Journal of Electroanalytical Chemistry最新文献

{"title":"Advances in voltammetric and chronoamperometric techniques derived from square-wave voltammetry","authors":"Valentin Mirceski","doi":"10.1016/j.jelechem.2026.119908","DOIUrl":"10.1016/j.jelechem.2026.119908","url":null,"abstract":"<div><div>Square-wave voltammetry (SWV), regarded as the most advanced technique within the family of pulse voltammetric methods, still offers substantial room for methodological innovation in terms of SWV itself and for voltammetry more broadly. By comparatively reviewing the novel SWV-derived techniques introduced in the past decade, it becomes evident that methodological advances can emerge along several conceptual directions, including: modification of the current-sampling protocol, alteration of the SW potential modulation, new strategies for processing current–time–potential data, and simplification of the technique toward square-wave chronoamperometry–type methodologies.</div><div>Accordingly, we present three novel voltammetric techniques—multi-sampling SWV, double-sampled SWV, and differential SWV, together with three square-wave chronoamperometric methods collectively known as electrochemical Faradaic spectroscopy (EFS). These new approaches aim to enhance the voltammetric and chronoamperometric capabilities of the technique and its analytical application, enabling comprehensive mechanistic and kinetic characterization of electrode processes with a minimal number of experiments, ideally a single one.</div><div>Finally, we introduce a completely new type of voltammetry, termed <strong>multi-frequency SWV</strong>, which integrates the advantages of the a forementioned innovations into a unified methodology, thereby further expanding the conceptual and practical scope of modern voltammetric analysis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119908"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of interlayer design on the corrosion mechanism of high strength 6061MOD-based four-layer cladding aluminum alloy in OY solution","authors":"Qi Cao ,&nbsp;Na Zhao ,&nbsp;Tianyi Yang ,&nbsp;Chen Yang ,&nbsp;Long Cheng ,&nbsp;Hui Liu ,&nbsp;Dejing Zhou","doi":"10.1016/j.jelechem.2026.119888","DOIUrl":"10.1016/j.jelechem.2026.119888","url":null,"abstract":"<div><div>To address the need for lightweight and long-lasting liquid cooling plates in new energy vehicles, this study introduces a novel high strength four-layer cladding structure, involving two alloys. The core material is high-strength 6061MOD aluminum alloy, with 4045 as the brazing layer. Interlayers of 3003MOD and 1050MOD are also included, respectively. The corrosion behavior in an acidified chloride-containing environment within the liquid cooling plate was examined via cyclic corrosion testing in OY solution. Combined with electrochemical tests such as OCP, and microscopic characterization techniques including OM, SEM, EBSD, EPMA, XPS and TEM, the influence mechanism of the interlayer alloy on the material's corrosion resistance was systematically analyzed. The results show that the alloy with a 1050MOD interlayer exhibits superior corrosion resistance (corrosion depth of 550 μm vs. 1016 μm). Its coarse elongated grain structure, lower proportion of high-angle grain boundaries, low dislocation density, strong cubic texture {100}⟨001⟩, and stable corrosion product film effectively inhibit pitting initiation and intergranular propagation, forming a typical layered corrosion morphology, significantly delaying the expansion of corrosion to the core material and reducing the corrosion rate. This research provides crucial theoretical and experimental support for using high-strength, corrosion-resistant multi -layer cladding aluminum alloys in liquid cooling plates.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119888"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"“Armored hollow spheres”: In situ Polypyrrole encapsulation enables robust Mn₂O₃ cathodes for high-performance aqueous zinc-ion batteries","authors":"Xin Li ,&nbsp;Yuting Zhao ,&nbsp;Linwen Li ,&nbsp;Tiantian Zhu ,&nbsp;Yiwei Tian ,&nbsp;Hailun Lu ,&nbsp;Jiacheng Wen ,&nbsp;Fuxiang Wei ,&nbsp;Yanwei Sui ,&nbsp;Bin Xiao","doi":"10.1016/j.jelechem.2026.119909","DOIUrl":"10.1016/j.jelechem.2026.119909","url":null,"abstract":"<div><div>Aqueous zinc-ion batteries (AZIBs) are considered promising alternatives to lithium-ion batteries due to their inherent safety, low cost, and environmental friendliness. However, the practical application of manganese-based cathodes such as Mn₂O₃ is hindered by structural instability and poor conductivity. Herein, a hollow core–shell Mn₂O₃@polypyrrole (PPy) composite is rationally designed and fabricated through a combined hydrothermal and in situ oxidative polymerization approach. The conformal PPy coating enhances electronic conductivity, suppresses Mn dissolution, and cooperates with the hollow architecture to accommodate volume variation during cycling. As a result, the Mn₂O₃@PPy cathode delivers a high reversible capacity of 227 mAh g⁻¹ at 0.2 A g⁻¹, superior rate capability, and remarkable cycling stability with a capacity retention of 43 mAh g⁻¹ after 1000 cycles at 1 A g⁻¹. Kinetic analysis reveals a mixed capacitive-diffusion controlled charge storage mechanism, while ex-situ XRD confirms the highly reversible co-(de)intercalation of Zn²⁺ and H⁺. This work offers an effective structural-engineering strategy to develop durable manganese-based cathodes for advanced aqueous energy storage systems.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119909"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-performance flexible supercapacitors based on nitrogen-doped carbon nanotubes derived from ZIFs at low temperature","authors":"Jiaxin Yang,&nbsp;Tian Lv,&nbsp;Keyi Dong,&nbsp;Weiyang Tang,&nbsp;Quanhu Sun,&nbsp;Zefeng Yan,&nbsp;Yan Tan,&nbsp;Yu Wang,&nbsp;Tao Chen","doi":"10.1016/j.jelechem.2026.119912","DOIUrl":"10.1016/j.jelechem.2026.119912","url":null,"abstract":"<div><div>Nitrogen-doped carbon nanotubes (NCNTs) have attracted considerable interest as promising electrode materials for supercapacitors (SCs) due to their exceptional electrical conductivity, robust mechanical properties, and readily tunable surface chemistry, but often suffer from their limited specific surface area and a scarcity of electrochemically active sites. In this work, we present a novel approach to synthesize NCNTs via pyrolysis of zeolitic imidazolate frameworks (ZIFs) at a low temperature of 500 °C for high-performance flexible SCs. The synthesized NCNTs exhibit a hierarchical porous architecture with high nitrogen content (12.22%), which contributes to enhanced pseudocapacitive performance. Using the NCNTs as the electrode and a polyvinyl alcohol /LiCl gel as electrolyte, the developed SC exhibits a high specific capacitance of 411 mF cm⁻² at a current density of 0.5 mA cm⁻² and excellent cyclic stability up to 90% of its original capacitance after 25,000 charge/discharge cycles. Furthermore, the SCs can well maintain their performance under various bending angles and repeated bending cycles, suggesting excellent flexibility.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119912"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced borohydride oxidation kinetics with Au@MOF-808 nanocomposite electrocatalysts with ultra-low Au loading","authors":"Ines Belhaj ,&nbsp;J. Alexander Becker ,&nbsp;Alexandre M. Viana ,&nbsp;Filipe M.B. Gusmão ,&nbsp;Miguel Chaves ,&nbsp;Eulália Pereira ,&nbsp;Biljana Šljukić ,&nbsp;Salete S. Balula ,&nbsp;Luís Cunha-Silva ,&nbsp;Diogo M.F. Santos","doi":"10.1016/j.jelechem.2026.119920","DOIUrl":"10.1016/j.jelechem.2026.119920","url":null,"abstract":"<div><div>The highly stable metal-organic framework (MOF) composed of [Zr₆O₄(μ₃-OH)₄(OH)₆(H₂O)₆(BTC)₂]·nH₂O units (MOF-808) was modified by incorporating gold (Au) nanoparticles and functional groups to enhance electrocatalytic activity for the borohydride oxidation reaction (BOR). Three composite materials (Au@MOF-808, Au@MOF-808-NH₂, and Au@MOF-808-SH) were prepared by the incorporation of Au in structurally related MOFs, MOF-808, MOF-808-NH₂, and MOF-808-SH, respectively. These composite materials were evaluated as anodic electrocatalysts for BOR in alkaline media using cyclic voltammetry and chronoamperometry. Among the prepared materials, Au@MOF-808-NH₂ exhibited the highest BOR activity, with an apparent activation energy of 15.3 kJ mol⁻¹, a reaction order of 0.6, an anodic charge transfer coefficient of 0.63, and a number of exchanged electrons of 4.4. The latter was significantly below the theoretical eight-electron value, indicating the presence of alternative reaction pathways. Notably, this material achieved a high mass-specific BOR peak current of 4.23 A μg_Au⁻¹, demonstrating outstanding electrocatalytic efficiency despite the ultralow noble metal loading. These results underscore the potential of Au@MOF-808-NH₂ as a cost-effective and scalable anodic electrocatalyst for high-performance direct borohydride fuel cells.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119920"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Pseudo one dimensional model to describe the kinetic limitations in lithium–sulfur batteries","authors":"Tommaso Filippo Lupatelli ,&nbsp;Massimo Santarelli ,&nbsp;Silvia Bodoardo ,&nbsp;Daniele Versaci","doi":"10.1016/j.jelechem.2026.119915","DOIUrl":"10.1016/j.jelechem.2026.119915","url":null,"abstract":"<div><div>In the latest years Lithium sulfur batteries (Li<img>S) have reached a wide interest in the research field as suitable candidate as post Lithium-ion batteries, due to their high theoretical specific capacity and potentially lower cost. However, their practical implementation is still hindered by several challenges principally related to the intrinsic chemistry of such system. Here is proposed a new modelling approach, a pseudo-one-dimensional (P1D) modelling framework is employed to investigate the role of polysulfides transport and precipitation kinetics as sources for reversible capacity losses, while guaranteeing low computational cost and avoiding mesh implementation. The model is parameterized on a CR2032 coin cell and validated against experimental discharge data over a broad current range, starting from 0.1C up to 1C. The model faithfully reproduces the characteristic two-plateau discharge profile and the supersaturation point associated with peak internal resistance. Providing a capacity reduction above 250[mAhg⁻¹], primarily affecting the second voltage plateau, by increasing the current rate from 0.1C to 1C. Correlating the accumulation of intermediate polysulfides within the separator at high rates to reversible capacity losses, with concentrations up to five times higher compared to lower discharge rates. The framework discussed allows also to highlight the relationship between electrolyte viscosity, Li₂S_(s) precipitation kinetics, and internal resistance at different current intensity. Simulating an increase of the internal resistance of almost 50%, coupled also with a shift of the peak respect the state of discharge. The results proved the ability of the model to describe one of the major issues of lithium sulfur battery highlighting, at microscale level, its contribution on the precipitation kinetic, resistivity and its influence on the C-rate.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119915"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"V₂CTₓ MXene modified electrode for simultaneous detection of cadmium and lead ions","authors":"Xinzhu Wang ,&nbsp;Jingjing Zhao ,&nbsp;Jingyi Peng,&nbsp;Weiming Tian,&nbsp;Xiaojun Han","doi":"10.1016/j.jelechem.2026.119926","DOIUrl":"10.1016/j.jelechem.2026.119926","url":null,"abstract":"<div><div>The detection of toxic heavy metal ions (e.g., Cd²⁺, Pb²⁺) in water is essential for public health and environmental monitoring. Herein, we describe the fabrication of a V₂CTₓ MXene-based electrochemical sensor on a glassy carbon electrode (GCE) for the highly sensitive detection of Cd²⁺ and Pb²⁺ in water. V₂CT_x was synthesized by selective etching and characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) for its morphology and composition. The results revealed that the V₂CT_x possesses a typical two-dimensional layered structure with abundant surface functional groups, thus providing active sites for the adsorption and electron transfer of heavy metal ions. Using the optimized conditions (V₂CT_x concentration of 1 mg/mL, pH 4.0, deposition voltage of −1.3 V, deposition time of 6 min), the detection of Cd²⁺ and Pb²⁺ were performed by square wave anodic stripping voltammetry (SWASV). The limits of detection for Cd²⁺ and Pb²⁺ were 2.28 μg/L and 2.40 μg/L, respectively, which meet national drinking water standards. The V₂CTₓ/GCE showed good repeatability, reproducibility, anti-interference ability. The V₂CT_x/GCE holds great potential in the detection of heavy metal ions in real water samples.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119926"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel Ag/Co3O4 composite electrocatalyst: Synthesis and enhanced oxygen reduction reaction performance","authors":"Xiao-Yu Shen ,&nbsp;Han-Tao Zhang ,&nbsp;Yue-Han Li ,&nbsp;Rong-Hua Zhang ,&nbsp;Yan-Hui Qin ,&nbsp;Xin-Wen Zhou","doi":"10.1016/j.jelechem.2026.119919","DOIUrl":"10.1016/j.jelechem.2026.119919","url":null,"abstract":"<div><div>As a highly efficient and clean energy technology, fuel cells play a significant role in alleviating energy and environmental pressures. However, the high cost and inadequate stability of platinum-based catalysts constrain their widespread application. To address this, researchers are focusing on the development of low-cost, highly active non-precious metal catalysts. Among these, spinel-type Co₃O₄-based materials have emerged as a research focus due to their capacity to incorporate other metal elements and generate synergistic effects. This study synthesized an Ag/Co₃O₄ composite electrocatalyst using the rheological phase method. Structural characterization revealed that Ag exists in metallic form rather than being doped into Co sites, forming a heterostructure. This configuration not only increased the oxygen vacancy concentration of the Co₃O₄ support but also significantly enhanced the material's electrical conductivity, thereby synergistically improving oxygen reduction reaction activity. Compared with mechanically mixed Ag + Co₃O₄ samples, the Ag/Co₃O₄ composite catalyst prepared via the rheological phase method demonstrated superior electrochemical performance. At an Ag loading of 9% molar ratio, the catalyst exhibited a higher limiting current density (−3.91 mA/cm²), larger double-layer capacitance (0.158 mF/cm²), and a closer approach to the 4-electron transfer pathway in alkaline medium. The performance enhancement primarily originates from the well-defined heterointerface constructed through the rheological phase method, which optimizes electron transfer and reactant adsorption behavior. This study provides novel insights for designing high-performance non-precious metal catalysts and offers valuable references for the controllable synthesis and structural regulation of spinel-based composite materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119919"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemiluminescence for chiral analysis: Interfacial recognition, signal transduction, and circularly polarized readout","authors":"Yuhan Zhao,&nbsp;Xiaodan Gou,&nbsp;Zixuan Chen,&nbsp;Jun-Jie Zhu","doi":"10.1016/j.jelechem.2026.119910","DOIUrl":"10.1016/j.jelechem.2026.119910","url":null,"abstract":"<div><div>This review summarizes recent advances in chiral ECL for enantioselective analysis, highlighting key transduction mechanisms (enantioselective interfacial kinetics and emerging spin/quantum effects) and three design paradigms: externally introduced chiral interfaces, structurally encoded chiral frameworks and nanomaterials, and self-encoded intrinsically chiral luminophores. We discuss representative bioanalytical implementations in complex matrices and outline frontier directions that expand chiral ECL beyond intensity readout, including circularly polarized ECL (CP-ECL), potential-resolved multiplexing for information encoding, CISS-enabled spin regulation, and prospects for spatiotemporal chiral ECL imaging.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119910"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A facile synthesis of CaMoO4/MXene and its enhanced charge storage performance in an aqueous hybrid supercapacitor","authors":"Jai Bhagwan ,&nbsp;Sangyong Lee ,&nbsp;Jeong In Han","doi":"10.1016/j.jelechem.2026.119934","DOIUrl":"10.1016/j.jelechem.2026.119934","url":null,"abstract":"<div><div>In this work, CaMoO₄ is prepared by simplest hydrothermal method and comprehensive analysis is conducted on the investigation of crystallographic structure, functional groups, surface morphology and electronic states of the materials. The electrochemical analysis of CaMoO₄ nanoparticles is investigated in 2 M KOH and 2 M LiOH electrolytes. The high specific capacities of 126.96 mAh g⁻¹ and 94.11 mAh g⁻¹ are obtained at 1 A g⁻¹ in 2 M KOH and 2 M LiOH electrolytes, respectively. Further, the energy storage capacity of CaMoO₄ is enhanced by incorporating the optimum amount of MXene (Ti₃C₂), resulting in the capacity of CaMoO₄/MXene increasing to 161.49 mAh g⁻¹ in 2 M KOH electrolyte. For the practical applications, an aqueous hybrid supercapacitor (HSC) is assembled using CaMoO₄/MXene (positive electrode), activated carbon (AC) (negative electrode), cellulose paper (separator) and 2 M KOH (electrolyte). The assembled CaMoO₄/MXene//AC device delivers a high energy density of 43.40 W h kg⁻¹ at a power density of 800 W kg⁻¹. To demonstrate its practical applicability, two CaMoO₄/MXene//AC devices connected in series successfully powered four red light-emitting diodes (LEDs) connected in parallel. In addition, the devices effectively powered common electronic gadgets such as a kitchen timer, a digital humidity meter, and a toy motor fan.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1008 ","pages":"Article 119934"},"PeriodicalIF":4.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172757","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}