Article
Agricultural Engineering
Zepeng Kang, Zhao Pang, Zhenzhen Zi, Bin Liu, Huanhuan Zhai, Yu Bai, Zhiguang Zhu
Summary: A novel hierarchical porous carbon nanosheet with high N content was prepared by pyrolyzing a spidroin expressed heterologously in engineered Escherichia coli and subsequent KOH activation. The material displayed a large specific surface area and high capacitance, showing promise for energy conversion and storage applications.
BIOMASS & BIOENERGY
(2022)
Article
Materials Science, Multidisciplinary
Kiran P. Shejale, Yogeshwaran Krishnan, Ranjith Kumar Dharman, Yeon Uk Jeong, Sung Yeol Kim
Summary: Multifunctional electrocatalysts with excellent performance are highly desirable for new energy technologies. An electrocatalyst is synthesized using a straightforward two-step approach, whereby ultralow doping (0.06 wt%, Fe) and a heteroatom (N) generate defects. The defect-induced active sites and porous channels enable high catalytic activity and durability for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER).
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Shasha Wang, Junfeng Miao, Mengshuai Liu, Lihui Zhang, Zhenfa Liu
Summary: The novel microporous carbon xerogels (CX-HMTAs) with different morphologies and well-developed porosity were successfully fabricated. The samples exhibited high micropore volume and large specific surface area, which were applied as supercapacitor electrodes and CO2 capture materials. The multifunctional porous carbon materials presented herein were facilely prepared without any activation, exhibiting considerable potentials for large-scale gas adsorption/separation and electrochemical energy storage.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Jingjing Ma, Jisi Li, Ruguang Wang, Yuanyuan Yang, Pengfei Yin, Jing Mao, Tao Ling, Shizhang Qiao
Summary: This study demonstrates the use of an S-doped Fe-N-C catalyst with hierarchical porous architecture as an oxygen reduction reaction (ORR) catalyst in a high-power-density zinc-air battery. The unique structure of the catalyst significantly increases active sites, promotes O-2 transport, and enhances intrinsic activity, leading to superior performance in the assembled zinc-air battery with a super high-power density of 453 mW cm(-2).
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Hao-Yu Wang, Jin-Tao Ren, Chen-Chen Weng, Xian-Wei Lv, Zhong-Yong Yuan
Summary: The study successfully prepared nitrogen and sulfur dual-doped hierarchically porous carbon with trapped Mn species as a non-noble metal-based electrocatalyst, showing excellent catalytic performance and long-term stability, which is of great significance for practical application in energy conversion systems.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Energy & Fuels
Ruijie Li, Zhipeng Shen, Haoyu Zheng, Lu Jin, Yonggang Zhang, Weiyong Yuan, Xuefei Wang
Summary: The translation describes the preparation and properties of nitrogen and oxygen co-doped porous carbon materials, which exhibit high mass-specific capacitance, excellent rate capability, cyclic stability, and high energy density. These porous carbon materials are crucial for energy storage and have potential applications in various fields.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Applied
Chen Chen, Huijuan Han, Xupo Liu, Ye Chen, Dapeng Wu, Zhiyong Gao, Shuyan Gao, Kai Jiang
Summary: The N, P, S tri-doped porous carbon material demonstrates abundant electrochemically active sites and considerable capacitive and electrocatalytic capabilities, providing high energy densities in both acidic and alkaline electrolytes, superior ORR catalytic activity, and high EF degradation efficiency for mixed dyes. This work highlights the versatility of N, P, S tri-doped porous carbon in electrochemical energy storage and pollution treatment.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Shuxian Di, Wenjin Liu, Chen Guo, Fanghui Wang, Anzhela Bulanova, Alexander Mebel, Hong Zhu
Summary: In this study, PtCu bimetallic nanoparticles anchored on hierarchical porous N-doped carbon were successfully fabricated, and it was found that the high surface area and mesopore ratio of N-doped carbon are beneficial for the distribution and mass transfer of PtCu particles. Furthermore, the presence of nitrogen in carbon can improve the catalytic activity by optimizing the oxygen affinity of the catalyst.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Dong-kyu Son, Sooan Bae, Shrine Maria Nithya Jeghan, Gibaek Lee
Summary: Highly efficient and durable FeCo-N,S@CNFs catalysts were synthesized for oxygen reduction reactions. The catalysts showed defect-rich active sites, enhancing the ORR activity, and exhibited long-term stability and high tolerance to methanol. The synergistic interactions between metals and heteroatoms played a crucial role in enhancing the ORR activity. These catalysts can be widely used in battery-based systems and fuel cell applications.
Article
Engineering, Chemical
Miaoran Zhang, Mingxin Zhang, Kanjun Sun, Xuan Xie, Haikuo Lei, Hui Peng, Guofu Ma
Summary: A novel FeP nanoparticles self-embedded P, N-codoped hierarchical porous carbon catalyst (FeP@NPC-90-900) has been successfully synthesized, exhibiting excellent catalytic performance for oxygen reduction reactions (ORR). The catalyst shows high catalytic activity, stability, and good methanol resistance in alkaline media, surpassing the performance of commercial Pt/C catalysts.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Physical
Yuanyuan Guo, Anrui Dong, Qi Huang, Qipeng Li, Yue Hu, Jinjie Qian, Shaoming Huang
Summary: The rational design and preparation of hierarchically porous N-doped carbon nanotubes grafted onto zinc-based coordination polymer derived carbon nanomaterials for efficient oxygen reduction reaction (ORR) catalysis is proposed in this study. The Fe-NCNT catalyst exhibits optimal ORR activity with high onset potential, half-wave potential, and diffusion-limited current density, showcasing potential for high-performance Zn-air batteries. This method demonstrates a new route for the facile construction of efficient nanocatalysts for advanced energy applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Applied
Xinghua Cao, Zicong Yang, Yao Chen, Ziyan Pu, Kangyao Wang, Di Liu, Yueming Li
Summary: This study developed sustainable pollen derived three-dimensional porous carbon/graphene composites with Zn and N doping as non-precious catalysts for oxygen reduction reaction. The optimized sample showed excellent electrocatalytic performance and stability in alkaline and acid electrolytes.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Chemistry, Physical
Kexin Huang, Jia Li, Miaolan Sun, Zhongyun Yang, Youjun Fan, Xuechun Du, Wei Chen, Jun Yang
Summary: This study reported the preparation of an efficient and stable Co-N-S-PC catalyst using PEDOT/ZIF-67 as a precursor, which exhibited outstanding activity and high stability for oxygen reduction reaction. The catalyst showed insensitivity to methanol and maintained excellent performance in long-term stability testing.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Hua-Jie Niu, Shi-Yi Lin, Yu-Ping Chen, Jiu-Ju Feng, Qian-Li Zhang, Ai-Jun Wang
Summary: This study prepared hydrogel derived FeCo/FeCoP embedded in N, P-doped three-dimensional porous carbon framework (FeCo/FeCoP@NP-CF) through high-temperature pyrolysis and acid-etching. The resultant FeCo/FeCoP@NP-CF showed remarkable oxygen reduction reaction (ORR) characteristics, offering valuable guidelines for synthesis of non-noble metal catalysts in energy technologies.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Satpal Singh Sekhon, Jin-Soo Park
Summary: The research on biomass-derived PCNs and their nitrogen doping is crucial for energy conversion, and innovative green methods can improve the production efficiency and sustainability of PCNs, as well as explore suitable preparation methods in different biomasses.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Hongying Quan, Weiliang Zeng, Menghua Pan, Yuqi Xu, Dezhi Chen, Junfei Liang
Summary: The study demonstrates a simple and practical in-situ one-pot approach for the fabrication of α-Fe2O3@reduced graphene oxide core-shell nanocomposites, allowing for fine tuning of nanocrystal shape and rGO thickness by controlling the amounts of hydrazine hydrate and graphene oxide in the reaction system, leading to enhanced lithium storage performance.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Changqin Cheng, Zhiyong Li, Min Zhang, Dezhi Chen
Summary: The study demonstrated that Jateorhizine can reduce glucose production and promote glucose uptake, making it a potential candidate for insulin resistance therapy.
JOURNAL OF RECEPTORS AND SIGNAL TRANSDUCTION
(2021)
Article
Chemistry, Physical
Weiliang Zeng, Hongying Quan, Jiangyan Meng, Wei Wei, Meng Liu, Dezhi Chen
Summary: By utilizing N2-plasma treatment, a high mass loading N-MnO2 electrode was successfully prepared, showing excellent capacitive performance and cycling stability. Under 20 mA cm-2, it exhibited capacitance retention rates of 71.8% and 96% respectively.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yi Hu, Hongying Quan, Jingmiao Cui, Wansheng Luo, Weiliang Zeng, Dezhi Chen
Summary: The nanocarbons-modified N, O doped hierarchical porous carbons exhibited superior capacitance performance and cycle stability, with carbon dots (CD) modification showing the best results. Utilizing CD for regulating and improving the internal structure of traditional porous carbon materials led to better electrochemical energy storage performance compared to carbon nanotubes and graphene oxide.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Yi Hu, Dezhi Chen, Rui Zhang, Yuan Ding, Zhong Ren, Maosheng Fu, Xiukun Cao, Guisheng Zeng
Summary: The study demonstrates that the pyrolysis temperature can influence the efficiency of passion fruit shell derived biochar (PFSC) for activating peroxymonosulfate (PMS) to degrade tetracycline hydrochloride (TC), with the PFSC-900/PMS system showing high catalytic performance mainly due to the non-free radical reaction pathway. This research not only showcases biochar as an efficient catalyst for PMS activation, but also provides a value-added reuse pathway for passion fruit shells.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Yi Hu, Dezhi Chen, Shoujun Wang, Rui Zhang, Yichuan Wang, Meng Liu
Summary: N-doped porous carbons (NPCs) were prepared and used to activate peroxymonosulfate (PMS) to degrade organic pollutants in water, showing excellent degradation performance and stability. This study provides a promising metal-free catalyst for organic pollutant removal and promotes sustainable development of carbon-based materials.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Wansheng Luo, Hongying Quan, Zhixia Zhang, Yunying Wang, Xiaolin Xie, Zhen Hong, Dezhi Chen
Summary: The study successfully fabricated a scalable CQD-based film on N-2 plasma-treated carbon cloth using electrodeposition method. After electrochemical activation, the film exhibited enhanced capacitance activity, making it suitable for supercapacitor applications with good cycle stability.
ACS APPLIED NANO MATERIALS
(2021)
Article
Engineering, Chemical
Shoujun Wang, Dezhi Chen, Zhi-Xia Zhang, Yi Hu, Hongying Quan
Summary: N-doped hierarchically porous carbons with excellent adsorption capacity and fast ion transport capability were prepared and used as CDI electrode materials for efficient removal of heavy metal pollutants from water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Wansheng Luo, Wenchao Chen, Hongying Quan, Zhi-Xia Zhang, Yong Zeng, Yunying Wang, Dezhi Chen
Summary: In this study, carbon quantum dots (CQDs) were implanted into NiCo-LDHs nanosheets to construct a carbon quantum dots/NiCo-LDHs heterostructure electrode. This design improved the conductivity and morphological stability of the electrode, leading to enhanced capacitance performance and cycle life. The research provides a new opportunity for the development of high-performance nanocomposites for flexible supercapacitor electrodes.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Jingmiao Cui, Zhi-Xia Zhang, Hongying Quan, Yi Hu, Shoujun Wang, Dezhi Chen
Summary: Biomass-derived hierarchical porous carbons (BHPCs) with excellent properties were prepared using camellia husk as a precursor and KOH activation assisted by ammonium salts. The (NH4)(3)PO4 assisted KOH activated BHPCs showed the highest specific capacitance and energy density, as well as good cycling stability, making them promising electrode materials for high-performance supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Hongying Quan, Wenhao Tao, Yan Wang, Dezhi Chen
Summary: This study reports a facile strategy to improve the capacitive behavior of biomass-derived porous carbons by introducing highly graphitized carbon quantum dots (CQDs) into their structure. The resulting CQDs/HPC composites exhibit a well-developed porous structure, improved charge/ion transfer kinetics, and high capacitance and rate capability. Moreover, these composites also show high long-term stability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Environmental
Yichuan Wang, Yingping Tong, Dezhi Chen, Tianlin Zhou, Quanzhi Zhang, Jian-Ping Zou
Summary: In this study, g-C3N4 modified e-MnO2 composites were synthesized and found to exhibit high catalytic performance in peroxymonosulfate (PMS) activation for the degradation of acid orange 7. The interaction between PMS and e-MnO2 and electron transfer to PMS in the redox cycle of Mn(II), Mn(III), and Mn(IV) were identified as the possible degradation mechanisms. This work provides insight into the promotion of efficient MnO2 catalysts in PMS activation for the degradation of organic pollutants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Wenchao Chen, Hongying Quan, Dezhi Chen
Summary: Flexible energy storage devices have attracted attention due to their portability and practicality. However, the decay of capacitance and short cycle life limit their development. In this study, a simple electrodeposition method was used to enhance the electro-chemical activity and structural stability of NiCoLDH nanosheet arrays on carbon cloth (CC) by introducing carbon quantum dots (CQD). The modified electrode (CQD/ NiCoLDH@CC) exhibited improved electrochemical capacity and cycle life due to the effect of CQD. The resulting aqueous asymmetric supercapacitor showed high energy density and power density, indicating the potential of this approach for energy storage.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Chemical
Rui Zhang, Zhi-Xia Zhang, Fang Wang, Dezhi Chen
Summary: In this study, Camellia oleifera shell-derived biochar (COSB) was prepared by one-step pyrolysis. The catalytic efficiency of COSB was found to be tunable by the pyrolysis temperature, with COSB-1000 prepared at 1000 degrees C showing the optimal activity in peroxymonosulfate (PMS) activation. The COSB-1000/PMS system exhibited good anti-interference ability and wide pH applicability, and the degradation of tetracycline hydrochloride (TC) was mainly dominated by the non-radical oxidation process, with the generated O-1(2) playing a vital role.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Engineering, Environmental
Yawen Yu, Dezhi Chen, Shasha Xie, Qing Sun, Zhi-Xia Zhang, Guisheng Zeng
Summary: Metal-organic frameworks (MOFs)-derived nanoporous carbons are promising adsorbents for removing endocrine-disrupting chemicals (EDCs) from water. In this study, two nanoporous carbons derived from different Zn-MOFs were prepared and evaluated for their adsorption performance. The MOF-5-derived nanoporous carbon showed higher adsorption capacity and faster adsorption rate, and the adsorption mechanism was mainly attributed to hydrophobic interaction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
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)