Journal of Electroanalytical Chemistry最新文献_第7页

A novel physical criterion for modeling repassivation based on an extended point defect model 基于扩展点缺陷模型的再钝化建模新物理准则

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.jelechem.2026.119838

Nikos Alexiadis , Alexander Fuchs , Torsten Troßmann , Jorg Thöming , Fabio La Mantia

{"title":"A novel physical criterion for modeling repassivation based on an extended point defect model","authors":"Nikos Alexiadis , Alexander Fuchs , Torsten Troßmann , Jorg Thöming , Fabio La Mantia","doi":"10.1016/j.jelechem.2026.119838","DOIUrl":"10.1016/j.jelechem.2026.119838","url":null,"abstract":"<div><div>The ability of metals to re-form passive films is crucial for ensuring the longevity and reliability of critical components in demanding environments. Building on an extended Point Defect Model (PDM) considering chloride ion induced passive film breakdown, we introduce a physical criterion to model the dynamics of self-healing from a depassivated state. The stainless steel AISI 316 L was selected due to its practical relevance and the availability of published data demonstrating the dependence of repassivation on environmental factors. Cyclic voltammetry (CV) sweeps under varying chloride ion concentrations, temperatures, pH values and scan rates were simulated using the enhanced extended PDM. The predicted shifts in key electrochemical system responses, such as corrosion current, open circuit potential, induction time, critical breakdown potential and the repassivation potential, align well with literature findings. Furthermore, the model predicts passive film breakdown at low potentials, a phenomenon consistent with both experimental observations and fundamental thermodynamics. The capability to forecast passive film breakdown and repassivation facilitates optimal material selection and thus enhances component operation under transient environmental loads.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119838"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076391","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}

引用次数: 0

Scalable anodic electrodeposition of efficient binder-free NiO electrocatalysts for water oxidation 高效无粘结剂NiO水氧化电催化剂的可扩展阳极电沉积

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-04-01 Epub Date: 2026-01-13 DOI: 10.1016/j.jelechem.2026.119799

Zahra Kasipour Rasteh kenari , Ahmad Ahmadi Daryakenari , Arash Montazeri , Farshad Boorboor Ajdari , Mohammad Mahdi Kasipour

{"title":"Scalable anodic electrodeposition of efficient binder-free NiO electrocatalysts for water oxidation","authors":"Zahra Kasipour Rasteh kenari , Ahmad Ahmadi Daryakenari , Arash Montazeri , Farshad Boorboor Ajdari , Mohammad Mahdi Kasipour","doi":"10.1016/j.jelechem.2026.119799","DOIUrl":"10.1016/j.jelechem.2026.119799","url":null,"abstract":"<div><div>Developing high-performance, durable, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is pivotal for green hydrogen generation. In this research, the elctrocatalysts of the NiO nanostructures are directly electrodeposited onto a graphite substrate through a facile and binder-free anodic strategy. It was found that the applied deposition potential is a powerful electrochemical parameter to control the morphology, defect density, and the OER efficiency of the obtained NiO layers. The electrodeposition process, when performed at an optimized potential of 2.0 V, fabricates very tiny NiO nanoparticles that possess a high density of oxygen vacancies. This electrode fabricated at 2.0 V exhibits a proper OER activity in alkaline media, acquiring a high current density of 324 mA·cm<sup>−2</sup> at 1.8 V vs. RHE. After 24-h stability testing, the NiO-2 V electrode maintained a current density of ∼200 mA/cm<sup>2</sup> at 1.65 V vs. RHE, significantly outperforming the NiO-1 V electrode, which stabilized at only ∼10 mA/cm<sup>2</sup>.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119799"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076390","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}

引用次数: 0

Exploration of Zn2+/Co2+ cation at tetrahedral sites in spinel manganites as a battery-type electrode for prospective application in supercapattery 尖晶石锰矿四面体上Zn2+/Co2+阳离子作为电池型电极在超级电池中的应用前景

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.jelechem.2026.119871

Steffy Backianathan, Jeyabharathi Arockiasamy, Sutharthani Kannan, Suba Devi Rengapillai, Sivakumar Marimuthu

{"title":"Exploration of Zn2+/Co2+ cation at tetrahedral sites in spinel manganites as a battery-type electrode for prospective application in supercapattery","authors":"Steffy Backianathan, Jeyabharathi Arockiasamy, Sutharthani Kannan, Suba Devi Rengapillai, Sivakumar Marimuthu","doi":"10.1016/j.jelechem.2026.119871","DOIUrl":"10.1016/j.jelechem.2026.119871","url":null,"abstract":"<div><div>The trait of spinel manganites with cation substitution at tetrahedral sites was deliberately analyzed in the application panorama for future high-power energy storage systems. ZnMn<sub>2</sub>O<sub>4</sub> and CoMn<sub>2</sub>O<sub>4</sub> were synthesized via sol-gel method and followed by thermal treatment. The divalent Zn and multivalent Co cation substitution at tetrahedral localities significantly affect the electrochemical performance of spinel manganites. The grades of electrochemical tests determine that ZnMn<sub>2</sub>O<sub>4</sub> and CoMn<sub>2</sub>O<sub>4</sub> were categorized as the typical battery-grade electrode material. ZnMn<sub>2</sub>O<sub>4</sub> reveals an enhanced specific capacity may due to the extension of diffusion channels, which paves a way for insertion/extraction of ions at the solid electrolyte interphase and the synergy between the zinc and manganese cations. The electroactive material ZnMn<sub>2</sub>O<sub>4</sub> exhibits a specific capacity of 232 C g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> and a cyclic durability test was carried out to discern the capacity retention of 81.4% even after 5000 cycles. Fabricated asymmetric hybrid device unveils an energy density of 51.5 Wh Kg<sup>−1</sup> with a power density of 1123 W Kg<sup>−1</sup>. Thus, the spinel Zinc manganite shows extensive electrochemical characteristics for high-performance energy storage system.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119871"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076383","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}

引用次数: 0

Suppression of lithium deposition on negative electrode by blending hard carbon with graphite 硬碳与石墨共混抑制负极锂沉积

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.jelechem.2026.119842

Yusuke Okumura , Hikaru Kobayashi , Toshihiro Koga , Mikito Suto , Koji Nakabayashi , Seong-Ho Yoon , Jin Miyawaki

{"title":"Suppression of lithium deposition on negative electrode by blending hard carbon with graphite","authors":"Yusuke Okumura , Hikaru Kobayashi , Toshihiro Koga , Mikito Suto , Koji Nakabayashi , Seong-Ho Yoon , Jin Miyawaki","doi":"10.1016/j.jelechem.2026.119842","DOIUrl":"10.1016/j.jelechem.2026.119842","url":null,"abstract":"<div><div>Graphite is widely used as the active material of negative electrodes for lithium (Li)-ion batteries. Graphite electrodes have high energy density and good initial cycle efficiency, but their cycle property is inferior to that of hard carbon under severe conditions such as high charge rates and low temperatures. Under these conditions, graphite electrodes are susceptible to deposition of metallic Li on the electrode surface (Li plating). In this study, hard carbon was blended with graphite and the cycle properties of blended graphite negative electrodes under severe conditions were evaluated, and the mechanism of improvement of electrochemical property was investigated. Addition of hard carbon to graphite negative electrodes improved capacity retention at low temperatures and under high charge rates. No significant differences were observed in the discharge capacity, initial Coulombic efficiency, energy density, or resistance as a result of hard carbon addition within the range of addition in this study (up to 10 wt%). <em>In-situ</em> X-ray diffraction analysis revealed that graphite and hard carbon were lithiated homogeneously in the early stage of charging, and graphite was lithiated preferentially in the middle stage. At the end of charging, the graphite was Li-saturated, and the hard carbon acted as a buffer space for storage of excess Li from the saturated graphite. This buffer function is thought to be the reason for the good cycle performance of the blended electrodes.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119842"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185974","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}

引用次数: 0

Synthesis and electrochemical investigation of cobalt-free high-nickel quaternary LiNi0.9Fe0.03Mn0.04Mg0.03O2 cathodes 无钴高镍季系lini0.9 fe0.03 mn0.04 mg0.030 o2阴极的合成及电化学研究

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-04-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jelechem.2026.119879

Jiatai Wang , Yuanyuan Li , Chao Fan , Jiting Li , Xi Wen , Xiaohong Ma , Jian Li

{"title":"Synthesis and electrochemical investigation of cobalt-free high-nickel quaternary LiNi0.9Fe0.03Mn0.04Mg0.03O2 cathodes","authors":"Jiatai Wang , Yuanyuan Li , Chao Fan , Jiting Li , Xi Wen , Xiaohong Ma , Jian Li","doi":"10.1016/j.jelechem.2026.119879","DOIUrl":"10.1016/j.jelechem.2026.119879","url":null,"abstract":"<div><div>Cobalt-free high‑nickel layered oxides are promising cathode materials for lithium-ion batteries (LIBs) due to their high capacity and cost-effectiveness. Nevertheless, high‑nickel materials suffer from intrinsic challenges including severe Li/Ni cation mixing, harmful H2-H3 phase transitions, and structural degradation, which result in capacity fading and poor rate performance. In this work, the quaternary LiNi<sub>0.9</sub>Fe<sub>0.03</sub>Mn<sub>0.04</sub>Mg<sub>0.03</sub>O<sub>2</sub> (NFMM) cathodes were synthesized via homogeneous co-precipitation followed by high-temperature solid-state method. X-ray diffraction analysis confirmed well-ordered layered structures with <em>I</em>(0 0 3)<em>/I</em>(1 0 4) ratios of 1.28, 1.73, and 1.46 for samples calcined at 700 °C, 725 °C, and 750 °C, respectively. All samples delivered high initial discharge capacities of 191.53, 193.27, and 186.30 mAh g<sup>−1</sup> at 0.1C, maintaining 86.58%, 91.97%, and 89.21% capacity retention after 100 cycles at 0.2C. The materials showed good rate capability with discharge capacities of 91.46, 97.15, and 85.32 mAh g<sup>−1</sup> at 5.0C. These results demonstrate that the NFMM quaternary composition exhibits favorable electrochemical performance, contributing to the development of cobalt-free cathode materials for lithium-ion batteries.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119879"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076385","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}

引用次数: 0

Synergistic K+ intercalation and PVP modification: boosting V2O5 cathode performance for aqueous zinc-ion batteries 协同K+插层和PVP改性：提高水性锌离子电池V2O5阴极性能

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-04-01 Epub Date: 2026-01-29 DOI: 10.1016/j.jelechem.2026.119892

Zihang Zhou , Zhi Chen , Suwen Lai , Hongkun Lu , Juntong Huang , Huiyong Yang , Xiaofeng Chen , Qi Sun , Hui Zhou , Wentao Qian

{"title":"Synergistic K+ intercalation and PVP modification: boosting V2O5 cathode performance for aqueous zinc-ion batteries","authors":"Zihang Zhou , Zhi Chen , Suwen Lai , Hongkun Lu , Juntong Huang , Huiyong Yang , Xiaofeng Chen , Qi Sun , Hui Zhou , Wentao Qian","doi":"10.1016/j.jelechem.2026.119892","DOIUrl":"10.1016/j.jelechem.2026.119892","url":null,"abstract":"<div><div>With their inherent safety, cost-effective, and environmental sustainability, aqueous zinc-ion batteries (AZIBs) represent a highly promising technology for future energy storage. Vanadium-based oxides hold great application potential owing to their abundant tunnel structures and high electrode potentials. However, the primary limitations of vanadium-based oxides lie in their poor electrical conductivity and poor cycling stability. Therefore, advancing AZIBs requires cathode materials that can achieve high-capacity Zn<sup>2+</sup> storage while ensuring long-term structural stability. This study successfully prepared PKVOH with stacked nanosheets by K<sup>+</sup> intercalation and PVP coating modification of V<sub>2</sub>O<sub>5</sub> via hydrothermal reaction. The supporting role of K<sup>+</sup> mitigates rapid collapse of the vanadium-based material, while PVP modification engineers a favorable morphology with high specific surface area, thereby directly creating additional electrochemically active sites. Outstanding cycling stability is achieved with the PKVOH electrode, achieving a specific capacity as high as 356 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup>. Remarkably, A capacity of 188 mAh g<sup>−1</sup> is retained after 4000 cycles at 5 A g<sup>−1</sup>. Complementarily, the Zn<sup>2+</sup> storage mechanism was probed using ex-situ XRD analysis, providing new insights into enhancing the ion-doping performance of vanadium-based materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119892"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076384","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}

引用次数: 0

Label-free multi-aptamer DNA nanowire electrochemical sensor based on HCR for highly sensitive detection of ATP 基于HCR的无标记多适体DNA纳米线电化学传感器用于ATP的高灵敏度检测

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-04-01 Epub Date: 2026-01-29 DOI: 10.1016/j.jelechem.2026.119882

Xiaoyan He , Zhiqiang Wang , Yanling Liang , Jing Li , Yuanyuan Lu , Xin Tian

{"title":"Label-free multi-aptamer DNA nanowire electrochemical sensor based on HCR for highly sensitive detection of ATP","authors":"Xiaoyan He , Zhiqiang Wang , Yanling Liang , Jing Li , Yuanyuan Lu , Xin Tian","doi":"10.1016/j.jelechem.2026.119882","DOIUrl":"10.1016/j.jelechem.2026.119882","url":null,"abstract":"<div><div>Adenosine triphosphate (ATP) plays an irreplaceable role as an energy donor in regulating cellular metabolism. When detecting ATP in complex samples, conventional single-adaptor sensors often suffer from low capture efficiency and poor sensitivity. This study synthesizes a substrate material combining multi-walled carbon nanotubes (MWCNTs) with gold nanoparticles (AuNPs), endowing it with both excellent conductivity and biocompatibility, thereby providing an ideal platform for subsequent sensor construction. By employing unlabeled multi-aptamer DNA nanowires synthesized via hybridization chain reaction (HCR) as the recognition element, the sensor's specific binding capacity for ATP in complex environments is significantly enhanced. Under optimized conditions, the sensor has a detection range of 0.1 pM to 1 μM with a detection limit as low as 0.04 pM. Moreover, the sensor demonstrated excellent reproducibility and selectivity toward ATP, enabling its successful application in accurately determining ATP levels in real serum samples. The recoveries were 97.40%–104.6% with relative standard deviations (RSDs) of 3.9%–4.6%, which demonstrated its strong ability to detect ATP and may provide valuable insights for the analysis of other small biomolecules.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119882"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185972","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}

引用次数: 0

Synergistic RuFe mixed oxide nanotubes with enriched oxygen vacancies for enhanced electrocatalytic oxidation of l-ascorbic acid 富氧空位协同RuFe混合氧化物纳米管增强l-抗坏血酸电催化氧化

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-03-15 Epub Date: 2026-01-20 DOI: 10.1016/j.jelechem.2026.119846

Chae Jung Park, Subin Choi, Youngmi Lee

{"title":"Synergistic RuFe mixed oxide nanotubes with enriched oxygen vacancies for enhanced electrocatalytic oxidation of l-ascorbic acid","authors":"Chae Jung Park, Subin Choi, Youngmi Lee","doi":"10.1016/j.jelechem.2026.119846","DOIUrl":"10.1016/j.jelechem.2026.119846","url":null,"abstract":"<div><div>Ru<img>Fe mixed oxide (Ru<sub><em>x</em></sub>Fe<sub>2−<em>x</em></sub>O<sub><em>y</em></sub>, <em>x</em> = 0.8, 1, 1.2) nanotubes were synthesized via electrospinning and thermal annealing, and benchmarked against single-component RuO<sub>2</sub> counterpart for <span>l</span>-ascorbic acid (AA) sensing. Physical characterization confirmed hollow nanotubular structures of Ru<sub>1</sub>Fe<sub>1</sub>O<sub><em>y</em></sub> exhibiting the highest metallic Ru<sup>0</sup> fraction and oxygen-vacancy content, features that correlate with reduced charge-transfer resistance. In physiological pH condition (PBS, pH 7.4), Ru<sub>1</sub>Fe<sub>1</sub>O<sub><em>y</em></sub> delivered the most favorable analytical performance for AA oxidation, with superior sensitivity, the lowest detection limit, and the fastest response time. Unlike RuO<sub>2</sub>, which showed gradual current decay during operation, Ru<sub>1</sub>Fe<sub>1</sub>O<sub><em>y</em></sub> maintained stable amperometric responses during repeated AA injections and retained 97.2% of its initial sensitivity after 28 days. Differential pulse voltammetry further enabled simultaneous and selective detection of AA, dopamine, and uric acid. In real-sample assays of vitamin C tablets, Ru<sub>1</sub>Fe<sub>1</sub>O<sub><em>y</em></sub> achieved near-quantitative recovery (∼100%), confirming high reliability. The synergy between Ru and Fe, a predominantly disordered (amorphous-like) structure and oxygen-vacancy enrichment, underpins the superior sensing properties. Supported by composition/thermal controls and a physical-mixture comparison, these results highlight Ru<img>Fe nanotubes as cost-effective, high-performance platforms for selective AA detection in complex biological and food matrices.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1005 ","pages":"Article 119846"},"PeriodicalIF":4.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036926","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}

引用次数: 0

Electrolyte-induced electronic activation and interfacial blocking of cefuroxime: An optical and impedance study 电解质诱导的头孢呋辛的电子激活和界面阻断：光学和阻抗研究

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-03-15 Epub Date: 2026-01-20 DOI: 10.1016/j.jelechem.2026.119850

M.A. Radoi , B. Tutunaru

{"title":"Electrolyte-induced electronic activation and interfacial blocking of cefuroxime: An optical and impedance study","authors":"M.A. Radoi , B. Tutunaru","doi":"10.1016/j.jelechem.2026.119850","DOIUrl":"10.1016/j.jelechem.2026.119850","url":null,"abstract":"<div><div>The electrochemical reactivity of antibiotic pollutants is commonly discussed in terms of either molecular electronic activation or interfacial electrochemical kinetics, yet these two aspects are rarely evaluated simultaneously. Here, we provide a combined optical–electrochemical analysis that reveals a previously overlooked decoupling between optical-gap modulation and interfacial charge-transfer behavior. Using cefuroxime (CFRX) as a model β-lactam antibiotic, we systematically investigate the effect of halide supporting electrolytes (NaF, NaCl, NaBr) on molecular electronic structure and electrode–solution interface properties under acidic, neutral, and alkaline conditions. UV–Vis spectroscopy combined with Tauc analysis demonstrates electrolyte- and pH-dependent optical-gap narrowing, with bromide inducing the strongest electronic activation. In contrast, electrochemical impedance spectroscopy shows that the same conditions lead to increased charge-transfer resistance and reduced double-layer capacitance due to enhanced adsorption and interfacial blocking effects. By directly correlating optical activation with impedance-derived interfacial parameters, this study establishes that optical-gap reduction is not a direct indicator of interfacial charge-transfer behavior governing electrochemical reactivity. The findings highlight electrolyte-induced interfacial accessibility as a critical, yet often overlooked, factor in electrochemical water treatment and provide mechanistic insight into interfacial processes relevant to reactivity prediction rather than direct measurements of degradation rates.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1005 ","pages":"Article 119850"},"PeriodicalIF":4.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036935","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}

引用次数: 0

Micromagnet-loaded bipolar plate design for vanadium redox flow batteries: Improved mass transport and electrochemical performance 钒氧化还原液流电池的微磁负载双极板设计：改善质量传递和电化学性能

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2026-03-15 Epub Date: 2026-01-19 DOI: 10.1016/j.jelechem.2026.119835

Yu Tian , Hongbo Liu , Jiaqi Wan , Shuo Tang , Kang cen , Qiang li , Sibo Fu

{"title":"Micromagnet-loaded bipolar plate design for vanadium redox flow batteries: Improved mass transport and electrochemical performance","authors":"Yu Tian , Hongbo Liu , Jiaqi Wan , Shuo Tang , Kang cen , Qiang li , Sibo Fu","doi":"10.1016/j.jelechem.2026.119835","DOIUrl":"10.1016/j.jelechem.2026.119835","url":null,"abstract":"<div><div>The Vanadium Redox Flow Battery (VRFB) holds significant promise for large-scale energy storage applications due to its high safety, long cycle life, and favorable environmental characteristics. However, VRFBs face challenges at high current density, such as concentration polarization and electrochemical kinetic hysteresis, which limit their energy conversion efficiency and power density. To alleviate these limitations, this paper proposes an innovative bipolar plate (BPP) design. By integrating micromagnets onto the BPP, the magnetohydrodynamic (MHD) effect enhances the electrolyte's mass transfer process. Using a multi-physics field-coupled numerical simulation approach, this study systematically investigates the impact of the micromagnet-loaded BPP structure on ion transport and electrochemical performance. The results demonstrate that the micromagnet-loaded design optimizes electrolyte flow distribution, improves ion transport pathways, mitigates concentration polarization, and enhances electrochemical reaction efficiency at the electrode, thereby significantly improving battery performance. This paper presents a novel design approach for enhancing the energy efficiency of VRFBs, particularly in terms of achieving high power density and effective energy conversion.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1005 ","pages":"Article 119835"},"PeriodicalIF":4.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036938","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}

引用次数: 0