Electrochimica Acta最新文献

{"title":"Selective Design of MOF-derived Electrocatalytic Interphases by Potential-Driven Surface Reconstruction","authors":"Sergio HernándezSalvador, Inmaculada Márquez, Silvia Gutiérrez-Tarriño, Juan José Calvente, Jose Luis del Río-Rodríguez, Pascual Oña-Burgos, Rafael Andreu, José Luis Olloqui-Sariego","doi":"10.1016/j.electacta.2025.146158","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146158","url":null,"abstract":"Metal-organic frameworks (MOFs) can be used as precursors for the directed synthesis of derived materials with enhanced performance for electrocatalysis. Herein, we report on an <em>in-situ</em> electrochemical strategy for the selective synthesis of hybrid electrocatalysts using a cobalt MOF (2D-CoMOF) as a precursor for constructing electrochemical sensors to monitor the glucose oxidation reaction (GOR). By using <em>in-situ</em> Raman spectroelectrochemistry, it is demonstrated that a precise control of the applied potential during amperometric treatment of 2D-CoMOF can promote the generation of derived heterostructures in which the original MOF coexists with metal oxides and/or oxyhydroxides (MOF-MOx) with different compositions. The so-prepared electrodes exhibit high electroactive surface areas, a high number of electrocatalytically active cobalt sites and an efficient charge transport across the catalytic film. Moreover, their composition-dependent electrocatalytic performance for the glucose oxidation reaction is examined, establishing a relationship between the applied potential, the macroscopic chemical composition of the heterostructure and the electrocatalytic performance for glucose sensing. In particular, the hybrid phases consisting of Co-MOF/Co₃O₄/CoOOH display superior electrocatalytic sensing performance with a wide linear concentration range and high sensitivity. The present work emphasizes the significance that the precise control of the applied potential has on the electrochemically-assisted MOF transformation for developing highly efficient MOF-derived electrocatalysts.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"43 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737299","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":"Cyclic Staircase Voltammetry and Cyclic Voltammetry in current and charge modes for the analysis of the responses of fast redox probes under finite diffusion","authors":"José V. Hernández-Tovar, Antonio J. Martínez-García, Manuela López-Tenés, Francisco Martínez-Ortiz, Angela Molina, Joaquín González","doi":"10.1016/j.electacta.2025.146157","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146157","url":null,"abstract":"Finite diffusion (FD) cells, that is, those involving experimental configurations with spatial restrictions that affect the overall mass transport, are becoming a very attractive way for carrying out electrochemical measurements. This experimental set-up presents numerous advantages in terms of sensitivity and simplicity in characterizing charge transfer processes. In this context, one of the most widely used tools is Cyclic Voltammetry (CV) and, although the theoretical analysis of its response under FD conditions has been previously reported (especially for the thin-layer, TL, limiting behaviour), there were some gaps that hindered its application to numerous cases of interest. The treatment presented here extend the existing CV analysis to Cyclic Staircase Voltammetry (CSCV), which is indeed the real technique applied in many digital potentiostats. Moreover, the expression for the charge-potential responses under FD conditions is reported for the first time. Thus, the converted charge is directly related with the concentration of electroactive species, and it can be measured with high reliability by following adequate experimental protocols. Two different diffusive modes are considered: bounded diffusion, corresponding to absence of mass renovation at a finite distance from the electrode, and unbounded diffusion, for which a fast mass renovation at such finite distance takes place. The general analytical expressions of the current-potential and charge-potential responses are simplified under TL conditions, leading to very simple ways for determining key parameters of the systems under study. The application of this formalism to the oxidation of a metallic complex under both configurations is presented, and practical values for the operating parameters are also discussed.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"53 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737301","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":"Amyloid–ß peptides interaction with curcumin:AFM and electrochemical characterisation","authors":"Ana-Maria Chiorcea-Paquim,&nbsp;Wesley Bruno S. Mascini,&nbsp;Ana Maria Oliveira-Brett","doi":"10.1016/j.electacta.2025.146160","DOIUrl":"10.1016/j.electacta.2025.146160","url":null,"abstract":"<div><div>The naturally occurring polyphenol curcumin found in turmeric has strong affinity for binding to amyloid beta (Aβ) peptides, a key feature of Alzheimer's disease pathology. Its structure allows curcumin to interact with the hydrophobic regions of Aβ peptides, which are crucial for β-sheet formation, inhibiting Aβ aggregation and fibril formation, destabilizing existing plaques, and reducing neurotoxicity. The time-dependent structural modifications and electrochemical behaviour of human Aβ₁₋₄₀ and Aβ₁₋₄₂ peptides following their interaction with curcumin were investigated by atomic force microscopy (AFM), differential pulse (DP) voltammetry and electrochemical impedance spectroscopy (EIS). The results showed that curcumin disrupts and slows the fibrillization process by binding to specific aromatic residues of the Aβ peptides, via curcumin methoxy and hydroxy groups, hindering the conformational changes required for fibril nucleation and elongation. This targeted binding not only influences the Aβ dynamics, reducing the extent of fibrilization, but also promotes more opened configurations that enhance the electron transfer from the electroactive amino acid residues histidine H⁶, tyrosine Y¹⁰, histidines H¹³ and H¹⁴, and methionine M³⁵ to the electrode surface, due to their direct interaction with curcumin and/or their proximity to other curcumin binding sites, consistent with the curcumin inducing the formation of soluble less toxic species. This dual ability to slow fibril formation and induce the formation of unconventional Aβ_1–40 and Aβ₁₋₄₂ monomeric, oligomeric, prefibrillar, and flexible fibrillar species highlights curcumin potential as a therapeutic agent in Alzheimer's disease.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146160"},"PeriodicalIF":5.5,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737307","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 High-Rate Material for Sodium-Ion Batteries: Bi/Zr Co-Doped Na0.44Mn0.97Bi0.01Zr0.02O2/CNT Composites","authors":"Huaxu Gong, Yin Zhang, Zhe Jiao, Wutao Mao, Linlin Wang","doi":"10.1016/j.electacta.2025.146156","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146156","url":null,"abstract":"Among the diverse cathode materials for sodium-ion batteries (SIBs), Na_0.44MnO₂ has gained significant attention due to its stable 3D tunneling structure, low cost, and promising electrochemical performance. However, its widespread application is limited by poor diffusion kinetics and insufficient rate capability. Traditional doping or surface modification techniques often fail to adequately address these challenges. In this work, we present an innovative strategy that combines Bi and Zr co-doping with the incorporation of carbon nanotubes (CNT) to improve the electrochemical performance of Na_0.44MnO₂. Na_0.44Mn_0.97Bi_0.01Zr_0.02O₂/CNT composites were synthesized via a combination of solid-state reactions and spray-drying methods. The co-doping of Bi and Zr significantly improves the diffusion kinetics of and enhances cycling stability, while the CNT improve electronic conductivity, resulting in outstanding rate capability and cycling stability. The composite delivers a high discharge capacity of 102.26 mAh g^-1, maintaining 87.2% of its initial capacity after 1000 cycles and 72.4% after 2000 cycles at 5C, showcasing exceptional high-rate cycling performance. This study presents an effective strategy for enhancing Na_0.44MnO₂ cathodes and offers important insights for the development of advanced energy storage technologies.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"36 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737305","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":"Volumetric Properties Modeling in Unsaturated Solutions of the Ternary Na2SO4 – H2SO4 – H2O and MgSO4 – H2SO4 – H2O Systems from 298.15 to 318.15 K and at 101.3 kPa Using the Pitzer Equations","authors":"Aldo N. Fuentes, Martha Claros, Yahaira Barrueto, Yecid Jiménez, Francisca J. Justel","doi":"10.1016/j.electacta.2025.146155","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146155","url":null,"abstract":"This work presents a modeling approach to describe the volumetric properties in unsaturated solutions of the ternary Na&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt; – H&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt; – H&lt;sub&gt;2&lt;/sub&gt;O and MgSO&lt;sub&gt;4&lt;/sub&gt; – H&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt; – H&lt;sub&gt;2&lt;/sub&gt;O systems from 298.15 to 318.15 K and at 101.3 kPa using the Pitzer equations, incorporating the partial dissociation of &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msubsup is=\"true\"&gt;&lt;mtext is=\"true\"&gt;HSO&lt;/mtext&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;&amp;#x2212;&lt;/mo&gt;&lt;mo is=\"true\"&gt;&amp;#x2212;&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"3.009ex\" role=\"img\" style=\"vertical-align: -0.812ex;\" viewbox=\"0 -945.9 3286.5 1295.7\" width=\"7.633ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-48\"&gt;&lt;/use&gt;&lt;use x=\"750\" xlink:href=\"#MJMAIN-53\" y=\"0\"&gt;&lt;/use&gt;&lt;use x=\"1307\" xlink:href=\"#MJMAIN-4F\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(2085,432)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2212\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(550,0)\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2212\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(2085,-286)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-34\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msubsup is=\"true\"&gt;&lt;mtext is=\"true\"&gt;HSO&lt;/mtext&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;msubsup is=\"true\"&gt;&lt;mtext is=\"true\"&gt;HSO&lt;/mtext&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;. These systems contain two salts that form part of the electrolytic environment found in salt lakes brines in the north of Chile, which are used to produce lithium compounds.The densities measured in this study for ternary systems exhibited trends consistent with changes in concentration and temperature, with Na&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt;(aq) and MgSO&lt;sub&gt;4&lt;/sub&gt;(aq) having a greater impact on densities compared to H&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt;(aq).New volumetric parameters for the H&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt; – H&lt;sub&gt;2&lt;/sub&gt;O system was obtained and their volumetric interaction coefficients in ternary mixtures with Na&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt;(aq) and MgSO&lt;sub&gt;4&lt;/sub&gt;(aq) in water were determined at 298.15, 308.15, and 318.15 K, incorporating the partial dissociation of &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"76 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737306","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":"Chemical and electrochemical surface treatments to grow magnesium hydroxystannate/manganese stearate coating for tuning biodegradation rate of AZ31 for bioresorbable implants","authors":"V. Verro ,&nbsp;F. Di Franco ,&nbsp;F. Carfì Pavia ,&nbsp;F. La Monica ,&nbsp;M. Santamaria","doi":"10.1016/j.electacta.2025.146159","DOIUrl":"10.1016/j.electacta.2025.146159","url":null,"abstract":"<div><div>A double layered coating was deposited on AZ31 to tune biodegradation rate of this alloy in physiological solution at 37°C. A first chemical conversion process in a stannate ions containing alkaline solution was carried out on AZ31 to induce the growth of a MgSn(OH)₆ layer constituted by closely packed spheres. A manganese stearate (<span><math><mrow><mi>Mn</mi><msub><mrow><mo>[</mo><mi>C</mi><msub><mi>H</mi><mn>3</mn></msub><msub><mrow><mo>(</mo><mi>C</mi><msub><mi>H</mi><mn>2</mn></msub><mo>)</mo></mrow><mn>16</mn></msub><mi>COO</mi><mo>]</mo></mrow><mn>2</mn></msub></mrow></math></span>) layer was electrodeposited on the magnesium hydroxystannate to make the surface of the alloy hydrophobic. The resulting coating allowed to increase the corrosion resistance in Dulbecco's Modified Eagle Medium (DMEM) at 37°C, as assessed by recording polarization curves and electrochemical impedance spectra. Hydrogen evolution rate in DMEM, directly measured using gas chromatography to avoid misleading information due to negative difference effect, was reduced by the coating since the early stage of immersion. According to cytotoxicity tests with MC3T3 pre-osteoblastic cells, the coating resulted biocompatible.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146159"},"PeriodicalIF":5.5,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737300","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":"Highly Selective Cobalt-MOF/Vanadium Carbide MXene Hydrogel for Simultaneous Electrochemical Determination of Levothyroxine and Carbamazepine in Simulated Blood Serum","authors":"Manaswini Ravipati, Divyasri Ramasamy, Sushmee Badhulika","doi":"10.1016/j.electacta.2025.146154","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146154","url":null,"abstract":"The accurate and simultaneous detection of Levothyroxine (LT4) and carbamazepine (CBZ) in biological samples remains a critical challenge in biomedical sensing, given the need for high sensitivity, selectivity, and stability in complex biological environments. This work presents the synthesis and electrochemical characterization of a novel MOF-71/V₂C MXene-based hydrogel (Cobalt Metal-Organic Framework/Vanadium Carbide MXene) as an advanced sensor for the concurrent and simultaneous detection of Levothyroxine (LT4) and Carbamazepine (CBZ). The MOF-71/V₂C MXene-based Hydrogel is synthesized using a solvothermal technique and subsequent freeze-drying process. Structural characterization studies confirm a stable, porous interconnected layered architecture with a high surface area, facilitating effective interaction with target analytes. XRD (X-ray Diffraction) and CA (Contact Angle) analysis validate the crystalline and hydrophilic character of the material, respectively. The MOF-71/V₂C MXene-based hydrogel sensor exhibits a wide linear detection range (10 nM to 100 µM for LT4 &amp; 10 nM to 500 µM for CBZ), excellent selectivity against prevalent interfering species, i.e., Dopamine, Tyrosine, glucose (GLU), urea, Mg²⁺, Ca²⁺, prevalent in biological fluids, and a low detection limit (LOD) of 5.6 nM for LT4 and 6.7 nM for CBZ. In addition, MOF-71/V₂C MXene hydrogel showed outstanding electrochemical stability and high reproducibility with RSDs of 1.65% for LT4 and 2.81% for CBZ, ensuring stable long-term performance. These results underscore the utility of the MOF-71/V₂C MXene-hydrogel as a high-sensitivity electrochemical sensor for therapeutic drug monitoring. Its highly hydrophilic and porous structure presents an electrochemical reaction-facilitating environment such that the sensor retains high sensitivity even in biologically complex matrices like blood serum. The adaptability of the hydrogel also presents favorable possibilities for incorporation in flexible and wearable electrochemical devices, presenting an important contribution in the area of biomedical sensing.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"28 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736548","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":"Boosted electrochemical performance of sodium-ion batteries via Sn-Fe binary metal sulfides as anode materials","authors":"Yilin Wang ,&nbsp;Xiaotian Yang ,&nbsp;Shengjun Yuan ,&nbsp;Ting Hu ,&nbsp;Hao Xie ,&nbsp;Fan Yang ,&nbsp;Qiaolin Ren ,&nbsp;Qiming Liu","doi":"10.1016/j.electacta.2025.146148","DOIUrl":"10.1016/j.electacta.2025.146148","url":null,"abstract":"<div><div>The escalating demand for sustainable energy storage solutions has intensified the pursuit of advanced sodium-ion batteries (SIBs) as a cost-effective alternative to lithium-ion batteries. Central to this endeavor is the development of high-performance anode materials. In this study, we synthesized Sn-Fe binary metal sulfides as a promising anode material for SIBs, focusing on enhancing electrochemical performance through the modulation of Sn/Fe ratios. We discovered that adjusting the Sn/Fe composition not only optimizes the electrochemical activity window in half-cells but also significantly boosts the energy density in full-cell configurations. The synthesized Sn-Fe sulfides demonstrated superior capacity of 117.8 mAh g⁻¹ at 0.1C after 100 cycles, attributes pivotal for the practical application of SIBs. Our findings underscore the potential of Sn-Fe binary metal sulfides as a viable anode material for next-generation SIBs, offering a pathway to improved energy storage technologies. This work provides insights into the design principles for advanced anode materials and paves the way for further material optimization and applications in sodium-ion battery systems.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146148"},"PeriodicalIF":5.5,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734427","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":"Enhanced Anodic Stripping Voltammetric Detection of Cd(II) Using a Glassy Carbon Electrode Modified with N, N-Dimethyl-1-Aminoanthraquinone Decorated Nickel Ferrite and Graphene Oxide Sheets","authors":", Randeep Kaur, Shweta Rana, Navneet Kaur","doi":"10.1016/j.electacta.2025.146122","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146122","url":null,"abstract":"The study demonstrates the fabrication of <strong>DNG</strong> via a sonochemical route from an anthraquinone-based compound (N,N-dimethyl-1-amino-anthraquinone) intricately combined with nickel ferrite-embedded graphene oxide and tailored for the electrochemical sensing of hazardous Cd²⁺ ions. Structural (Raman, XRD) and morphological (FE-SEM and HRTEM) studies confirm the successful fabrication of nanocomposite. Herein, an anthraquinone derivative (<strong>DAAQ</strong>) serves as a key functional group, offering abundant binding sites further amplified by the synergistic interaction between NF (distinguished by its substantial surface area) and <strong>GO</strong> (renowned for its exceptional electrical conductivity). The charge transfer resistance, electrochemically active surface area, and electron transport pathways at the electrode-electrolyte interface were all better understood by CV and EIS analysis. The sensing platform demonstrated SWASV determination of Cd²⁺ within the concentration range of 0.1 to 8 μM with a quantification limit of 8.0 nM and an outstanding detection limit of 2.5 nM. High sensitivity (5.78 mA μM^-1) and remarkable reproducibility (RSD ∼ 2.39%) of stable DNG electrodes for targeted analytes highlights its potential to reveal new avenues in electroanalytical applications.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"183 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734426","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":"Three-dimensional hierarchical mesoporous rose-like SnSe2/N-doped carbon anode materials for long-life sodium ion batteries","authors":"Zhiya Lin ,&nbsp;Yanan Du ,&nbsp;Zhilong Wu ,&nbsp;Maoxin Yu ,&nbsp;Hai Jia ,&nbsp;Xiaohui Huang ,&nbsp;Shaoming Ying","doi":"10.1016/j.electacta.2025.146149","DOIUrl":"10.1016/j.electacta.2025.146149","url":null,"abstract":"<div><div>Sodium-ion batteries (SIBs) show significant promise for large-scale energy storage applications, owing to their plentiful resources and environmental advantages. However, their practical deployment faces challenges primarily due to inadequate rate performance and cycling stability. A key factor contributing to these issues is the larger size of Na-ions, which leads to diminished structural integrity and slower reaction kinetics. However, ongoing research and development efforts are paving the way for overcoming these challenges, bringing SIBs closer to becoming a viable alternative to Li-ion batteries (LIBs) in various applications. In this study, three-dimensional hierarchical mesoporous rose-like SnSe₂@N-doped carbon (RL-SnSe₂@NC) was fabricated using solvothermal and selenizing techniques. Consequently, RL-SnSe₂@NC demonstrated an exceptionally high specific capacity of 332.8 mA h g^-1 for SIBs at a rate of 5 A g^-1 after 3000 cycles. Ex situ XRD, XPS, HRTEM and SAED analyses were conducted to investigate the changes in crystal structure that occur between sodium (Na) and SnSe₂ during the charge and discharge processes. Furthermore, when paired with Na₃V₂(PO₄)₃ (NVP) as the cathode in a sodium-ion full cell, the optimized configuration featuring RL-SnSe₂@NC as the anode demonstrates outstanding performance. Notably, this remarkable material attains an impressive capacity of 220.9 mAh g^-1 at a current density of 1 A g^-1, operating within the voltage range of 0.5 to 4.0 V.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"525 ","pages":"Article 146149"},"PeriodicalIF":5.5,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734425","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}