Article
Electrochemistry
Negar Moradighadi, Srdjan Nesic, Bernard Tribollet
Summary: Electrochemical Impedance Spectroscopy (EIS) is a useful tool for studying electrochemical reactions and mechanisms, with the choice of DC potential being crucial for studying specific reactions; a new model has been developed in this study to predict which reaction dominates the measured impedance at specific potentials.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
V. Bongiorno, S. Gibbon, E. Michailidou, M. Curioni
Summary: This study explores the potential use of machine learning algorithms to interpret electrochemical impedance spectroscopy (EIS) data, focusing on classification and fitting scenarios. The traditional approach based on equivalent circuit modeling is difficult to automate and has limited industrial applications.
Article
Chemistry, Inorganic & Nuclear
Dan Zhou, Yi-Xiang Chen, Xiao-Yu Yuan, Zhuang-Lei Chai, Jin-Ku Liu
Summary: This study successfully achieved the precise design of non-chemometric single-phase metal oxides (MVMOs) using the gradient intrinsic reduction method. The correlation between oxygen vacancies and electrochemical anticorrosion protection was explored systematically. The results confirmed the decisive role of periodic oxygen vacancies in electrochemical anticorrosion.
INORGANIC CHEMISTRY
(2022)
Article
Electrochemistry
Yoganandan Govindaraj, Durgambika Venkatachalam, Manoj Prabhakar, Natarajan Thayee Manikandanath, Jayam Nagabushan Balaraju, Michael Rohwerder, Lakshman Neelakantan
Summary: The synthesized nano-sized cerium vanadate is proposed as a self-healing corrosion inhibitor for ferrous alloys, with good inhibitive effects and film-forming ability.
ELECTROCHIMICA ACTA
(2022)
Article
Materials Science, Multidisciplinary
R. Gonzalez-Parra, A. Covelo, M. Hernandez
Summary: The study investigated the influence of potentiodynamic scan rate on the formation of artistic patinas on a quaternary copper alloy, revealing the composition and characteristics of patinas formed at different scan rates. The results showed that patinas formed at lower scan rates exhibit better corrosion protection effects.
Article
Electrochemistry
Linqian Wang, Darya Snihirova, Min Deng, Bahram Vaghefinazari, Daniel L. Hoeche, Sviatlana V. Lamaka, Mikhail L. Zheludkevich
Summary: Tribo-electrochemical impedance spectroscopy (Tribo-EIS) measurements were conducted on pure Mg in NaCl solution to identify the origin of two time constants observed in standard EIS measurements. The study revealed that the high frequency time constant is associated with the barrier properties of the MgO-based surface film, while the middle frequency time constant is attributed to the charge transfer process.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Jaehwan Kim, Ki-Tae Park, Tae Ho Kwon
Summary: To cope with the premature deterioration of reinforced concrete structures caused by chloride-induced corrosion, estimating the corrosion rate and calculating transport parameters is necessary. However, interpreting the impedance response of steel embedded in concrete is still challenging. Concrete acts as a good barrier but can contain unexpected or invisible variables that hinder electrical measurements. Overcoming these limitations requires confirming impedance responses under controlled variable cases.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Sourav Kr. Saha, Tomoya Takano, Koji Fushimi, Masatoshi Sakairi, Ryosuke Saito
Summary: The curing behavior of cement paste and formation of passive film on iron were studied using electrochemical techniques and X-ray photoelectron spectroscopy (XPS). The open circuit potential of iron was monitored in cement paste with a pH of -13 for 56 days, and the results showed that the iron was kept in a passive state. The results of electrochemical impedance spectroscopy revealed an increasing trend of film and cement paste resistance with curing time. XPS analysis provided evidence that the formation of ferric hydroxide and ferric oxide was efficient in passivating the iron. The iron surface receded from corrosion due to the high-alkaline environment of cement paste and the formation of a passive film.
SURFACES AND INTERFACES
(2023)
Article
Electrochemistry
M. Moradi, G. Ghiara, R. Spotorno, D. Xu, P. Cristiani
Summary: This study used electrochemical impedance spectroscopy to analyze and discuss case studies on microbial corrosion and microbial corrosion inhibition. The results showed that bacterial biofilms have a significant impact on both the corrosive and inhibitive processes, but do not constitute an additional time constant.
ELECTROCHIMICA ACTA
(2022)
Article
Metallurgy & Metallurgical Engineering
S. Al Bacha, I. Aubert, M. Zakhour, M. Nakhl, J. L. Bobet
Summary: The hydrolysis of Mg-based materials is an ideal solution for clean energy production, with AlCl3 identified as the most effective ball milling additive to enhance the reaction. The best results were achieved by milling AZ91 at 350 rpm, reaching an efficiency of 75% of its theoretical H2 generation capacity.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Engineering, Chemical
Funan Sun, Pengju Han, Bin He
Summary: The initial corrosion evolution process of X80 steel exposed to silty soil mixed with NaCl at increasing salinities and temperatures was investigated. Based on the electrochemical testing and microscopic observations, the analysis results indicate that the dissolution rate is limited by cathodic processes in moist soil. The migration and accumulation of Cl- ions on the oxide film surface are driven by soil water potential after soil freezing, resulting in the decomposition of the film. The release of Fe2+ accelerates the passivation rate and the growth of salt and ice water crystals on the steel-soil interface expands the void between the soil particles, thereby further increasing the diameter of the corrosion pit.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jesus Manuel Jaquez-Munoz, Citlalli Gaona-Tiburcio, Ce Tochtli Mendez-Ramirez, Miguel Angel Baltazar-Zamora, Francisco Estupinan-Lopez, Raul German Bautista-Margulis, Josefina Cuevas-Rodriguez, Juan Pablo de los Rios, Facundo Almeraya-Calderon
Summary: The anodization of titanium is an effective method to protect titanium and its alloys from corrosive environments. In this study, the electrochemical corrosion behavior of Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V alloys anodized in 1M H2SO4 and H3PO4 solutions was evaluated. The anodized samples showed changes in E-corr values and a higher passivation zone. EIS analysis revealed a higher resistance for samples anodized in H3PO4 and Ti-6Al-2Sn-4Zr-2Mo.
Article
Materials Science, Multidisciplinary
O. Burak Istanbullu, Gulsen Akdogan
Summary: This study analyzes the effects of thin-film Diamond-Like-Carbon (DLC) deposition on the repellency to body fluids and corrosion behavior of intravascular stent materials. The results show that DLC thin-film can improve the corrosion resistance and reduce blood adhesion of the stent, making it a potential application in fluid-repellent and anti-corrosive drug-free stents.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
M. Legree, V Charbonnier, S. Al Bacha, K. Asano, K. Sakaki, I Aubert, F. Mauvy, J. Sabatier, J-L Bobet
Summary: Hydrolysis of Magnesium with water is a promising method for high-rate H2 production, especially when alloyed with nobler elements. This study investigated the hydrogen generation properties of Magnesium-based alloys with Long Period Stacking Ordered (14 H-LPSO) structures. The results indicated that the rare earth and transition metal elements in the LPSO structure significantly influenced the corrosion and hydrolysis properties of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Muhammad Shafa, Iqbal Ahmad, Shahid Hussain, Muhammad Asif, Yi Pan, Rustem Zairov, Asma A. Alothman, Mohamed Ouladsmane, Zahid Ullah, Nabi Ullah, Chen Lai, Uzma Jabeen
Summary: A nanoalloy-based electrochemical sensor for H2O2 detection has been fabricated using chemical reduction methodology. The prepared samples were characterized by X-ray diffraction and scanning electron microscopy. Among all the compositions, Ag-Cu (9:1) nanoalloys showed the best performance in detecting H2O2.
SURFACES AND INTERFACES
(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)