Journal of Electroanalytical Chemistry最新文献

{"title":"Boosting Li+ transport kinetics and structural stability of Co-free LiNi0.9Mn0.1-xAlxO2 cathode materials","authors":"Xiaoyi Hou ,&nbsp;Leilei Hu ,&nbsp;Yibo Zhang ,&nbsp;Liang Zhao ,&nbsp;Xi Wu ,&nbsp;Haozhe Wu ,&nbsp;Yan Tan ,&nbsp;Yulong Kang ,&nbsp;Jiatai Wang","doi":"10.1016/j.jelechem.2025.119092","DOIUrl":"10.1016/j.jelechem.2025.119092","url":null,"abstract":"<div><div>This study successfully synthesized Li[Ni_0.9Mn_0.06Al_0.04]O₂ (NMA964) cathode material using an organic amine co-precipitation method combined with high-temperature solid-state synthesis. Mechanistic insight into Al³⁺ doping via theory-experiment synergy revealed that Al³⁺ doping plays a dual role in enhancing structural stability and electrochemical performance. First-principles calculations demonstrated that Al<img>O covalent bonds effectively suppress cation mixing and mitigate anisotropic stress during H2-H3 phase transitions, while experimental analyses confirmed that these bonds stabilize the host lattice against crack propagation. Additionally, Al³⁺ doping optimizes Li⁺ transport kinetics by reducing electrostatic repulsion between adjacent Li layers. As a result, the NMA964 cathode delivers an ultrahigh initial discharge capacity of 228.3 mAh g⁻¹ at 0.1C (2.5–4.3 V) and retains 165.9 mAh g⁻¹ after 100 cycles at 0.5C (72.6 % capacity retention), outperforming the undoped Li[Ni_0.9Mn_0.1]O₂ counterpart. This work provides atomic-level guidance for designing high-energy cathodes through targeted doping.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119092"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesize of NiSe2/Mo-MOF nanocomposite for sensitive determination of antiretroviral agent dolutegravir in pharmaceutical formulations and biological fluids","authors":"Edoh Nicodème Gabiam ,&nbsp;Nevin Erk ,&nbsp;Asena Ayse Genc ,&nbsp;Wiem Bouali ,&nbsp;Mustafa Soyla ,&nbsp;Qamar Salamat ,&nbsp;Hassan Elzain Hassan Ahmed","doi":"10.1016/j.jelechem.2025.119096","DOIUrl":"10.1016/j.jelechem.2025.119096","url":null,"abstract":"<div><div>The precise detection of antiretroviral agents, such as Dolutegravir (DTG), is essential for effective HIV treatment and optimal patient management. This study presents the synthesis of NiSe₂/Mo-MOF nanocomposite and its application as a modifier for the accurate detection of DTG in pharmaceutical formulations and biological fluids. NiSe₂ nanocrystals were synthesized using a modified hydrothermal method and subsequently incorporated into a Mo-MOF matrix through a solvothermal process. Characterization of the nanocomposite was performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and electrochemical impedance spectroscopy (EIS). Electrochemical investigations demonstrated that the NiSe₂/Mo-MOF sensor exhibited excellent sensitivity, selectivity, and reproducibility, with a low detection limit of 3.68 nM for DTG. The superior performance of the sensor can be attributed to the synergistic interaction between NiSe₂ and Mo-MOF. This study demonstrates the potential of NiSe₂/Mo-MOF nanocomposites as efficient, reliable, and cost-effective electrochemical sensors, providing a promising platform for drug monitoring in clinical and pharmaceutical applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119096"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and electrochemical performance evaluation of lithiophilic dual-interface layers for high-rate lithium metal batteries","authors":"Yu Lin,&nbsp;Hong Chen,&nbsp;Weimin Chen","doi":"10.1016/j.jelechem.2025.119091","DOIUrl":"10.1016/j.jelechem.2025.119091","url":null,"abstract":"<div><div>Lithium metal batteries (LMBs) are regarded as the paradigm of next-generation high-energy-density batteries, attributable to their exceptionally high theoretical specific capacity. However, the commercialization process of LMBs is impeded by severe dendrite growth, uncontrolled volume expansion, and unstable solid electrolyte interphase (SEI). Herein, by coating a trace of Al protective layer on the separator towards the lithium metal anode and modifying a layer of lithiophilic TiN on the conductive carbon cloth, lithiophilic dual-interface (Al-CFC@TiN-Li) synergistic protective layers are ingeniously designed and constructed, which effectively enhances the adsorption and desorption kinetics during the electrochemical cycle. Therefore, the provision of lithium nucleation sites during the plating/stripping process facilitates the ultra-fast transport of lithium ions and ensures a uniform lithium ion flux, thereby achieving ultra-high cycle stability (no short circuit at high current density (6 mA cm⁻²) and high area capacity (10 mAh cm⁻²)), exceptional capacity retention (a capacity retention of 92.6 % for Li||LFP cells over 400 cycles), and universal adaptability (adapted to the NCM523 cathode). This work provides a facile strategy for constructing high-performance LMBs, offering more possibilities for the practical application of LMBs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119091"},"PeriodicalIF":4.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling novel capacity (electro)recovery for Chloranilate-based alkaline redox flow batteries","authors":"Ali Tuna ,&nbsp;Vahid Abbasi ,&nbsp;Carita Kvarnström ,&nbsp;Pekka Peljo","doi":"10.1016/j.jelechem.2025.119081","DOIUrl":"10.1016/j.jelechem.2025.119081","url":null,"abstract":"<div><div>This study monitors a two-electron chloranilate-ferrocyanide redox flow battery system in alkaline media at 1.1 V, focusing on capacity recovery during charge-discharge operations. Capacity decay is relatively stabilized and restored via electrochemical oxidation process at certain steps. Different concentrations and cycle performances are also tested.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119081"},"PeriodicalIF":4.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-sensitive detection of dopamine using oxygen plasma-treated Ti3C2Tx-modified carbon electrodes: DFT and experimental investigations","authors":"Jing Wang ,&nbsp;Long Zhao ,&nbsp;Jing Su ,&nbsp;Haiying Du ,&nbsp;Qiang Shao ,&nbsp;Liding Wang","doi":"10.1016/j.jelechem.2025.119077","DOIUrl":"10.1016/j.jelechem.2025.119077","url":null,"abstract":"<div><div>Dopamine (DA) plays a critical role in various neurological disorders, including Parkinson's disease and schizophrenia, making its accurate and ultra-sensitive detection crucial for early diagnosis and treatment. In this study, a novel electrochemical sensor for DA detection was developed using monolayer Ti₃C₂T_x Mxene material treated with oxygen plasma. The oxygen plasma treatment significantly enhanced the surface activity and electronic transport capabilities of Ti₃C₂T_x, resulting in an ultra-low detection limit of 0.005 nM for DA. Electrochemical tests demonstrated the sensor's excellent sensitivity, stability, and performance. To further elucidate the underlying mechanisms of enhanced electrochemical performance, density functional theory (DFT) calculations were employed to investigate the impact of oxygen plasma treatment on the electronic structure of Ti₃C₂T_x. The DFT results revealed that the oxygen plasma treatment notably increased the number of active sites by introducing more oxygen-terminated functional groups on the surface of Ti₃C₂T_x. These oxygenated functional groups acted as catalysts, lowering the activation energy required for DA electrochemical reactions. Additionally, the oxygen plasma treatment effectively reduced the lattice constant of Ti₃C₂T_x, improving its internal electronic transport properties and thus enhancing its conductivity. The theoretical studies are in strong agreement with the experimental results, providing a clear understanding of the interaction between DA molecules and the oxygen-functionalized Ti₃C₂T_x surface. This research highlights the potential of oxygen plasma-treated Ti₃C₂T_x as a high-performance electrochemical sensing material and offers new perspectives for the development of sensitive biosensors.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119077"},"PeriodicalIF":4.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-performance capacitors based on in situ Ni-doped CoMoO4@CNTs composites","authors":"Mingwei Li,&nbsp;Yuhan Zou,&nbsp;Hongxun Zhang,&nbsp;Fang Yang","doi":"10.1016/j.jelechem.2025.119082","DOIUrl":"10.1016/j.jelechem.2025.119082","url":null,"abstract":"<div><div>In situ Ni-doped CoMoO₄@CNTs composites were synthesized using nickel nitrate formed on nitric acid-pretreated nickel foam as a nickel source. Due to the participation of nickel foam in the synthesis of CoMoO₄@CNTs, the nickel foam is firmly bonded to the composite, which is beneficial for the structural stability during cycling. The addition of CNTs alters the dispersion and interfacial properties of the reactive precursor in an aqueous solution, leading to a morphological change in the nanosheets. The in situ Ni-doped CoMoO₄@CNTs nanomaterials with 20, 30, 40, and 50 mg CNTs added exhibit specific capacitances of 4150, 4460, 4800, and 4630 mF·cm⁻² at 10 mA·cm⁻², respectively. These values are significantly higher than those of Ni-doped CoMoO₄ synthesized without CNTs (3730 mF·cm⁻²). An asymmetric supercapacitor (ASC) assembled using the Ni-doped CoMoO₄@CNTs electrode material (with 40 mg CNTs) and activated carbon demonstrates a specific capacitance of 884.5 mF·cm⁻² at 10 mA·cm⁻². With a high energy density of 111.82 Wh·kg⁻¹ at a power density of 1280 W·kg⁻¹, the ASC retains 97.6 % of its capacitance after 10,000 cycles.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119082"},"PeriodicalIF":4.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting hydrogen evolution on M-Pt-S (M = VIB Cr, Mo, W) via facile electroreduction and electrodeposition","authors":"Shaofang Shi ,&nbsp;Mengqiu Li ,&nbsp;Jiayun Zeng ,&nbsp;Juan Wang ,&nbsp;Gaofeng Zeng ,&nbsp;Qin Zhong","doi":"10.1016/j.jelechem.2025.119076","DOIUrl":"10.1016/j.jelechem.2025.119076","url":null,"abstract":"<div><div>With the rapid development of renewable energy utilization, hydrogen production by electrochemical water hydrolysis has attracted renewed research interest. The improvement of unit mass activity of low-Pt loading catalysts for hydrogen evolution reaction (HER) and the reduction of cost is attractive and challenging. Herein, the sulfide of the VIB subgroup metal (M = Cr, Mo, W) was prepared by a simple and mild electroreduction method, and Pt nanoparticles were grown on the sulphide of the VIB subgroup by Pulse electrodeposition. The M-Pt-S composite catalysts show excellent HER activity. Especially, Mo-Pt-S shows excellent HER performance (<em>η</em>₁₀ = 30.12 mV) in 0.5 M H₂SO₄ and excellent unit mass activity of 26.63 A mg⁻¹ at 50 mV, which is superior to the corresponding monofunctional Pt noble metal catalyst.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119076"},"PeriodicalIF":4.1,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical conjugation of surface proteins for sensitive detection of breast cancer extracellular vesicles","authors":"Junda Li ,&nbsp;Jianhua Guan ,&nbsp;Lin Yuan ,&nbsp;Ya Cao ,&nbsp;Bo Xu","doi":"10.1016/j.jelechem.2025.119088","DOIUrl":"10.1016/j.jelechem.2025.119088","url":null,"abstract":"<div><div>Breast cancer extracellular vesicles (EVs) are rich in molecular information related to breast tumors and are thus considered valuable diagnostic biomarkers. Herein, we develop a new electrochemical method for the detection of breast cancer EVs. This method employs an aptamer to achieve specific capture of target EVs and then adopts a signal generation strategy that does not depend on the expression of specific EV surface proteins, thereby ensuring an efficient and reliable signal output. Specifically, this signal generation strategy, namely, the electrochemical conjugation of surface proteins, utilizes an electric potential to facilitate the conjugation of redox-active small molecules to the tyrosine residues of EV surface proteins, introducing a large number of reaction sites within minutes. Following this, methylene blue-loaded DNA nanospheres are integrated onto the surface of target EVs through click chemistry, producing a remarkable electrochemical response. Taking HER-2 positive breast cancer EVs as models, this method exhibits a wide linear range from 100 to 1 × 10⁸ particles/mL, as well as good sensitivity with a detection limit of 65 particles/mL. Further validation using clinical samples from 5 healthy donors and 19 breast cancer patients reveals the practicality of this method in the diagnosis of HER-2 positive breast cancer. Therefore, we hope that this method can provide a valuable tool for detecting breast cancer EVs, and will have a broad application prospect based on the ubiquitous presence of tyrosine residues.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119088"},"PeriodicalIF":4.1,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption of iodide ions at the Bi(111)| trimethyl phosphate interface","authors":"Mart Väärtnõu,&nbsp;Enn Lust","doi":"10.1016/j.jelechem.2025.119061","DOIUrl":"10.1016/j.jelechem.2025.119061","url":null,"abstract":"<div><div>The adsorption of I⁻ anions on the Bi(111) single crystal plane from trimethyl phosphate has been investigated with impedance measurements. Both electrode charge and electrode potential were applied as the independent electrical variables in the calculations of the ionic charge due to the specific adsorption following the mixed-electrolyte method. It was found that under comparable conditions, the values of specific adsorption charge calculated at constant electrode charge and electrode potential, are practically coincident. The Gibbs energy of I⁻ anions adsorption has been calculated using the virial adsorption isotherm. It was found that the standard Gibbs energy of I⁻ anion adsorption is lower than in the other solvents studied earlier (acetonitrile, gamma-butyrolactone and various carbonates). However, the specific adsorption charge values of iodide ions in trimethyl phosphate depends more from relative concentration of I⁻ ions in the solution than for other systems. This corresponds to lower lateral repulsion coefficient values, calculated from the virial isotherm. The electrosorption valency values have been calculated and it was found that this parameter is higher in trimethyl phosphate than in other studied organic solvents.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"985 ","pages":"Article 119061"},"PeriodicalIF":4.1,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable anode materials from Cenchrus fungigraminus biomass for advanced lithium-ion batteries","authors":"Zhiyun Guo,&nbsp;Tong Cheng,&nbsp;Weicheng Zheng,&nbsp;Qinzhi Zeng,&nbsp;Nairong Chen,&nbsp;Weigang Zhao,&nbsp;Jiuping Rao","doi":"10.1016/j.jelechem.2025.119090","DOIUrl":"10.1016/j.jelechem.2025.119090","url":null,"abstract":"<div><div>Biomass-derived materials have garnered significant attention as sustainable anode candidates for lithium-ion batteries (LIBs) owing to their abundance, low cost, and environmental benefits. Among these, Cenchrus fungigraminus (JUJUNCAO) stands out due to its rapid growth, high yield, and exceptional environmental adaptability, making it a promising precursor for carbon-based electrodes. In this study, activated carbon was synthesized from JUJUNCAO through a two-step process involving carbonization and KOH activation. By systematically varying the activation temperature and the biochar/KOH weight ratio, we precisely controlled key properties such as the degree of graphitization, porosity, chemical composition, and electrochemical performance. The optimized activated carbon exhibited a high specific surface area of 1055 m² g⁻¹ and delivered a reversible specific capacity of 393 mAh g⁻¹ after 650 charge/discharge cycles at a current density of 0.1 A g⁻¹. This superior electrochemical performance is attributed to the hierarchical porous structure and heteroatom doping, which synergistically enhance lithium-ion diffusion and electron transport. These findings not only underscore the potential of JUJUNCAO as a sustainable, high-performance anode material for LIBs but also pave the way for the high-value utilization of biomass in green energy storage technologies.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"985 ","pages":"Article 119090"},"PeriodicalIF":4.1,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}