Electrochimica Acta最新文献

{"title":"CuCo composite oxide synergistic catalysis: Electronic structure engineering boosts bifunctional activity for methanol fuel cells","authors":"Qingye Liu ,&nbsp;Chang Zou ,&nbsp;Jiangtao Li ,&nbsp;Xueyan Sun ,&nbsp;Wei Zhao ,&nbsp;Yilun Liu","doi":"10.1016/j.electacta.2025.147460","DOIUrl":"10.1016/j.electacta.2025.147460","url":null,"abstract":"<div><div>Direct methanol fuel cells (DMFCs), which utilize liquid methanol as fuel, exhibit a high energy density of 6.13 kWh/kg and low pollution emissions, are widely regarded as ideal \"green\" energy converters. However, electrocatalysts are poisoned by methanol dehydrogenation intermediates (CO) during methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR), which inhibits electron transfer and slows reaction kinetics. Therefore, developing a high-performance, CO-tolerant bifunctional catalyst is crucial for achieving efficient and stable operation of DMFCs. In this study, synergistic active sites were generated through interaction of bimetallic composite oxides, thereby enhancing electron transfer efficiency and optimizing both MOR and ORR processes. Experimental results demonstrate that Cu_1.5Co_1.5O₄ catalyst shows significant room for improvement, with its onset potential (E_onset = 0.857 V) and half-wave potential (E_1/2 = 0.746 V) reaching 83 % of Pt/C catalysts. Demonstrating an outstanding current density of 75.76 mA cm^-2 coupled with superior CO resistance. In DMFCs, it delivered a competitive power density of 20.45 mW cm^-2. DFT calculations confirmed that composite oxide effectively regulates the binding energies of *CO and *OH intermediates, while notably reducing the overpotential in ORR theory. The changes in adsorption strength were further validated by d- and p-band center theory. This provides new design principles for the application of CuCo compositew oxides in DMFCs technology and clean energy systems.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147460"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134233","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 Polymer Interlayer Thickness on Solid-State Battery Performance with Electrochemo-Mechanical Coupling","authors":"Pranaya Keshari Nahak, Venkatasailanathan Ramadesigan","doi":"10.1016/j.electacta.2025.147434","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.147434","url":null,"abstract":"Solid-state batteries provide higher capacity and wider electrochemical and thermal stability when used with lithium metal anode than conventional batteries. In solid-state batteries (SSBs), solid inorganic electrolytes such as Li&lt;sub&gt;7&lt;/sub&gt;La&lt;sub&gt;3&lt;/sub&gt;Zr&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt; (LLZO) offer superior ionic conductivity and safety. As the inorganic solid electrolytes (ISEs) are brittle, creating thin layers and interfaces poses mechanical problems. Also, there is a chance of lithium dendrite formation in solid inorganic electrolytes even at low currents due to the rough and rigid contact surface of inorganic electrolytes. Such problems can be alleviated by introducing a polymer interlayer between the lithium metal anode and the ISE. However, there is a difference in the Li-ion conductivity in polymer and inorganic electrolytes. Besides, the volume expansion due to ion transport is comparatively greater in polymers than in ISE. Hence, in this study, the electrochemical performance of the battery is coupled with the mechanical properties of electrode and electrolyte materials to study the effects of introducing polymer interlayer. It is observed that charge transfer overpotential increases more rapidly with time for thinner interlayer thickness cells when operated under galvanostatic conditions. When the polymer interlayer is reduced, the rate of through-plane stress generation becomes more rapid. Besides, the effect of plating, elastic, and plastic deformation on the dimension change of lithium metal anode is also studied. It is found that the dimensional change of the metal anode is more for higher current density and higher interlayer thickness. Moreover, it is obtained that 5 &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;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;&amp;#x3BC;&lt;/mi&gt;&lt;mi is=\"true\"&gt;m&lt;/mi&gt;&lt;/mrow&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=\"1.855ex\" role=\"img\" style=\"vertical-align: -0.697ex;\" viewbox=\"0 -498.8 1482 798.9\" width=\"3.442ex\" 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=\"#MJMATHI-3BC\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(603,0)\"&gt;&lt;use xlink:href=\"#MJMATHI-6D\"&gt;&lt;/use&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;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;μ&lt;/mi&gt;&lt;mi is=\"true\"&gt;m&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;μ&lt;/mi&gt;&lt;mi is=\"true\"&gt;m&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt; to 7.5 &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;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;&amp;#x3BC;&lt;/mi&gt;&lt;mi is=\"true\"&gt;m&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;' rol","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"2 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145127892","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":"Upscaling mass and electric charge transport in porous electrodes: A formal derivation of Newman’s model","authors":"Raquel Méndez-Vásquez ,&nbsp;Francisco J. Valdés-Parada ,&nbsp;Didier Lasseux","doi":"10.1016/j.electacta.2025.147417","DOIUrl":"10.1016/j.electacta.2025.147417","url":null,"abstract":"<div><div>Modeling species mass and electric charge transport in porous electrodes has been a subject of intense research over several decades using many different approaches. On the one hand, there are postulated models dedicated to specific empirical use. On the other hand, there are models derived using robust upscaling techniques. The postulated model derived by Newman’s work group is nowadays the standard starting point when performing simulations in porous electrodes. Derived upscaled models using techniques such as volume averaging or homogenization have some points in common, such as sharing similar closure problems, although they do not always lead to the same final macroscopic equations. The resulting variety of models does not provide a clear path to make a well-founded model choice for a particular application. The purpose of this work is to conciliate the use of upscaling techniques and Newman’s model by providing a detailed formal derivation of a macroscopic model using the volume averaging method and show how it coincides with Newman’s heuristic model. Connections and similarities with other previous upscaling efforts are also pointed out throughout the derivations. The present contribution helps to identify points of improvement of this well-known model to enhance its predictive capabilities in future works.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147417"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134287","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":"Grinding-exfoliated 2D transition metal dichalcogenides as scalable binders for freestanding, additive-free electrodes","authors":"Supakeit Chanarsa ,&nbsp;Panwad Chavalekvirat ,&nbsp;Sirintra Arayawate ,&nbsp;Mohamed Mallouki ,&nbsp;Atiweena Krittayavathananon ,&nbsp;Jaroon Jakmunee ,&nbsp;Pierre-Henri Aubert ,&nbsp;Pawin Iamprasertkun ,&nbsp;Kontad Ounnunkad","doi":"10.1016/j.electacta.2025.147465","DOIUrl":"10.1016/j.electacta.2025.147465","url":null,"abstract":"<div><div>Polymeric binders are an essential component of electrode preparation; however, conventional binders can result in a loss of approximately 20 % to 40 % of the active electrode weight due to the addition of conductive additives and the polymer itself. 2D pseudocapacitive binders from the transition metal dichalcogenide (TMD) family (e.g., MoS₂, MoSe₂, WS₂, WSe₂) were introduced to address this. These materials also contribute to reduced NMP consumption during electrode fabrication. The sheet-like structure of exfoliated TMDs enables van der Waals interactions between adjacent layers, effectively binding active particles together while preserving the active surface area. Notably, the use of WSe₂ as one of the TMD binders doubled the capacitance compared to conventional polymeric binders, achieving a high capacitance of 61.25 F g⁻¹ at 0.10 A g⁻¹ and delivering a power density of 2200 W kg⁻¹ at an energy density of 78 Wh kg⁻¹ for a freestanding electrode. This improvement is attributed to the pseudocapacitive nature of TMDs, which enhances charge storage. Furthermore, the WSe₂ binder exhibited excellent cycling stability, retaining 115.73 % of its capacity at a high rate after 10,000 charge/discharge cycles, enabling faster charging. This work paves the way for utilizing other 2D materials as multifunctional binders for electrode preparation, driving the continued development of energy storage design.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147465"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134229","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":"Electrode–gas interface-driven dechlorination of gaseous chlorobenzene: Mechanistic asymmetry between reductive and oxidative pathways","authors":"Muthuraman Govindan,&nbsp;Junhee Park,&nbsp;Elangovan Erusapan,&nbsp;Daekeun Kim","doi":"10.1016/j.electacta.2025.147455","DOIUrl":"10.1016/j.electacta.2025.147455","url":null,"abstract":"<div><div>Chlorobenzene (CB), a volatile and toxic halogenated compound, is a significant atmospheric pollutant emitted from industrial sources. This study investigates the electrochemical dechlorination of gaseous CB at the electrode–gas interface using a CuNi alloy foam electrode under both reductive and oxidative conditions in a PVA-SPP gel membrane-divided electrochemical cell. To enable gas-solid interaction, one half-cell operated without liquid electrolyte at ambient temperature and pressure.</div><div>Electrochemical treatment was conducted at applied potentials of −1.2 V and +1.2 V for reduction and oxidation, respectively. The oxidative pathway yielded a CB removal capacity of 24.68 mg cm⁻² min⁻¹, while the reductive route achieved 15.98 mg cm⁻² min⁻¹. Gas chromatography–mass spectrometry identified benzene as a major intermediate in both cases, but its presence in the gas phase during reduction and on the electrode surface during oxidation reflects a mechanistic divergence. Chloride ion analysis indicated approximately ∼80% total recovery, with 62% retained on the electrode and membrane in the oxidative case versus only 28% during reduction. These findings confirm that oxidative dechlorination proceeds via a surface-confined redox mechanism, whereas the reductive process involve gas-phase intermediates. Overall, this study demonstrates that the CuNi electrode–gas interface enables effective electrochemical dechlorination of gaseous CB and provides mechanistic insight into the contrasting reductive and oxidative pathways.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147455"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134231","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":"Friction assisted jet electrodeposition using variable diameter anode for enhanced uniformity of Cu-Sn coating in deep small holes","authors":"Ya Chen ,&nbsp;Shimao Shangguan ,&nbsp;Yue Zhang,&nbsp;Haozhe Pang,&nbsp;Lida Shen,&nbsp;Zongjun Tian,&nbsp;Jianfeng Zhao","doi":"10.1016/j.electacta.2025.147463","DOIUrl":"10.1016/j.electacta.2025.147463","url":null,"abstract":"<div><div>Copper-tin alloys are critical due to the excellent strength, corrosion resistance, and wide range of applications in engineering and manufacturing. However, it was a significant challenge to fabricate Cu-Sn coatings with uniform thickness and chemical composition in deep small blind holes. In this paper, a friction assisted jet electrodeposition with a variable diameter auxiliary anode was proposed. The profile of variable diameter anode was optimized by the validated multiphysics simulation. Experiments of jet electrodeposition and friction assisted jet electrodeposition (FJED) were conducted to fabricated samples. Results of characterizations showed that coatings prepared by FJED had uniform thickness and chemical composition. The hardness and adhesion were enhanced by removing hydrogen bubbles. All coatings exhibited an excellent corrosion resistance. The mechanism of FJED was revealed that the variable diameter anode improved the uniformity of coatings, and frictional brush enhanced the mechanical properties of coatings.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147463"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134565","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":"Self-supported Au–CoMn2O4/Ni foam heterostructure sensor for efficient H2O2 detection and real-time tumor biomarker monitoring","authors":"Yi-Lin Zhao, Lu-Hui Li, Li-Na Zhu, Xin Wang","doi":"10.1016/j.electacta.2025.147461","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.147461","url":null,"abstract":"Hydrogen peroxide (H₂O₂) is a crucial oxidative stress biomarker associated with various diseases, especially tumor progression and inflammatory disorders. Accurate monitoring of H₂O₂ is essential for understanding the microenvironmental dynamics involved in disease development. However, traditional metal oxide-based electrochemical sensors often suffer from low catalytic efficiency and nanoparticle aggregation.Herein, we report a high-performance, binder-free H₂O₂ sensor based on a rationally engineered Au–CoMn₂O₄/Ni foam heterostructure. This integrated architecture leverages the conductive 3D Ni foam and an interface-mediated interaction-enhanced charge transfer interface to significantly enhance sensing performance. The resulting sensor exhibits two sensitivities, 3100.04 μA·mM⁻¹·cm⁻² (2–666 μM) and 821.41 μA·mM⁻¹·cm⁻² (1.066–22.166 mM), an ultralow detection limit of 0.036 μM, and a practical linear detection range spanning 2 μM–22.166 mM (R² = 0.99). It also demonstrates excellent selectivity, long-term stability (&lt;3% signal decay over 30 days), and reproducibility (RSD ≈ 2.5%). Notably, the sensor enables real-time electrochemical monitoring of H₂O₂ released by A549 lung cancer cells under phorbol 12-myristate 13-acetate (PMA) stimulation, highlighting its potential as a platform for advanced electrochemical sensing. Importantly, the sensing mechanism can be well interpreted via interfacial structure analysis and electrochemical validation, without requiring theoretical simulations.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"25 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134235","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":"Investigation into the mechanism and performance of 4-aminopyrazolo[3,4-d]pyrimidine as a novel leveler for copper electroplating","authors":"Rui-Yi Ji,&nbsp;Zheng-Chao An,&nbsp;Yuan Han,&nbsp;Meng-Wei Lin,&nbsp;Rui Huang ,&nbsp;Fang-Zu Yang,&nbsp;Yan-Xia Jiang,&nbsp;Shi-Gang Sun","doi":"10.1016/j.electacta.2025.147457","DOIUrl":"10.1016/j.electacta.2025.147457","url":null,"abstract":"<div><div>4-aminopyrazolo[3,4-d]pyrimidine (PPA) was explored, for the first time, as a novel and high-performance leveler for acid copper (Cu) electroplating. Electrochemical characterization revealed that PPA possesses appropriate adsorption characteristics and mass transport regulation capabilities, which are crucial for achieving effective leveling performance. Chronopotentiometry and electrochemical impedance spectroscopy (EIS) under different convection intensities were used to study the leveling ability of PPA. Under strong convective conditions, the negative shift of the cathodic potential by 7mv and the increase of the charge transfer impedance with the convective intensity (90.24 Ω at 1200 rpm vs. 72.32 Ω at 200 rpm) both indicate that PPA follows a diffusion-controlled adsorption mechanism and has the ability of superconformal filling. The coordination interaction between PPA and Cu²⁺ions was systematically investigated by in-situ Fourier-transform infrared (FTIR) and proton nuclear magnetic resonance (¹H NMR) spectroscopy, and the results inferred the adsorption configuration of PPA which was anchored to the copper surface through the N-terminal of the <em>C</em> = <em>N</em> bond. The use of PPA as a leveler has been proven to yield a denser copper coating with a higher proportion of Cu (111) planes, and has achieved practical application in void-free and compact filling of PCB blind vias (150 µm × 150 µm) within 150 min.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147457"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134234","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":"Stable proton storage in α-MoO3 via a bifunctional molecular crowding electrolyte","authors":"Xiang Cai ,&nbsp;Shijun Tang ,&nbsp;Zi-min An ,&nbsp;Qiyao Shao ,&nbsp;Kuixuan Zhang ,&nbsp;Huan Liu","doi":"10.1016/j.electacta.2025.147456","DOIUrl":"10.1016/j.electacta.2025.147456","url":null,"abstract":"<div><div>Layered molybdenum trioxide (α-MoO₃) storing protons exhibits a high theoretical capacity and extraordinary rate capability and can be used as a reliable anode material for aqueous proton batteries. But a severe dissolution issue during operation always results in rapid failure in battery performance. Herein, a bifunctional molecular crowding electrolyte was engineered to address this issue. The high-concentration inert polymer, polyethylene glycol 400, reduces the free water activity of the electrolyte and the low-concentration solute, trifluoromethanesulfonic acid, forms a proton-rich electrolyte environment under such a water-poor condition thanks to its intrinsic superacidity, both of which favour the reverse shift of the dissolution equilibrium, and with the latter enabling the electrolyte with high ion conductivity as well. Thus, the α-MoO₃ electrode in the above electrolyte shows a longer lifespan without sacrificing its rate capability. The analysis on charge storage mechanisms by X-ray powder diffraction technique demonstrates that α-MoO₃ undergoes bare proton-involved multistep two-phase and solid-solution reactions, where only the two-phase reaction between hydrogen molybdenum bronze II and III phases and the solid-solution reactions of themselves are reversible.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147456"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134236","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 combined experimental and computational study on oxytetracycline electrochemical sensing: Probing the mechanism with a PtNPs/TAPB-TPA-COFs/MWCNTs-OH nanohybrid platform","authors":"Lingpu Jia ,&nbsp;Juan Hao ,&nbsp;Yuan Luo ,&nbsp;Lijuan Huang ,&nbsp;Yue Ma ,&nbsp;Yixuan Kuang ,&nbsp;Yixiang Duan ,&nbsp;Wenlong Liao ,&nbsp;Ting Cheng ,&nbsp;Kunping Liu","doi":"10.1016/j.electacta.2025.147441","DOIUrl":"10.1016/j.electacta.2025.147441","url":null,"abstract":"<div><div>Monitoring the emission of oxytetracycline (OTC) is crucial for mitigating antibiotic resistance. However, the electrochemical detection of OTC and interfacial electron transfer mechanism remain significant challenges. To address these challenges, this study developed a ternary nanocomposite sensing platform by integrating a covalent organic framework (1,3,5-tris(4-aminophenyl) benzene (TAPB)-terephthalic acid (TPA)-COFs), hydroxylated multi-walled carbon nanotubes (MWCNTs-OH), and platinum nanoparticles (PtNPs). This advanced interface enables highly sensitive and selective electrochemical detection of OTC, while also providing fundamental insights into its interfacial redox behavior. Electrochemical characterizations reveal that the PtNPs/TAPB-TPA-COFs/MWCNTs-OH/glass carbon electrode (GCE) sensor not only exhibits excellent capability in tracking the consecutive oxidation pathways of OTC, but also can sensitively detect OTC at the first oxidation peak with wide liner range from 0.09 to 907.8 μM. By integrating density functional theory computational results with electrochemical experimental evidence, the specific oxidation sites and their transfer mechanisms of OTC are successfully identified for the first time. In the actual sample detection, the sensor shows excellent anti-interference ability and recovery rate (94.4–105.6 %) for OTC in milk matrix, which provides a new technical path for the rapid detection of antibiotic residues in complex matrix.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"542 ","pages":"Article 147441"},"PeriodicalIF":5.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145116708","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}