Journal of Electroanalytical Chemistry最新文献

{"title":"Formation of gradient SnOx films by wireless anodization","authors":"Aliaksandr Hrytskevich,&nbsp;Leszek Zaraska","doi":"10.1016/j.jelechem.2026.119930","DOIUrl":"10.1016/j.jelechem.2026.119930","url":null,"abstract":"<div><div>This study demonstrates, for the first time, the feasibility of using bipolar anodization to fabricate tin oxide (SnO_x) layers with controlled gradients in thickness and morphology. Sn foils were placed in 0.1 M NaOH between two Pt feeder electrodes, across which a potential difference of 20 V was applied for 30 min. SEM analysis revealed an exponential decrease in oxide layer thickness and a linear decrease in channel diameter with increasing distance from the sample edge, accompanied by a transition from cracked to crack-free regions. At the farthest zone, anodic dissolution of Sn occurred instead of oxide formation. These findings highlight bipolar anodization as a versatile approach for producing gradient SnO_x coatings, offering new opportunities for advanced applications in photoelectrochemical energy conversion, gas sensing, and catalysis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119930"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171849","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":"Single-Atom Catalysts for Urea Electrooxidation: Rational Design, Synthesis Strategies, and Mechanistic Insights","authors":"Mansor Hussain ,&nbsp;Abdur Rehman Nasrullah ,&nbsp;Muhammad Hasnain ,&nbsp;Amna Abrar ,&nbsp;Sundus Umer ,&nbsp;Muhammad Hanzla ,&nbsp;Hafiz Tanveer Ahmed ,&nbsp;Khadija Tabassum","doi":"10.1016/j.jelechem.2026.119922","DOIUrl":"10.1016/j.jelechem.2026.119922","url":null,"abstract":"<div><div>Single-Atom Catalysts (SACs) for Urea oxidation reaction (UOR) provide a promising platform for sustainable energy production and environmental remediation. By offering atomic-level precision, SACs maximize catalytic activity, selectivity, and stability, enabling UOR to occur at lower overpotentials compared to traditional catalysts. This review presents an in-depth analysis of SACs for UOR, emphasizing rational design, synthesis strategies, mechanistic insights, and advanced characterization. We discuss various synthesis methods, the pivotal role of support materials, and the application of in situ/operando techniques and artificial intelligence in catalyst discovery. The ultimate goal is to provide a comprehensive resource for developing efficient, stable, and scalable SACs for real-world deployment in hydrogen production and wastewater treatment.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1007 ","pages":"Article 119922"},"PeriodicalIF":4.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172196","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 ternary TiO2/SiOx/C composite with different crystalline phases of TiO2 as an anode material for high performance lithium-ion batteries","authors":"Xiangwu Zhao,&nbsp;Minglu Liu,&nbsp;Hao He,&nbsp;Fangfang Wang,&nbsp;Shengwen Zhong","doi":"10.1016/j.jelechem.2026.119831","DOIUrl":"10.1016/j.jelechem.2026.119831","url":null,"abstract":"<div><div>The commercialization of silicon monoxide (SiOₓ) anodes has been hindered by their poor cycling stability resulting from significant volume expansion during cycling. Composite doping represents a common strategy to address this issue. In this study, a ternary core–shell architecture was constructed via a one-step approach, and for the first time, the feasibility of co-incorporating both anatase and rutile TiO₂ phases into a SiOₓ/C core–shell framework was demonstrated. Furthermore, the distinct mechanisms by which each crystal phase enhances the electrochemical performance of the composite were systematically elucidated: the anatase phase primarily establishes a stable Li⁺ conduction network, thereby improving long-term cycling stability, while the rutile phase significantly enhances Li⁺ diffusion kinetics through its unique crystalline channels, leading to superior rate capability. The TiO₂–SiOₓ/C composite prepared with anatase TiO₂ exhibited an initial discharge capacity of 1830.32 mAh g⁻¹ and retained 997.10 mAh g⁻¹ after 300 cycles, corresponding to a capacity retention of 53.96%. In contrast, the composite incorporating rutile TiO₂ delivered specific capacities of 1066.11, 991.92, 890.98, and 679.23 mAh g⁻¹ at current densities of 0.3, 0.5, 1.0, and 3.0 A g⁻¹, respectively.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119831"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048998","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":"Electrochemical synthesis of carbon dots in aqueous media: a critical review","authors":"Andreia D. Veloso,&nbsp;Maria C. Oliveira","doi":"10.1016/j.jelechem.2026.119847","DOIUrl":"10.1016/j.jelechem.2026.119847","url":null,"abstract":"<div><div>The electrochemical synthesis of carbon dots (CDs) in aqueous media has gained considerable prominence in the development of quasi-zero-dimensional nanomaterials, due to its alignment with green chemistry principles and its ability to offer precise control over synthesis conditions.</div><div>This work presents a critical and comprehensive analysis of strategies for the electrochemical synthesis of CDs. Emphasis is placed on the effect of electrode polarization mode, whether potentiostatic, galvanostatic, or potentiodynamic. Within each mode, the review systematically examines key experimental parameters, including electrolyte composition, carbon source, applied potential or current, synthesis duration, and cell configuration, and analyses how each influences the physicochemical properties of the resulting nanomaterials</div><div>The long-standing dichotomy between top-down and bottom-up strategies is revisited in the context of systems where organic electrolytes and carbon-based electrodes can simultaneously act as carbon sources. The emergence of hybrid synthesis strategies provides unprecedented control over the core structure and surface chemistry of CDs, enhancing their optical and catalytic tunability.</div><div>By analyzing literature from 2008 to 2025, this review highlights key developments, identifies persistent challenges, and outlines future research directions, thereby contributing to the rational design of the electrochemical synthesis strategies for carbon dots.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119847"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185970","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":"Uniform ZIF-8 dispersion in polyimide nanofibers enabling dual-ion sieving and dendrite suppression for high-energy-density zinc-ion batteries","authors":"Xiaoran Li ,&nbsp;Liying Wang ,&nbsp;Jinzheng Liu ,&nbsp;Yabin Wang ,&nbsp;Minghui Zhang ,&nbsp;Yu Yan ,&nbsp;Tieshi He","doi":"10.1016/j.jelechem.2025.119693","DOIUrl":"10.1016/j.jelechem.2025.119693","url":null,"abstract":"<div><div>Polyimide (PI)/Zeolitic imidazolate framework-8 (ZIF-8) composite nanofibers were successfully fabricated <em>via</em> electrospinning process. The influence of varying ZIF-8 contents on the morphology and property of PI/ZIF-8 electrospun fibers were investigated by scanning electron microscope, Fourier transform infrared and X-ray powder diffractometer. ZIF-8 nanoparticles can be uniformly distributed within PI electrospun fibers matrix under optimized electrospinning conditions. The electrolyte wettability, uptake capacity and electrochemical stability of PI/ZIF-8 electrospun fibers were systematically examined. PI/ZIF-8 electrospun fiber separator can provide good affinity and wide electrochemical stability window. The relationship between electrochemical performance and structure of PI/ZIF-8 electrospun fibers served as separator for aqueous zinc ion batteries was studied by alternating current impedance, cyclic voltammetry and constant current charge-discharge tests. The incorporation of ZIF-8 significantly enhanced the electrochemical performance of electrospun fiber separator. PI/ZIF-8 electrospun fiber separator derived from PI: ZIF-8 mass ratio = 100: 15 shows excellent comprehensive electrochemical performance: high energy density (4.01 Wh kg⁻¹) at high power density (18.27 W kg⁻¹), the capacity retention rate is 68.8 % after 1000 charge-discharge at 2C. Therefore, the present study provides a promising strategy for developing PI based nanofibers served as separator of electrochemical energy storage devices.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119693"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076389","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":"Tailoring BiVO₄/CdS dip-coated Z-scheme heterojunction thin films for enhanced visible-light-driven photodegradation of methylene blue: deposition optimization, kinetics, and mechanistic insights","authors":"Roni Adi Wijaya ,&nbsp;Gunawan Gunawan ,&nbsp;Ahmad Suseno ,&nbsp;Nor Basid Adiwibawa Prasetya ,&nbsp;Fitria 'Izzatun Nisa ,&nbsp;Wilman Septina ,&nbsp;Takashi Harada","doi":"10.1016/j.jelechem.2026.119876","DOIUrl":"10.1016/j.jelechem.2026.119876","url":null,"abstract":"<div><div>The increasing release of persistent organic dyes, such as methylene blue (MB), from industrial effluents poses a serious environmental concern due to their high toxicity and resistance to conventional treatment methods. This study investigates the optimization of dip-coated BiVO₄ thin films and their modification with CdS to construct a BiVO₄/CdS <em>Z</em>-scheme heterojunction for enhanced visible-light-driven photodegradation of MB. BiVO₄ films were synthesized on FTO substrates via dip-coating with varied deposition durations and subsequently coated with CdS nanoparticles. Structural and morphological analyses confirmed the formation of crystalline monoclinic BiVO₄ with uniform CdS coverage and strong interfacial coupling. The optimized BiVO₄(20 min)/CdS thin film achieved a 94.7% MB degradation within 120 min under visible-light illumination, following pseudo-first-order kinetics with a rate constant of 0.0249 min⁻¹. Photoelectrochemical characterization revealed a significant increase in photocurrent from 0.2 mA·cm⁻² for bare BiVO₄ to 1.3 mA·cm⁻² for BiVO₄/CdS, confirming improved charge separation and interfacial charge-transfer efficiency. The <em>Z</em>-scheme mechanism enables photogenerated electrons in the CdS conduction band to recombine with holes in the BiVO₄ valence band, thereby preserving strong redox potentials for the formation of reactive oxygen species (ROS). These ROS drive oxidative pathways, including <em>N</em>-demethylation, hydroxylation, and aromatic ring cleavage, leading to complete MB mineralization. The BiVO₄/CdS thin film also exhibits excellent stability and reusability over four successive cycles with minimal efficiency loss. This work demonstrates a facile strategy for designing high-performance photoanodes for solar-driven wastewater treatment and sustainable environmental remediation.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119876"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076387","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":"Engineering valence state of Co3O4 on carbon cloth for efficient nonenzymatic glucose detection","authors":"Qing Yang ,&nbsp;Jingsen Zhang ,&nbsp;Mingyi Lv ,&nbsp;Chuanjie Chen ,&nbsp;Yue Hua ,&nbsp;Hong Li ,&nbsp;Lanbo Di","doi":"10.1016/j.jelechem.2026.119897","DOIUrl":"10.1016/j.jelechem.2026.119897","url":null,"abstract":"<div><div>Regulating the cobalt valence state is a crucial strategy for enhancing nonenzymatic glucose detection. In this study, two self-supported Co₃O₄ nanocomposites were fabricated on plasma-pretreated carbon cloth (CC^P) by electrodepositing an α-Co(OH)₂ precursor followed by either plasma treatment yielding Co₃O₄/CC^P-P or calcination yielding Co₃O₄/CC^P-C. Structural characterization reveals that plasma pretreatment enriches the CC^P surface with abundant oxygen-containing functional groups (OCGs), significantly improving its hydrophilicity. In addition, the Co₃O₄/CC^P-C exhibits a phase-pure structure enriched with multiple Co³⁺ and surface-adsorbed oxygen (O_Ads). These properties coupled with its rapid electron-transfer capability significantly promote the glucose oxidation reaction. Compared with Co₃O₄/CC^P-P, the Co₃O₄/CC^P-C electrode presents markedly higher electrocatalytic activity toward glucose oxidation, featuring superior sensitivities of 6380 μA·mM⁻¹·cm⁻² (0.05–0.4 mM) and 2070 μA·mM⁻¹·cm⁻² (0.4–1.4 mM), along with a lower limit of detection (2.9 μM). The Co₃O₄/CC^P-C electrode also exhibits excellent selectivity, good preparation repeatability (relative standard deviation (RSD) = 2.14%), operational repeatability (RSD = 1.36%) and favorable stability (RSD = 2.40%). This study provides a promising approach for developing efficient non-enzymatic glucose oxidation Co-based electrocatalysts, and gets insights into the influence mechanism by engineering the Co valence state.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119897"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185380","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":"Electrochemical dissolution behavior of two near-α titanium alloys TA12A and TA15 in NaCl solution","authors":"Xiutao Tang,&nbsp;Zengwei Zhu","doi":"10.1016/j.jelechem.2026.119886","DOIUrl":"10.1016/j.jelechem.2026.119886","url":null,"abstract":"<div><div>Electrochemical machining is a beneficial technique for near-α Ti alloys because it induces no processing stress and provides high material removal efficiency. TA12A is a recently developed titanium alloy belonging to the same category of near-α titanium alloys as TA15. This study investigates the anodic dissolution behavior of TA12A and TA15 in a NaCl solution and analyzes the underlying phenomena. Comparative assessments of polarization curves and material removal rates show that both alloys exhibit similar polarization characteristics, although TA12A exhibits a higher transpassivation potential and a greater material removal rate at high current densities. The dissolution behavior was examined under different current densities and dissolution times. Owing to the presence of Mo, Zr, and other corrosion-resistant elements, the β phase in both alloys shows higher corrosion resistance than the α phase, resulting in preferential dissolution of the α phase. The β phase of TA12A additionally contains corrosion-resistant elements such as Nb, Sn, and Ta, giving it superior resistance compared with the β phase of TA15. In TA12A, there is a larger contrast in corrosion resistance between the α and β phases, which results in a more pronounced difference in phase height after dissolution. Consequently, TA12A exhibits inferior surface quality compared with TA15 under identical conditions. Dissolution models were developed to elucidate the electrochemical dissolution characteristics of TA12A and TA15 in the NaCl solution.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119886"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185969","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":"Research progress on doping modification of lithium-ion cathode materials: high-nickel LiNi1−x−yCoxMnyO₂, LiNi1−x−y CoxAlyO₂ and LiFePO₄","authors":"Jiaxuan Hu ,&nbsp;Jinhao Zheng ,&nbsp;Yuanjing Li ,&nbsp;Yang Shao ,&nbsp;Xiangguang Bi ,&nbsp;Zhengfu Zhang ,&nbsp;Shaohua Ju ,&nbsp;Xian Zhou","doi":"10.1016/j.jelechem.2026.119898","DOIUrl":"10.1016/j.jelechem.2026.119898","url":null,"abstract":"<div><div>In response to the urgent need for high-performance lithium-ion batteries in the global energy transition, this paper focuses on two mainstream cathode materials: high-energy-density nickel-rich ternary materials ((LiNi_1-x-yCo_xMn_yO₂, LiNi_1-x-yCo_xAl_yO₂)) and high-safety lithium iron phosphate (LiFePO₄). The research progress on element doping strategies for regulating the intrinsic properties and improving the electrochemical performance of these materials is systematically reviewed. The article first analyzes the key challenges faced by the two materials: nickel-rich materials are prone to structural degradation and interfacial side reactions, while lithium iron phosphate is limited by its low ionic and electronic conductivity. On this basis, the mechanisms of cation doping, anion doping, and multi-element co-doping strategies in stabilizing the crystal framework, inhibiting phase transition, broadening lithium-ion migration channels, and strengthening interface stability are emphatically expounded. By systematically summarizing the optimization effects of different doping elements on material capacity, rate performance, and cycle stability, this paper further looks forward to future development directions, including the single-crystal design of nickel-rich materials, low-cobalt/cobalt-free design, the construction of an efficient conductive network for lithium iron phosphate, and the new role of doping technology in promoting its adaptation to solid-state battery systems. The aim is to provide a theoretical reference and technical pathway for the rational design of next-generation high-performance and high-stability lithium-ion battery cathode materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119898"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185382","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 highly sensitive electrochemical sensor for capsaicin detection based on carbon-cloth electrodes modified with SRGO/CNT-COOH/β-CD","authors":"Huirou Zhou ,&nbsp;Shasha He ,&nbsp;Xinglin Qin ,&nbsp;Rahim Rahimi ,&nbsp;Pengzhan Liu ,&nbsp;Hongjie Jiang","doi":"10.1016/j.jelechem.2026.119889","DOIUrl":"10.1016/j.jelechem.2026.119889","url":null,"abstract":"<div><div>Capsaicin is the primary bioactive compound responsible for the pungent sensation in spicy foods, and its content directly determines the intensity of spiciness. However, current evaluations of spiciness largely rely on subjective sensory assessments, lacking objective and quantitative methods. Therefore, the development of a rapid-response sensor capable of accurately detecting capsaicin is of great significance. In this study, a composite material based on sulfonated reduced graphene oxide (SRGO) and carboxylated multi-walled carbon nanotubes (CNT-COOH), dispersed with β-cyclodextrin (β-CD), was successfully fabricated and employed to modify a carbon cloth (CC) electrode, resulting in a flexible electrochemical sensor for capsaicin detection. In detail, SRGO could provide high electrical conductivity, and CNT-COOH offer a large specific surface area and abundant active sites. Benefiting from these advantages, this electrode exhibits outstanding electrocatalytic performance toward capsaicin in buffer solution, including a wide linear range (1–340 μM), a low detection limit (1.67 μM), high response current (at the milliampere level), excellent selectivity and strong anti-interference capability. Overall, this work provides a robust electrochemical platform for capsaicin quantification. This sensing strategy also provides a valuable basis for the future development of portable and low-cost capsaicin detection devices, offering substantial potential for rapid, on-site, and objective assessment of spiciness in practical applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"1006 ","pages":"Article 119889"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185383","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}