Electrochimica Acta最新文献

{"title":"WO3/BiVO4 heterojunctions: Photoelectrochemical performance for dexamethasone degradation and toxicity assessment in Lactuca sativa","authors":"Roberta Y.N. Reis ,&nbsp;Isabelle M.D. Gonzaga ,&nbsp;Roger Gonçalves ,&nbsp;Carlos H.M. Fernandes ,&nbsp;Marcelo Assis ,&nbsp;Ernesto C. Pereira ,&nbsp;Marcos R.V. Lanza ,&nbsp;Lucia H. Mascaro","doi":"10.1016/j.electacta.2025.146195","DOIUrl":"10.1016/j.electacta.2025.146195","url":null,"abstract":"<div><div>Water contamination by dexamethasone (DEX) poses a significant threat to the global population. Developing an effective and affordable system for DEX removal remains a critical need, particularly in treating DEX and other contaminants at environmentally relevant concentrations. Chemical bath and spin coating techniques were applied to synthesize a custom-designed WO₃/BiVO₄ interface electrode on a fluorine-doped tin oxide (FTO) substrate. Each WO₃/BiVO₄, WO₃, and BiVO₄ layer was characterized both photochemically and electrochemically to identify enhanced light harvesting and electron transfer at the heterojunction. Compared to the pristine materials, more charge carriers, enhanced transfer, and separation of photogenerated pairs were observed. The effectiveness of the WO₃/BiVO₄ electrode in removing 10 mg <em>L</em>⁻¹ DEX was evaluated under photolysis, electrocatalysis (EC), and photoelectrocatalysis (PhEC) treatment conditions. The PhEC treatment at 1 mA cm⁻² under visible light irradiation exhibited an excellent DEX removal efficiency of 100 %, surpassing photocatalysis (54 %) and EC (14.6 %). The mineralization rate and the formation of short-chain acids (oxalic, succinic, glycolic, and adipic) depended on the processes investigated. The large formation of superoxide radicals from the photogenerated charges in WO₃/BiVO₄ was revealed by scavenger tests, elucidating the degradation mechanism in PhEC, which resulted in a final product with lower toxicity, proven by tests with <em>Lactuca sativa</em>. The application of reuse cycles and characterizations after the PhEC processes demonstrated the electrode's good quality and useful life. Therefore, it can be inferred that the WO₃/BiVO₄ electrode applied in the PhEC process efficiently removes DEX and presents itself as a promising proposal for treating residual drugs in environmental matrices.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146195"},"PeriodicalIF":5.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of common metallic impurities on the performance of a single-cell iron-chromium redox flow battery","authors":"Nico Mans, Derik van der Westhuizen, Henning Manfred Krieg","doi":"10.1016/j.electacta.2025.146167","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146167","url":null,"abstract":"In this study the impact of metallic impurities on an ICRFB's performance was investigated, focusing on producing an electrolyte directly from a ferrochrome alloy to reduce processing steps and thus production cost. To determine their influence on ICRFB performance, a synthetic electrolyte was spiked with impurities at varying concentrations. ICP-OES analysis identified Cu, Ni, Co, Mn, V, Ti, Mg, K, Na, Ca, and Al as main impurities in the ferrochrome ore. Among these, Cu and Ni detrimentally affected performance. Cu plated on the negative electrode during charging, potentially causing operational issues at an industrial scale. While Ni decreased various performance metrics (CE, VE, EE and discharge capacity), it did lead to an increased ASR and capacity decay probably due to plating (negative electrode) and dissolution mechanisms leading to the consumption of electrons and production of hydrogen respectively. Interestingly, trace amounts (<span><span><math><mo is=\"true\">&gt;</mo></math></span><script type=\"math/mml\"><math><mo is=\"true\">&gt;</mo></math></script></span> 70 ppm) of K, Na, Ca, and Al reduced the capacity decay rate during cycling. Future research should focus on removing Cu and Ni from industrial electrolytes to validate performance on a larger scale.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"89 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensitivity of lipid bilayer sensing of pore-forming toxins relies on electrical properties of nanoscale-thick submembrane reservoir separating solid support and phospholipid membrane","authors":"Inga Gabriunaite ,&nbsp;Tomas Sabirovas ,&nbsp;Filipas Ambrulevičius ,&nbsp;Linas Labanauskas ,&nbsp;Ringailė Lapinskaitė ,&nbsp;Arturas Polita ,&nbsp;David J. Vanderah ,&nbsp;Gintaras Valincius ,&nbsp;Aušra Valiūnienė","doi":"10.1016/j.electacta.2025.146189","DOIUrl":"10.1016/j.electacta.2025.146189","url":null,"abstract":"<div><div>The comparative study of two types of tethered bilayer membranes (tBLMs), one formed on atomically smooth gold films and the other on fluorine-doped tin oxide (FTO) films on glass is reported. These solid substrates exhibited different surface morphology and roughness. After tailoring with thiol or silane compounds, both formed intact tBLMs as demonstrated by electrochemical impedance spectroscopy (EIS). In contrast to the flat Au surfaces, the FTO substrates showed the presence of local water pockets, which caused a lower electrical resistance of the submembrane space separating the bilayers and the solid substrate.</div><div>The EIS data analysis showed that the residual lateral defects, with an average radius between 10 and 20 nm, are heterogeneously distributed over the surface of the tBLMs. The concentration of defects on the surface is very low, ranging from 10 to 30 defects per 1000 μm². Both types of tBLMs responded to the pore-forming toxin, the α-hemolysin (αHL) from <em>Staphylococcus aureus</em> in a concentration dependent manner. The EIS response and the sensitivity to the toxin were stronger for tBLMs on FTO than on Au. We show that, independent of the solid substrate, the property that affects the sensitivity of tBLM sensors to membrane-damaging toxins is related to the resistance of the submembrane reservoir. The lower the resistance, the higher the sensitivity. Although we cannot exclude other factors such as membrane composition, buffer salts, and pH, we conclude that, in general, submembrane resistance is the fundamental factor determining the sensitivity of tBLM sensors.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146189"},"PeriodicalIF":5.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of SBPBF₄ addition in Acetonitrile- and Linear Carbonate-based Electrolytes: Improving Voltage Stability and Reducing Gas Evolution in Supercapacitors","authors":"Tsukasa Ueda, Yu Chikaoka, Shogo Matsuoka, Natsuki Miyashita, Kenji Ohshima, Yume Habuka, Wako Naoi, Etsuro Iwama, Patrice Simon, Katsuhiko Naoi","doi":"10.1016/j.electacta.2025.146178","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146178","url":null,"abstract":"Electric double-layer capacitors (EDLCs), or supercapacitors, are high-performance energy storage devices known for their superior power density, rapid charge-discharge capabilities, and long cycle life. The electrolyte composition, specifically the choice of solvent and salt, plays a critical role in determining the voltage range, energy efficiency, and cycle lifespan of EDLCs. This study explores the novel electrolyte spiro-1,1-bipyrolidinium tetrafluoroborate (SBPBF₄), selected for its high solubility and outstanding electrochemical stability at elevated voltages. SBPBF₄, with its unique cyclic structure among quaternary ammonium salts, offers advantages particularly suited for high-voltage applications.This study investigates SBPBF₄ in low-viscosity solvents, namely acetonitrile (AN) and dimethyl carbonate (DMC), chosen for their complementary properties that could further enhance SBPBF₄’s performance. A central focus is on the electrolyte's impact on stability and gas generation in both symmetrical AC//AC and hybrid LTO//AC configurations. Findings indicate that SBPBF₄ enhances float durability and minimizes gas generation, an effect attributed to the resistance of the SBP⁺ cation to Hofmann elimination. This resistance interrupts degradation cycles typically triggered by interactions between residual water and solvents, stabilizing the electrolyte and preventing reductive decomposition at the negative electrode surface. Understanding these mechanisms is essential for optimizing low-viscosity solvent-based electrolytes and ensuring reliable operation in EDLCs and hybrid supercapacitors.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"59 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic Bi active sites decorated graphite felt derived from bismuth-based metal−organic framework boosting vanadium redox flow battery performance","authors":"Liu Yang, Zihao Fan, Fujun Cui, Taolong Wu, Tingxu Fang, Yujie Guo, Li Tian, Bo Pang, Gaohong He, Xuemei Wu","doi":"10.1016/j.electacta.2025.146190","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146190","url":null,"abstract":"Vanadium redox flow battery (VRFB) is promising large-scale energy storage technology for renewable energies, while the sluggish kinetics of vanadium redox reaction restricts the efficiency at high current density. Herein, the strategy of boosting V²⁺/V³⁺ redox reaction by atomic Bi active sites decorated graphite felt electrode derived from bismuth-based metal−organic framework (Bi-MOF) is proposed. Bi-MOF, dispersing abundant Bi metal sites on porous carrier, helps the Bi atoms to form atomic active sites easily by coordinating with N through the nitrogen source mediated carbonization process. Porous nanobundles of atomic Bi catalyst uniformly bind to the graphite felt, exhibiting over 2 folds increase in specific surface area, higher V²⁺/V³⁺ redox peak currents and reversibility, and one order of magnitude lower of charge-transfer resistance. The atomic Bi active sites decorated graphite felt negative electrode achieves high VRFB performance even with the vanadium ions heavily permeable Nafion membrane, showing 13.1 % higher energy efficiency at 200 mA cm^–2 (80.2 % <em>vs.</em> 70.9%), 68.1% increase in electrolyte utilization comparing to the pristine graphite felt, and keeping stable during 1500 charge/discharge cycles. The performance is superior to the reported metal−organic frameworks (MOFs)-derived catalyst decorated electrodes.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"29 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New insights into Rh-Pt electrocatalysts with low Pt content for ethanol electro-oxidation reaction","authors":"Nelson Alexandre Galiote, Camilo A. Angelucci, Vinicius Del Colle, Germano Tremiliosi-Filho","doi":"10.1016/j.electacta.2025.146084","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146084","url":null,"abstract":"In this work, a new strategy to incorporate smaller amounts of Pt atoms, an active material, in an inactive Rh matrix, forming metallic nanoalloys dispersed on carbon of high surface area (Black Pearls® - BP) results in synergistic materials that have much better activity for CO₂ formation and robustness toward the ethanol oxidation reaction (EOR) in acid media when compared to the pure Pt material. The results are discussed based on crystal lattice parameter modifications focusing mainly on the lattice strain and, consequently, the electronic modification at the Pt sites. Those modifications lead to different ethanol adsorption as ethoxide termination, better long-term EOR activity, and better CO₂ production than pure Pt which normally is not observed for most electrocatalysts studied in the literature. Therefore, these are possible key materials to develop and foster direct alcohol fuel cells.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"81 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Achieve an atomic-level understanding of the anion/concentration effect on transport properties for aqueous zinc halide electrolytes","authors":"Bochun Liang ,&nbsp;Tairan Wang ,&nbsp;Huan Chen ,&nbsp;Yaqin Zhang ,&nbsp;Xinyao Ma ,&nbsp;Jun Fan","doi":"10.1016/j.electacta.2025.146165","DOIUrl":"10.1016/j.electacta.2025.146165","url":null,"abstract":"<div><div>Despite the growing research interest in aqueous zinc-ion batteries (AZIBs), the detailed atomic-level understanding of the structure-property relationship in AZIBs electrolytes remains incomplete. In this study, we employ molecular dynamics simulations to study the properties of three zinc halide salt electrolytes (ZnCl₂, ZnBr₂, and ZnI₂) at concentrations ranging from 0.44 m to 4 m. We observed the diffusion coefficients decrease as the concentration increases, and the overall diffusion coefficients follow the sequence of ZnI₂ &gt; ZnBr₂ &gt; ZnCl₂. Further study revealed that this is attributed to the different degrees of ion clustering and the resultant disruption of the water network across different systems. Notably, we found that ionic conductivities of all three salts increase first and then decrease beyond an inflection point as the concentration rises, which is closely associated with the proportion of Zn²⁺ in solvent-separated ion pairs (SSIPs). We further expanded this method to other electrolytes, such as Zn(CF₃SO₃)₂, ZnSO_4, and MgCl₂, validating the method's applicability in divalent metal ion electrolytes. Ion-exchange dynamics analysis reveals the underly mechanisms of SSIPs that influence the ion transport behaviors. This work aims to deepen the understanding of aqueous zinc salt electrolytes and inform the design of high-performance AZIBs.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146165"},"PeriodicalIF":5.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co-deposition of Co, Ni, and Ru from the choline chloride-ethylene glycol deep eutectic solvent","authors":"Renata Palowska ,&nbsp;Marcin Kozieł ,&nbsp;Agnieszka Brzózka ,&nbsp;Grzegorz D. Sulka","doi":"10.1016/j.electacta.2025.146179","DOIUrl":"10.1016/j.electacta.2025.146179","url":null,"abstract":"<div><div>In this research, we explore the co-deposition of Co, Ni, and Ru from ethaline – a mixture of choline chloride and ethylene glycol in a 1:2 molar ratio. Co, Ni, and Ru were co-deposited from ethaline-based solutions containing their respective chloride salts, with LiCl and H₂SO₄ added in some cases. Deposition was carried out at constant potentials ranging from -1.00 V to -1.34 V, at 70 °C, for up to 4 h. The morphology of the resulting deposits was examined using scanning electron microscopy, while their composition was analyzed by energy-dispersive X-ray spectroscopy and X-ray diffraction. The obtained Co-Ni deposit morphologies ranged from mostly smooth, dense layers to platelets and dendritic formations, influenced by the presence of H₂SO₄ and LiCl in the solution. In contrast, the addition of Ru resulted in a more porous, netlike deposit. Composition analyses confirmed the presence of all three target elements but showed a significant reduction in Co content in deposits obtained from multi-component baths. Selected Co-Ni-Ru deposits were tested as hydrogen evolution catalysts in 1.0 M KOH and 0.5 M H₂SO₄, where they showed good activity.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146179"},"PeriodicalIF":5.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the effect of particle size and size standard deviation on lithium-ion concentration and discharge behavior of heterogeneous electrode","authors":"Junpei Wang,&nbsp;Shaohai Dong,&nbsp;Yuhang Lyu,&nbsp;Zhan-Sheng Guo","doi":"10.1016/j.electacta.2025.146176","DOIUrl":"10.1016/j.electacta.2025.146176","url":null,"abstract":"<div><div>With the growing demand for electric vehicles and renewable energy storage, enhancing battery energy density has become a focal point of current research. Increasing electrode thickness is an effective strategy, but it is accompanied by the complexification of the microstructure, leading to reduced lithium-ion transport efficiency. In particular, the particle size and size standard deviation of active materials significantly influence the electrode microstructure. This study developed a new MATLAB algorithm to construct a heterogeneous particle packing cell model, using particle radius and size standard deviation as key parameters. The effects of particle size and size spatial distribution on battery performance were investigated by analyzing the Li-ion concentration distribution and the depth of discharge. The results showed that the short diffusion paths of small particles facilitated more effective lithiation. Random mixing of large and small particles significantly enhanced lithium-ion transport compared to large particles alone. Furthermore, the standard deviation of particle size had a notable impact on battery performance, and electrodes with different particle radii exhibited different sensitivities to this standard deviation. An optimal particle size standard deviation was identified that could enhance lithium-ion diffusion and improve rate performance. Additionally, the spatial distribution of particle sizes along the electrode thickness also affected lithium-ion transport behavior. The lithium-ion transport results under these different particle distributions provide valuable insights for the design of electrode microstructures, potentially advancing battery technology.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146176"},"PeriodicalIF":5.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A square filter-press alkaline water electrolyzer for wide power range operation via flow enhancement and parasitic current suppression","authors":"Si-Tong Liu ,&nbsp;Run-Xia He ,&nbsp;Zhen-Guo Guo ,&nbsp;Bing Li ,&nbsp;Fang Li ,&nbsp;Jun Ding ,&nbsp;Jian-Bo He","doi":"10.1016/j.electacta.2025.146186","DOIUrl":"10.1016/j.electacta.2025.146186","url":null,"abstract":"<div><div>Hydrogen production via direct water electrolysis under conditions of large power fluctuations presents a major challenge in renewable energy storage applications. This study introduces a novel square filter-press alkaline water electrolyzer featuring independent gas outlet manifolds, specifically developed to ensure efficient hydrogen production across a wide range of power fluctuation conditions. Compared with conventional circular electrolyzer designs, the modified configuration demonstrated enhanced gas purity and Faradaic efficiency even at low current densities (as low as 10 mA cm^-2). Additionally, the new design achieved reduced electrolysis voltages, especially at higher current densities. These performance improvements are attributed to optimized manifold structures that enable efficient gas evacuation, thereby minimizing inefficiencies caused by gas bubble entrapment. The study also identifies and analyzes two types of parasitic currents, LPPC and SPPC, to better understand and mitigate their impact on both gas purity and electrolysis efficiency. These innovations significantly expand the operational power range of electrolyzer systems, enhancing their compatibility with renewable energy sources' inherent power fluctuations while improving overall efficiency and operational safety.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146186"},"PeriodicalIF":5.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}