary: Solid-electrolyte-based rechargeable metal-ion batteries show great potential, and SME-based Zn-metal alkaline batteries significantly improve cycling performance by suppressing electrolyte depletion and anode passivation under harsh testing conditions.
ACS MATERIALS LETTERS
(2021)
Article
Chemistry, Physical
Yang Wang, Ye Chen, Ziwei Wang, Ping Li, Jianyun Zhao, Hongyang Zhao, Dan Li, Tianxi He, Yuantao Wei, Yaqiong Su, Chunhui Xiao
Summary: Developing non-precious metal-based catalysts is crucial for energy devices. In this study, Fe, B, and N doped nanoflake-like carbon materials were synthesized and applied as catalysts for oxygen reduction reaction (ORR). The as-synthesized catalyst exhibits excellent ORR activity and long-term stability in alkaline and acidic media, surpassing the performance of commercial Pt/C catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Cheng Chen, Zi-Jun Tang, Jia-Yi Li, Cong-Yi Du, Ting Ouyang, Kang Xiao, Zhao-Qing Liu
Summary: In situ growing transition metals on N-doped carbon by atomic doping presents a potential alternative to replace Pt-based catalysts for redox reactions. This study presents a simple synthetic strategy to fabricate a highly active and durable MnO modifying Co-N-x/C catalyst. The interphase engineering effectively controls the composition of the material, and the interaction between Co-N-x and MnO phase is also discussed. The resulting catalyst exhibits excellent electrocatalytic properties and durability in acidic and basic solutions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Applied
Lingbo Zong, Xin Chen, Siliang Liu, Kaicai Fan, Shuming Dou, Jie Xu, Xiaoxian Zhao, Wenjun Zhang, Yaowen Zhang, Weicui Wu, Fenghong Lu, Lixiu Cui, Xiaofei Jia, Qi Zhang, Yu Yang, Jian Zhao, Xia Li, Yida Deng, Yanan Chen, Lei Wang
Summary: This study introduces a cost-efficient two-step pyrolysis strategy for the fabrication of a bifunctional oxygen electrocatalyst, Fe/Fe3C@Fe-N-x-C, with highly curved carbon surfaces and abundant Fe-N-x active sites, exhibiting superb electrochemical activity for ORR and OER. The constructed Zn-air battery shows exceptional performance with a peak power density of about 147 mW cm(-2), outstanding cycling stability, and a small voltage gap of 0.87 V, highlighting the potential for efficient air batteries.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Fengxian Zhang, Xupo Liu, Ye Chen, Miao Tian, Tianfang Yang, Jing Zhang, Shuyan Gao
Summary: In this study, a ligand-assisted strategy was used to prepare Fe, N co-doped ordered mesoporous carbon fiber bundles, which exhibit high-density Fe-NX sites and improved oxygen reduction reaction (ORR) performance. These carbon fiber bundles serve as high-performance electrocatalysts for rechargeable Zn-air batteries (ZABs).
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Zhongxi Zhao, Wentao Yu, Wenxu Shang, Yi He, Yanyi Ma, Zhuojun Zhang, Peng Tan
Summary: This study presents a rigorous assessment of the electrochemical rechargeability of Zn-air batteries (ZABs), focusing on the evaluation of polarization testing, cycling stability tests, and differential electrochemical mass spectrometry. The results demonstrate that stable voltage profiles may mask critical information indicating effective charging, and electrolyte changes may be overlooked. These findings provide important guidelines for realizing the electrochemical rechargeability of air-based batteries, including ZABs.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Xiaogang Fu, Gaopeng Jiang, Guobin Wen, Rui Gao, Shuang Li, Matthew Li, Jianbing Zhu, Yun Zheng, Zhaoqiang Li, Yongfeng Hu, Lin Yang, Zhengyu Bai, Aiping Yu, Zhongwei Chen
Summary: A new catalyst with single atomic iron modified nitrogen-doped carbons has been developed using a synergistic polymer-silicon dual templates strategy, resulting in dense and accessible active sites that exhibit better oxygen reduction reaction activity and stability than commercial platinum catalysts. This material shows excellent performance in an aluminum-air flow battery.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Junchao Ding, Hairong Xue, Rui Xiao, Yunyun Xu, Li Song, Hao Gong, Xiaoli Fan, Kun Chang, Xianli Huang, Tao Wang, Jianping He
Summary: This study proposes a metal-organic-framework-derived Fe-N-C electrocatalyst for Li-CO2 batteries, which exhibits high specific capacity, good rate capability, and excellent cyclability. The electrocatalyst is formed by a host-guest chemistry strategy and has abundant active sites and a unique three-dimensional structure.
Article
Chemistry, Multidisciplinary
Tianran Zhang, Shengliang Zhang, LanLan Li, Yuxiang Hu, Xiangfeng Liu, Jim Yang Lee
Summary: In this study, a self-decoupling strategy was proposed to improve the stability of bifunctional catalysts in zinc-air batteries. A smart interface with a resistance-switchable sulfonic acid doped polyaniline nanoarray interlayer was constructed in the bifunctional air electrode, allowing the spontaneous electrochemical decoupling of the bifunctional catalyst for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), respectively. This resulted in a mild-acidic zinc-air battery with stable cyclic performances, negligible energy efficiency loss, and a significantly longer cycle life compared to conventional zinc-air batteries.
Article
Chemistry, Multidisciplinary
Yanan Pan, Qi Yang, Fan Qiu, Xiaoying Liu, Chenyu Shen, Yang Fan, Haiou Song, Shupeng Zhang
Summary: A nitrogen and sulfur co-doped FeS/FeN-NC-X4 catalyst embedded in a hollow porous carbon shell is designed for enhanced oxygen reduction reaction (ORR) and high-performance zinc-air batteries.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mengting Xia, Bingjie Chen, Feng Gu, Lianhai Zu, Mengzhu Xu, Yutong Feng, Zhijun Wang, Haijiao Zhang, Chi Zhang, Jinhu Yang
Article
Chemistry, Physical
Qiaoqiao Gui, Yutong Feng, Bingjie Chen, Feng Gu, Lu Chen, Shuo Meng, Mengzhu Xu, Mengting Xia, Chi Zhang, Jinhu Yang
Summary: The NiCoPS3/NC electrode designed with a nanocube-like morphology exhibits superior comprehensive lithium storage performance, including high reversible capacity, excellent cycling stability, and good rate capability, representing the best comprehensive battery performance in MPS3-based anodes to date.
ADVANCED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Mengzhu Xu, Yutong Feng, Bingjie Chen, Ruijin Meng, Mengting Xia, Feng Gu, Donglei Yang, Chi Zhang, Jinhu Yang
Summary: The study demonstrates that black phosphorus nanosheets (BPNSs) with an ultrathin metal-organic-framework (MOF) interphase layer exhibit regulated potassium storage behavior for high-performance potassium-ion capacitors (KICs). The protective MOF interphase layer with ordered pores and high chemical/mechanical stability facilitates K ion diffusion and accommodates electrode volume change, leading to improved reaction kinetics and enhanced cycle stability. The BPNS@MOF electrode as KIC anodes demonstrates outstanding cycle performance exceeding that of most current KICs.
NANO-MICRO LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Yutong Feng, Mengzhu Xu, Ting He, Bingjie Chen, Feng Gu, Lianhai Zu, Ruijin Meng, Jinhu Yang
Summary: The CoPSe/NC material prepared in this study is an excellent anode material for sodium/potassium-ion batteries, with ultra stability and high rate characteristics, higher theoretical capacity and lower discharge voltage compared to CoSe2. Its outstanding performance is verified through a series of characterizations and calculations.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yu Wu, Aiping Lin, Jidi Zhang, Danjiao Zhao, Xiaojing Bai, Cheng Lu, Shufen Wang, Lanlan Fan, Lei Cao, Sida Liu, Feng Gu
Summary: This study successfully synthesized MXene nanospheres with crumpled and eccentric structures by modulating the migration and assembly of MXene nanosheets. The use of interdigital microelectrodes with this structure demonstrated competitive electrochemical performance. The research also highlighted the great potential of aerosol jet printing technique for developing functional devices.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ting He, Jiajia Ru, Yutong Feng, Dapeng Bi, Jiansheng Zhang, Feng Gu, Chi Zhang, Jinhu Yang
Summary: The MoS2/C hollow spheres fabricated via a novel templated spherical coassembly strategy demonstrate excellent performance as a sulfur host material, with advantages including maximizing sulfur utilization, suppressing electrolyte shuttling effect, improving ionic transport, cycling stability, and rate capability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yu Wu, Danjiao Zhao, Jidi Zhang, Aiping Lin, Yu Wang, Lei Cao, Shufen Wang, Shixian Xiong, Feng Gu
Summary: This study utilized aerosol jet printing technology to achieve in situ curling and alignment of MXene, leading to the development of microelectrodes with excellent areal capacitance performance. This technique holds promise for revolutionizing additive manufacturing methods for future smart microelectronics and devices.
Article
Nanoscience & Nanotechnology
Lei Cao, Yu Wang, Qian Zhu, Lanlan Fan, Yu Wu, Zhenhuan Li, Shixian Xiong, Feng Gu
Summary: In this study, a high-performance non-noble metal bifunctional oxygen reduction and evolution reaction electrocatalyst, BCN/rGO-Co, was successfully prepared by embedding Co/Co-N/Co-O onto reduced graphene oxide (rGO) hybrid boron and nitrogen codoped carbon (BCN) nanotube arrays. The material exhibited superior bifunctional oxygen catalytic activity, high power density, and long cycle stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Green & Sustainable Science & Technology
L. Fan, L. Cao, S. Xiang, Y. Wu, Z. Li, F. Gu
Summary: Researchers have prepared novel nanobelts as advanced cathode materials for aqueous Zn ion batteries via a simple solution impregnation method. The materials exhibit superior electrochemical performances and stable cycling properties, shedding light on the design of practical aqueous Zn ion batteries.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Materials Science, Multidisciplinary
Danjiao Zhao, Yu Wu, Aiping Lin, Jidi Zhang, Cheng Lu, Xiaojing Bai, Shufen Wang, Lanlan Fan, Lei Cao, Sida Liu, Feng Gu
Summary: This study presents an innovative approach of aerosol jet printing to fabricate a 3D network of silver nanorod-nanoparticle hybrids. The resulting network is used as a flexible microelectrode for planar micro-supercapacitor devices, demonstrating competitive areal capacitance performance.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yu Wu, Aiping Lin, Jidi Zhang, Danjiao Zhao, Lanlan Fan, Cheng Lu, Shufen Wang, Lei Cao, Feng Gu
Summary: Hybrid Ti3C2Tx/C nanospheres with increased interlayer spacing have been synthesized using aerosol jet printing technology, effectively blocking the restacking of MXene nanosheets. The resulting planar microsupercapacitor devices exhibit exceptional capacitance performance. This concept offers a straightforward and effective method for constructing high-performance energy storage devices.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yang Zhang, Danjiao Zhao, Lei Cao, Lanlan Fan, Aiping Lin, Shufen Wang, Feng Gu, Aibing Yu
Summary: Flexible strain sensors are crucial for public healthcare as they can noninvasively monitor vital health signals. In this study, we developed structurally integrated 3D conductive networks-based flexible strain sensors using a droplet-based aerosol jet printing process and a transfer process. The sensors showed enhanced conduction and mechanical properties during stretching, and demonstrated effective responses to human movements such as finger bending and arm bending. Our findings highlight the potential of droplet-based aerosol jet printing for advanced flexible devices in optoelectronics and wearable electronics applications.
Article
Engineering, Manufacturing
Aiping Lin, Yang Zhang, Danjiao Zhao, Yu Wu, Shufen Wang, Jianmin Li, Lanlan Fan, Shixian Xiong, Lei Cao, Feng Gu
Summary: Flexible techniques for producing high-resolution and moderate efficiency luminescent patterns at the microscale have potential importance for various applications. An innovative droplet-based aerosol jet printing procedure has been developed for creating brightly luminescent patterns of europium-doped yttrium oxide (Y2O3:Eu3+) inorganic phosphors at a low calcining temperature. The procedure synchronized droplet deposition behavior and microreactions to effectively create microscale luminescent patterns. The printed patterns exhibited red emission similar to those calcined at 1000 degrees C, suggesting future applications in flat panel display systems.
ADDITIVE MANUFACTURING
(2023)
Editorial Material
Chemistry, Multidisciplinary
Shiyong Zhao, Hailong Wang, Andreas Ruediger, Feng Gu, Dongliang Yan, Jinlin Lu
FRONTIERS IN CHEMISTRY
(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)
