Article
Chemistry, Physical
M. Oubakalla, M. Beraich, M. Taibi, H. Majdoubi, Y. Aichi, A. Guenbour, A. Bellaouchou, F. Bentiss, A. Zarrouk, M. Fahoume
Summary: In this study, stoichiometric CuSbS2 and Cu12Sb4S13 thin films were elaborated on FTO substrates using co-electrodeposition. The samples were analyzed by various techniques, revealing a change in the phases formed as the copper concentration increased.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
K. A. Urazov, V. I. Yaskevich, B. E. Myrzabekov
Summary: This study investigates the electrochemical reduction of copper, zinc, tin, and selenium ions in a tartaric acid electrolyte. Cu2ZnSnSe4 thin films were produced and their characteristics, such as surface roughness and photoactivity, were studied.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Crystallography
Hui Li, Yutian Fu, Jinglong Liang, Le Wang, Hongyan Yan, Linfei Zhao
Summary: The study focuses on the recovery and utilization of zinc resources in zinc suboxide using electrochemical methods, achieving comprehensive utilization of zinc immersion night and new resources.
Article
Materials Science, Ceramics
V. V. Deshmukh, H. P. Nagaswarupa, N. Raghavendra
Summary: Transition metal ferrites play crucial roles in modern technology, with Co-doped MnFe2O4 nanomaterials showing promising super capacitive behavior for energy storage applications. Specifically, 2 wt% Co-doped MnFe2O4 exhibits the highest capacitance among the tested samples.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
Alassane Sorgho, El Amine Mernissi Cherigui, Moussa Bougouma, Fadi Kamal Aldibaja, Bernard Nisol, Francois Reniers, Claudine Buess-Herman, Thomas Doneux
Summary: The electrodeposition of copper-selenium binary compounds on a gold electrode is investigated in ChCl-U deep eutectic solvent. The formation of Cu2Se is observed through cyclic voltammetry and potentiostatic deposition followed by stripping voltammetries, and is supported by X-Ray Photoelectron Spectroscopy. The electrochemical stability domain of the compound is limited by the oxidation of Se(0) and reduction of Cu(0). Copper is kinetically favored in the co-deposition process, and requires longer deposition times or more negative potentials to avoid pure copper deposition.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Chemical
Sepideh Niazi, Espen Olsen, Heidi S. Nygard
Summary: This study investigated the use of electrodeposition to remove impurities from molten salt. The results showed that Cu and Fe(III) can be completely removed in a relatively short time, but the removal of Fe(II) and Mn was less effective with some impurities remaining.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Electrochemistry
A. Ait-karra, O. Zakir, A. Ait Baha, M. Lasri, R. Idouhli, M. Elyaagoubi, A. Abouelfida, M. Khadiri, J. Benzakour
Summary: Copper sulfide (CuS) thin film was electrodeposited onto stainless steel (SS 316L) substrate under pulse potential control from an aqueous acidic solution. The obtained thin film was identified as a hexagonal covellite CuS using various characterization techniques. Controversial results were obtained from electrochemical impedance spectroscopy (EIS) and Mott-Schottky (MS) analysis due to the involvement of the SS 316 L substrate.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Chemistry, Analytical
Kayo Santana Barros, Andre Luiz Vargas Machado, Vicente Schaeffer Vielmo, Svetlozar Velizarov, Jane Zoppas Ferreira, Valentin Perez-Herranz, Andrea Moura Bernardes
Summary: A novel membrane electrolysis system with a cation-exchange membrane was proposed to extract Sb and Bi ions from elution solution. The cyclic voltammetric study evaluated the influence of important operating parameters on the process performance, showing that the simultaneous presence of the metals alters their electrodeposition and oxidation pattern.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Energy & Fuels
Rania Afia Nuamah, Saleema Noormohammed, Dilip Kumar Sarkar
Summary: High capacitance Co-Co3O4 nanocomposite thin films were successfully synthesized using different electrodeposition modes, characterized by various techniques to obtain capacitance values and cycling performance, demonstrating their potential as high-performance supercapacitor electrodes.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Payal Chauhan, Alkesh B. Patel, Som Narayan, Jyoti Prasad, C. K. Sumesh, G. K. Solanki, K. D. Patel, Saurabh S. Soni, P. K. Jha, V. M. Pathak, Vikas Patel
Summary: Substitutional doping of transition metal Cr into CdSe host lattice can enhance the photoelectrochemical performance of CdSe thin films, with an optimal level of 0.2 M Cr doping leading to approximately a 3-fold increase in photocurrent density and responsivity compared to pure CdSe thin film.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Nilesh S. Dumore, Mausumi Mukhopadhyay
Summary: The PtNPs-SeNPs-FTO nanocomposites, developed as an electrochemical sensor via electrochemical deposition method, were used for hydrogen peroxide detection. Morphological and structural studies confirmed the synthesis and growth of the nanocomposites on FTO substrate. The synthesized PtNPs and SeNPs showed nano-flower and spherical morphology, respectively. The nanocomposites exhibited a wide range of linear concentration response and fast response time, with high selectivity towards hydrogen peroxide.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
M. Oubakalla, M. Bouachri, M. Beraich, M. Taibi, A. Guenbour, A. Bellaouchou, F. Bentiss, A. Zarrouk, M. Fahoume
Summary: The synthesis of Cu3BiS3 thin films by co-electrodeposition was optimized and analyzed. It was found that the structure, morphology, and optical properties of Cu3BiS3 varied under different potential conditions.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Akshay Bhujbal, K. A. Venkatesan, Bhalchandra M. Bhanage
Summary: A new protic ionic liquid [HmPip][OTf] was successfully synthesized and used for aluminum electrodeposition, resulting in bright aluminum deposits. The findings indicate the potential application of this new liquid in the field of aluminum electrodeposition.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Min Hee Joo, So Jeong Park, Sung-Min Hong, Choong Kyun Rhee, Youngku Sohn
Summary: In this study, a large dataset of lanthanide (III) ions' electrochemical behaviors and electrodeposition on bare and terpyridine-functionalized Ti sheets was established. The experimental results demonstrated that the electrodeposited lanthanide materials were similar lanthanide complexes, which could be valuable for understanding lanthanide ions' electrochemical behaviors and improving recovery methods.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Energy & Fuels
Rania Afia Nuamah, Saleema Noormohammed, Dilip Kumar Sarkar
Summary: A nanostructured Ag-decorated Co-Co3O4 composite thin film synthesized on nickel foam using cyclic voltammetry and pulse reverse potential electrodeposition modes exhibited higher specific capacitance and its retention. The presence of nanostructured Ag in the composite film enhanced the ionic and electronic conductivity of the material, resulting in higher specific capacitance values. Morphology analysis, energy-dispersive X-ray spectroscopy, attenuated total reflection-Fourier transform infrared spectroscopy, and X-ray diffraction spectra all confirmed the improved electrochemical properties of the composite thin film.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Ahmed Abdel-Salam, Sayed Y. Attia, Fouad El-Hosiny, M. A. Sadek, Saad G. Mohamed, M. M. Rashad
Summary: Sb(OH)3 is successfully synthesized via a simple hydrothermal method as a high-performance catalyst for organic reactions, addressing the issues of high cost and poor environmental friendliness in traditional synthesis methods.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Ahmed Mourtada Elseman, M. M. Rashad
Summary: Apart from perovskite crystallization, the hole transport layer (HTL) plays a significant role in regulating charge transportation for inverted perovskite solar cells (PSCs). In this study, effective p-i-n PSCs based on a solid solution-coating of Kesterite Cu2ZnSnS4 (CZTS) as HTL were demonstrated in both air and nitrogen environments. The CZTS-HTL based on N-2 annealing achieved higher hole extraction efficiency and a substantial improvement in power conversion efficiency (PCE) compared to air-annealed devices.
Article
Chemistry, Multidisciplinary
Ahmed M. Elseman, Ahmed S. Radwan, Mohamed M. Makhlouf, Mohamed M. Rashad
Summary: The synthesis of three new 3-arylazo-thieno[3,2-b]pyranone dyes, their physical, chemical and optoelectronic properties, including optical and thermal characteristics, have been studied. The results suggest that these dyes could be strong candidates for p-type semiconductors and have potential applications in solar cells and light-harvesting.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
H. G. Abd-Elbaky, M. Rasly, Reem G. Deghadi, Gehad G. Mohamed, M. M. Rashad
Summary: In recent years, the eco-friendly strong-base free synthesis has been applied to the synthesis of spinel cobalt ferrites, leading to successful preparation of the ferrites. By adjusting the composition and structure, the magnetic and optical properties of the cobalt ferrites were controlled, providing a feasible approach for magneto-optical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Ahmed I. Abdel-Salam, Sayed Y. Attia, Saad G. Mohamed, Fouad I. El-Hosiny, M. A. Sadek, M. M. Rashad
Summary: The purpose of this study is to improve the electrochemical performance of supercapacitors by designing and exploring novel active electrode materials. A hierarchical structure of nickel-cobalt-sulfide nanostructures (NiCo2S4) decorated on electrospun N-doped carbon nanofiber (CNF), called NiCo2S4@CNF, was fabricated using a one-step hydrothermal approach. The NiCo2S4@CNF hierarchical structure exhibited a large surface area and high porosity, serving as ion diffusion channels, resulting in high specific capacitance and specific capacity values. The NiCo2S4@CNF//CNF hybrid supercapacitor demonstrated superior energy density and stability, making it a promising electrode material for supercapacitor applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Analytical
Ahmed Mohamed Ibrahim, Fatehy M. Abdel-Haleem, Azza Salah, Mahmoud S. Rizk, Samir A. Abdel-Latif, Ali Omar Turky, Mohamed M. Rashad, Ahmed Barhoum
Summary: In this study, a potentiometric sensor based on carbon paste electrodes was developed for the determination of salicylates in pharmaceutical formulations and biofluids. The sensor showed high sensitivity, fast response time, low detection limit, good selectivity, and stability.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Amal G. Mahdy, Abeer A. Emam, E. A. Mussa, A. Y. Abdel-All, M. M. Rashad, Aya M. Abuelftooh, Saad G. Mohamed
Summary: The nanoscale Li2Mn0.8Ni0.2SiO4/MnO2 composite was successfully synthesized via a two-step method, involving the preparation of MnO2 nanoparticles and the synthesis of Li2Mn0.8Ni0.2SiO4 using an EDTA-assisted sol-gel method. The nanocomposite exhibited an orthorhombic crystal structure with a Pmn2(1) space group and mesoporous properties. The electrode showed excellent electrochemical performance, making it a promising candidate for high-efficiency energy storage electrode materials.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Alaa E. Abd El-Samad, Nasr Gad, Mostafa El-Aasser, Mohamed M. Rashad, Ahmed Mourtada Elseman
Summary: This study utilized the ball milling method to fabricate less toxic and high-quality lead halide perovskite materials. Zinc doping decreased the bandgap energy and improved the material properties. Meanwhile, simulation research found that cobalt-doped materials had higher photovoltaic conversion efficiency. The work highlighted the potential of new perovskite semiconductors in creating novel nanostructured superior materials.
Article
Engineering, Chemical
Hesham A. Hassan, Ali Omar Turky, Ali M. Hassan, Hosni A. G. Ahmed, Mohmed. M. Rashad
Summary: Titanium-substituted lanthanum strontium manganite (LSMO) nanoparticles with titanium ratios of 0.1, 0.2, 0.3, 0.4, and 0.5 were prepared using an organic acid precursor pathway. The insertion of titanium led to an increase in crystallite size, change in optical properties, and an increase in band gap energy. The refractive index, however, slightly decreased with increased titanium concentration.
PARTICULATE SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mohamed A. Nawwar, Magdy S. Abo Ghazala, Lobna M. Sharaf El-Deen, Badawi Anis, Abdelhamid El-Shaer, Ahmed Mourtada Elseman, Mohamed M. Rashad, Abd El-hady B. Kashyout
Summary: GeSn compounds have been widely studied in photodetectors due to their detection limit in the NIR and mid-IR region. In this article, p-i-n structures based on GeSn junctions were fabricated and the impact of As and Sn doping on the strain characteristics of GeSn was studied. The direct transitions and tuning of their band energies were investigated, and the barrier height and spectral responsivity were controlled with the incorporation of As. The heterojunctions prepared showed spectral responses in the near UV and NIR regions, making them suitable for UV and NIR photodetection applications.
Article
Chemistry, Multidisciplinary
E. M. Elsayed, Ashraf K. Eessaa, M. M. Rashad, S. M. Abdelbasir, A. M. El-Shamy
Summary: Nanocrystalline zinc oxide (ZnO) films were electrodeposited onto indium doped tin oxide (ITO) substrates using aqueous solutions of zinc nitrate at temperatures ranging from 25 0C to 75 0C. Linear sweep voltammetry and chronopotentiometry techniques were used to investigate the deposition process and the effects of different factors. Temperature and current were found to have a significant influence on the growth of ZnO films. The nucleation mechanism was found to be instantaneous at potentials between -800 and -1200 mV, and non-instantaneous and gradual at voltages higher than -1400 mV. X-ray analysis confirmed the presence of Zincite phase with a crystallite size of 61 nm, and the films exhibited a smooth and compact surface.
EGYPTIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hesham A. Hassan, Ali Omar Turky, Ali M. Hassan, Hosni A. Gomaa, Mohmed M. Rashad
Summary: In this study, titanium substituted lanthanum strontium manganite (LSMTO) nanopowders were prepared and their structural, microstructure, magnetic properties, anti-microbial activity, and anti-cancer activity were investigated. The results showed that substitution of Ti4+ ion increased the crystallite size and affected the magnetization-temperature relationship. Furthermore, the LSMTO powders exhibited cytotoxic effects on HepG-2 cells.
EGYPTIAN JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Motaz G. Fayed, Saad G. Mohamed, Yosry F. Barakat, E. E. El-Shereafy, M. M. Rashad
Summary: Spinel Li2Co1-xCuxTi3O8 nanopowders were synthesized via a sol-gel auto-combustion scheme and their physical and chemical properties were characterized through various testing methods. The Li2Co0.75Cu0.25Ti3O8 electrode exhibited good reversible charge-discharge capacity and cycling stability in the lithium-ion battery.
BULLETIN OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Moustafa A. Shawkey, Ahmed M. Hassan, Mohamed M. Rashad
Summary: The paper compares the effects of different mixtures with ground granulated blast-furnace slag (GGBS) replacement and different sizes of concrete blocks on heat generation and the risk of cracking in mass concrete.
EGYPTIAN JOURNAL OF CHEMISTRY
(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)