International Journal of Electrochemical Science最新文献

{"title":"Ni-decorated porous dendritic Cu film on Cu foam for enhanced hydrazine oxidation catalysis","authors":"Ran Liu ,&nbsp;Yuting Luan ,&nbsp;Shuang Sheng ,&nbsp;Jinling Yin","doi":"10.1016/j.ijoes.2025.101142","DOIUrl":"10.1016/j.ijoes.2025.101142","url":null,"abstract":"<div><div>Two major challenges limit the widespread use of direct hydrazine fuel cells (DHFCs): slow hydrazine oxidation reaction (HzOR) kinetics and the reliance on expensive noble-metal catalysts. To overcome these limitations, a Ni-Cu film/Cu foam (CF) electrode was developed through a two-stage electrochemical deposition approach. This process involved initially depositing a three-dimensional (3D) porous dendritic Cu film onto a CF substrate (denoted as Cu film/CF), followed by the controlled electrodeposition of Ni nanoparticles onto the prepared Cu film. The well-designed Ni-Cu film/CF electrode demonstrated noticeable superiority in terms of catalytic activity over single-metal electrodes and commercial Pt/C catalyst, displaying a current density (<em>j</em>) of 295.1 mA cm⁻² at −0.65 V and an onset potential (<em>E</em>_on) of −1.1 V. Electrochemical kinetic parameters were determined, revealing that the Ni-Cu film/CF electrode exhibited a reduced activation energy (<em>E</em>_a), diminished charge-transfer resistance (<em>R</em>_ct), and an increased electrochemically active surface area (ECSA) compared to its monometallic electrodes. The electrocatalytic performance enhancement stems from the unique 3D porous dendritic shape of the Ni-Cu film/CF electrode in conjunction with synergistic Ni-Cu effect, which promotes electron transport, facilitates accessibility to catalytic sites, and optimizes HzOR kinetics.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101142"},"PeriodicalIF":2.4,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Front Matter1:Full Title Page","authors":"","doi":"10.1016/S1452-3981(25)00211-1","DOIUrl":"10.1016/S1452-3981(25)00211-1","url":null,"abstract":"","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 9","pages":"Article 101136"},"PeriodicalIF":1.3,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Black tea extract as a corrosion inhibitor for X70 steel in chloride media: Experimental and theoretical investigation","authors":"Reza Hatami,&nbsp;Mohamadamin Amarzadeh,&nbsp;Hadi Eskandri,&nbsp;Iman Danaee","doi":"10.1016/j.ijoes.2025.101140","DOIUrl":"10.1016/j.ijoes.2025.101140","url":null,"abstract":"<div><div>The increased emphasis on sustainability and environmental concerns in metal corrosion is paramount, often achieved through the use of inhibitors, especially by utilizing plant extracts, which is a promising approach due to their availability and ease of extraction. Herein, for the first time, the effectiveness of the black tea inhibitor as a sustainable potent corrosion inhibitor for X70 steel under 3.5 wt% NaCl and 1 M HCl aggressive test solutions is explored, from both experimental and theoretical insights. The corrosion morphology was investigated using atomic force microscopy (AFM), which confirmed the presence of a protective adsorbed layer on the X70 steel surface. By aiding polarization examinations, electrochemical impedance spectroscopy (EIS), and electrochemical current noise analyses, the anti-corrosion capability and the mechanism of the proposed inhibitor were evaluated. The polarization analysis results revealed that in the presence of 200 ppm black tea extract inhibitor, the rates of both cathodic and anodic reactions were significantly decreased, resulting in a reduction in corrosion rate from 0.01 to 0.003 mg/s in NaCl solution and from 0.22 to 0.02 mg/s in HCl medium. Regarding the EIS findings, the most significant inhibition efficiency, approximately 66 %, was achieved after introducing just 200 ppm of black tea extract under the explored corrosive media. Additionally, the density functional theory (DFT) was employed to investigate the electronic properties of the molecules responsible for the inhibitory performance of the as-made black tea inhibitor. Furthermore, a Monte Carlo (MC) simulation and the molecular electrostatic potential (MESP) surface were employed to further comprehend the adsorption mechanism of these molecules on Fe(110) surfaces. The acquired outcomes manifested that the black tea extract possesses significant corrosion inhibition potential for the X70 steel plates.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101140"},"PeriodicalIF":2.4,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrooxidation of ethanol on silver-reduced graphene oxide (Ag/rGO) surface – Effect of alloying with palladium","authors":"Vhahangwele Mudzunga ,&nbsp;Olayemi J. Fakayode ,&nbsp;Bakang M. Mothudi ,&nbsp;Touhami Mokrani ,&nbsp;Nobanathi Wendy Maxakato ,&nbsp;Rudzani Sigwadi","doi":"10.1016/j.ijoes.2025.101141","DOIUrl":"10.1016/j.ijoes.2025.101141","url":null,"abstract":"<div><div>The study examined the impact of alloying palladium (Pd) with silver-reduced graphene oxide (AgrGO) nanocomposites on ethanol electrooxidation. The electrocatalysts were synthesised using wet chemical method and characterized using conventional spectroscopic and microscopic techniques. The Pd₁Ag₁rGO composite demonstrated superior performance compared to Pd₂Ag₁rGO and AgrGO, attributed to its relatively smaller particle size of 5.3 nm, which enhances catalytic activity, a higher density of defects for better electron transfer, and improved electrochemical properties. It achieved an impressive exchange current density of 1.70 µA cm⁻², indicating rapid reaction kinetics, alongside lower charge transfer resistance. This research highlights the potential of Pd₁/Ag₁-rGO nanocomposites as an alternative to platinum electrocatalyst for efficient ethanol oxidation, supporting advancements in sustainable fuel cell technologies.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101141"},"PeriodicalIF":2.4,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in single-atom catalysts for high-performance carbon dioxide electroreduction: Synthetic strategies and electrochemical frontiers","authors":"Hai Wang ,&nbsp;Linwei Yan","doi":"10.1016/j.ijoes.2025.101131","DOIUrl":"10.1016/j.ijoes.2025.101131","url":null,"abstract":"<div><div>The electrochemical carbon dioxide reduction reaction (CO₂RR) represents a cornerstone technology for mitigating greenhouse gas emissions while simultaneously producing value-added chemicals and fuels from a renewable carbon source. The development of this technology hinges on the design of highly active, selective, and stable electrocatalysts. Single-atom catalysts (SACs), which feature atomically dispersed metal centers anchored on a support material, have emerged as a frontier in catalysis science, offering unprecedented opportunities for CO₂RR. By maximizing atom-utilization efficiency and providing a unique, tunable coordination environment, SACs bridge the gap between homogeneous and heterogeneous catalysis, enabling both high performance and fundamental mechanistic understanding. This review provides a comprehensive and critical analysis of recent breakthroughs in the field of SACs for CO₂RR. We first delve into advanced synthetic strategies, including wet-chemistry methods, high-temperature pyrolysis, and atomic layer deposition, with a focus on the principles governing the formation and stabilization of isolated atomic sites. Subsequently, we survey the electrochemical frontiers, systematically evaluating the performance of state-of-the-art SACs for the selective production of key products such as carbon monoxide (CO), formate (HCOOH), and multicarbon (C2 +) compounds. A central theme of this review is the elucidation of structure-performance relationships, where we connect synthetic control over the catalyst's atomic and electronic structure with its resulting electrochemical behavior, highlighting insights gained from a powerful combination of operando spectroscopic techniques and density functional theory (DFT) calculations. Finally, we address the overarching challenges that currently impede the practical application of SACs—notably issues of stability, scalability, and performance in industrial-relevant devices—and offer a forward-looking perspective on the future research directions poised to overcome these hurdles, including the design of multi-atom active sites and the integration of artificial intelligence in catalyst discovery.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101131"},"PeriodicalIF":2.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical and surface characterization of the corrosion of 6061 aluminum alloy and its composite with SiC in hydrochloric acid solutions","authors":"Namitha Kedimar ,&nbsp;Padmalatha Rao ,&nbsp;Suma A. Rao","doi":"10.1016/j.ijoes.2025.101133","DOIUrl":"10.1016/j.ijoes.2025.101133","url":null,"abstract":"<div><div>This article investigates the corrosion rates of 6061 aluminum alloy and 6061 Al-10(vol%) SiC_(p) composite (6061 Al-CM) by electrochemical techniques like potentiodynamic polarization and electrochemical impedance for five different HCl concentrations (0.01 M, 0.025 M, 0.05 M, 0.1 M, 0.25 M) and at five different temperatures (303 K, 308 K, 313 K, 318 K, 323 K). Kinetic parameters were determined using Arrhenius rate and transition state equations. The surface morphology was studied using a scanning electron microscope. Elemental mapping was done using energy-dispersive X-ray analysis, and the surface roughness was obtained from an atomic force microscope. The results showed that the corrosion rate was greater for 6061 Al-CM compared to aluminum alloy 6061 at all studied acid concentrations and at all temperatures. Surface morphology studies confirmed the active dissolution of composite and 6061 aluminum alloy in the presence of acid.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101133"},"PeriodicalIF":1.3,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of flow velocity on electrochemical corrosion resistance of carbon steel and 316 L stainless steels in 3.5 % sodium chloride solution","authors":"Guofu Ou ,&nbsp;Xudong Liu ,&nbsp;Xin Huang ,&nbsp;Wangping Wu","doi":"10.1016/j.ijoes.2025.101130","DOIUrl":"10.1016/j.ijoes.2025.101130","url":null,"abstract":"<div><div>A newly designed rotating corrosion experimental setup was constructed to study the electrochemical corrosion resistance of 20# carbon steel and 316 L stainless steels in 3.5 % NaCl corrosive solution combining electrochemical measurements and surface analysis techniques. The effect of flow velocity on the electrochemical corrosion resistance of steel substrates in corrosive solution was investigated using a combination of electrochemical testing and computational fluid dynamics (CFD) simulation. The electrochemical corrosion tests, including open circuit potential, electrochemical impedance spectroscopy, and polarization measurements, were conducted to assess the corrosion behavior of the materials under different flow velocities. The results revealed that the corrosion products on 20# carbon steel formed a loose and porous structure, whereas the surface of 316 L stainless steel remained smooth, exhibiting significantly good corrosion resistance. Moreover, the corrosion rates of 20# carbon steel and 316 L stainless steel exhibit a nonlinear dependence on flow velocity, with a distinct critical flow velocity identified. Specifically, the critical flow velocities for 20# carbon steel and 316 L stainless steel were 2 m/s and 1.5–2 m/s. Prior to reaching the critical flow velocity, the overall corrosion rate decreased as flow velocity increased. However, beyond this threshold, the corrosion rate increased due to the localized breakdown of the protective corrosion product film. In addition, CFD simulations were conducted to investigate the hydrodynamic factors, and the results showed that the magnitude of fluid-induced shear stress did not exhibit a clear positive correlation with the corrosion rate.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101130"},"PeriodicalIF":1.3,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comprehensive review of electrochemical lactate biosensors: Principles, innovations, and future perspectives","authors":"Haomiao Yang ,&nbsp;Shuangshuang Yan","doi":"10.1016/j.ijoes.2025.101132","DOIUrl":"10.1016/j.ijoes.2025.101132","url":null,"abstract":"<div><div>Lactate, a pivotal metabolite in cellular energetics, has garnered significant attention as a biomarker for assessing physiological status in sports science and clinical diagnostics. The limitations of traditional invasive lactate measurement methods have spurred the development of electrochemical biosensors, offering pathways for real-time, non-invasive, and continuous monitoring. This review provides a comprehensive overview of the progress in electrochemical lactate biosensors, with a particular focus on their application in enhancing sports science and performance monitoring. Fundamental principles, including amperometric, voltammetric, and potentiometric detection, alongside the roles of lactate oxidase and lactate dehydrogenase, are discussed. Recent advancements highlight the transformative impact of nanomaterials such as graphene, carbon nanotubes, metal/metal oxide nanoparticles, and MXenes in improving sensor sensitivity, stability, and selectivity. Innovations in fabrication techniques, including screen printing, 3D printing, and microfluidics, are paving the way for sophisticated wearable devices targeting sweat, saliva, and interstitial fluid. The application of these biosensors in sports for determining lactate thresholds, monitoring exercise intensity, managing fatigue, and optimizing training is critically examined. Despite significant strides, challenges related to analytical performance, biofluid correlation with blood, sensor-body interface, and data interpretation persist. Future directions point towards multiplexed sensing, integration with the Internet of Things (IoT), and the application of artificial intelligence and machine learning for advanced data analytics, heralding an era of personalized and data-driven athletic training and healthcare.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101132"},"PeriodicalIF":1.3,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous Electrochemical Impedance Spectroscopy and Magnetic Resonance Imaging analysis of lithium-ion batteries","authors":"Andreas Markert ,&nbsp;Max Morales ,&nbsp;Christoph Guntlin ,&nbsp;Hermann Nirschl ,&nbsp;Gisela Guthausen","doi":"10.1016/j.ijoes.2025.101129","DOIUrl":"10.1016/j.ijoes.2025.101129","url":null,"abstract":"<div><div>Electrochemical Impedance Spectroscopy and Magnetic Resonance Imaging (MRI) were measured simultaneously on Lithium-Ion batteries. The motivation for developing this measurement method was the following: While Electrochemical Impedance Spectroscopy provides integral information on processes in the battery, MRI adds spatially resolved information on structures and their changes in the battery on a microscopic length scale. This offers combined and more comprehensive information on microscopic and integral levels. A significant benefit of simultaneous measurement is that the battery is in the same state as well as that it allows continuous measurement of a specific battery thus avoiding replacements and rest times when exchanging parts of the experiments. Comparative measurements of Electrochemical Impedance Spectroscopy, performed in parallel to MRI and outside of the MRI setup, however, require optimal decoupling of the electromagnetic fields involved in both techniques. The current version shows only minor differences in the impedances measured below 20 Hz. On the other hand, images were acquired with and without parallel Electrochemical Impedance Spectroscopy, the images show the same structural features. Differences are on the noise level of the MRI measurement. The combination of results of both techniques allows for a thorough detection and identification of the batteries behavior. For example, in the case of two fresh batteries, increased resistance could be assigned to inhibited ionic transport paths due to a misplaced separator. In aged and defective batteries, the combination of both techniques revealed the loss of electrolyte to be the main source of degradation.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101129"},"PeriodicalIF":1.3,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a porous 304L Stainless steel substrate enhanced with graphene and platinum for hydrogen mitigation in passive autocatalytic recombiners","authors":"L. De Micheli,&nbsp;G. Silvestrin,&nbsp;R.F.B. de Souza,&nbsp;A. Oliveira Neto,&nbsp;C. Giovedi","doi":"10.1016/j.ijoes.2025.101128","DOIUrl":"10.1016/j.ijoes.2025.101128","url":null,"abstract":"<div><div>The rapid expansion of the hydrogen economy poses significant safety challenges related to hydrogen handling across a wide range of applications. This study investigates the feasibility of using porous sintered 304 L stainless steel, coated with graphene and doped with platinum, as an advanced material for passive autocatalytic recombiners (PARs) to mitigate hydrogen release and improve operational safety. Detailed characterization using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy confirmed the uniform deposition of graphene and platinum layers, as well as structural features such as spinel phase segregation. The low surface wettability, attributed to the armchair configuration of graphene edges, further enhances the material’s suitability for catalytic recombination reactions in humid environments. Hydrogen removal tests demonstrated that an optimized platinum doping level of 0.5 wt% combined with a controlled substrate porosity of 50 µm resulted in a maximum hydrogen conversion efficiency of 40 %. These results highlight the critical influence of doping concentration and pore architecture on catalytic performance and overall PAR efficiency. Overall, this research provides valuable insights into the development of high-performance, passive hydrogen recombination systems, offering a promising pathway to improve safety and sustainability in emerging hydrogen technologies and to advance the hydrogen industry.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 10","pages":"Article 101128"},"PeriodicalIF":1.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}