Susana Campuzano , Maria Gamella , José M. Pingarrón
{"title":"Magnetic support-driven electrochemical affinity biosensing: Advancing sensitive, rapid, and simplified determination of clinically relevant analytes","authors":"Susana Campuzano , Maria Gamella , José M. Pingarrón","doi":"10.1016/j.coelec.2025.101729","DOIUrl":"10.1016/j.coelec.2025.101729","url":null,"abstract":"<div><div>The demand to determine analytes at increasingly lower concentrations in complex samples, while minimizing sample size, treatment and test duration, has driven innovation in electrochemical biotechnologies. Inspired by the principle that affinity reactions gain in efficiency and speed when the biosensing surface seeks the analyte, bioelectrochemical technologies leverage their unique strengths along with those provided by magnetic carriers to improve affinity testing, pushing the boundaries of accuracy and efficiency.</div><div>This minireview focuses primarily on magnetic beads, motors, and gold-coated magnetic nanoparticles dispersible electrodes, considering the remarkable improvements they provide in electrochemical affinity biotechnologies. A timely, comparative, and critical analysis of the opportunities offered by these three magnetic supports in electrochemical affinity biodetection is carried out by highlighting and discussing some of the most innovative research. This minireview also dares to forecast the future potential of these technologies for advancing modern analytical capabilities and accelerating their integration into next-generation point-of-care devices.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101729"},"PeriodicalIF":7.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Progress and pitfalls in measuring the double-layer capacitance of platinum electrodes","authors":"Nicci L. Fröhlich, Marc T.M. Koper","doi":"10.1016/j.coelec.2025.101727","DOIUrl":"10.1016/j.coelec.2025.101727","url":null,"abstract":"<div><div>Despite extensive research, the double-layer structure at Pt/aqueous electrolyte interfaces (quantified by the double-layer capacitance, <em>C</em><sub>dl</sub>) remains incompletely understood as even for the model Pt(111)/HClO<sub>4</sub> interface, anomalous <em>C</em><sub>dl</sub> trends have been reported. These trends were previously ascribed to differences in measurement techniques (<em>i.e.</em> dc methods such as cyclic voltammetry versus ac methods such as electrochemical impedance spectroscopy [EIS]). However, by repeating these measurements using EIS, we clarify that these anomalous <em>C</em><sub>dl</sub> trends are not measurement artefacts but instead reflect intrinsic properties of the Pt(111)/HClO<sub>4</sub> interface, necessitating continued investigation. We further highlight the complexity introduced by electrosorbed H<sub>ads</sub> and/or OH<sub>ads</sub> species resulting from catalytic H<sub>2</sub>O dissociation, which contribute an adsorption (pseudo)capacitance, <em>C</em><sub>ads</sub>. This complicates the deconvolution of <em>C</em><sub>dl</sub> from total capacitance, a challenge further exacerbated by structure-dependent adsorption between different Pt facets. Our goal is to clarify how these factors affect capacitance interpretation at Pt/aqueous electrolyte interfaces, particularly highlighting the progress and challenges in accurately extracting <em>C</em><sub>dl</sub> values from prior studies.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101727"},"PeriodicalIF":7.9,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nishi Gondhiya, Abd Ur Rehman, Daniel Andreescu, Silvana Andreescu
{"title":"Portable electrochemical sensors for per- and polyfluoroalkyl substances: Design, challenges, and opportunities for field deployment","authors":"Nishi Gondhiya, Abd Ur Rehman, Daniel Andreescu, Silvana Andreescu","doi":"10.1016/j.coelec.2025.101725","DOIUrl":"10.1016/j.coelec.2025.101725","url":null,"abstract":"<div><div>The widespread presence of per- and polyfluoroalkyl substances (PFAS) in the environment presents a complex global challenge due to their persistence, resistance to degradation, and harmful effects. Electrochemical sensors offer the sensitivity needed to detect PFAS at regulatory limits and show promise for large-scale environmental monitoring without the need for costly laboratory equipment. This review highlights recent advances in electrochemical sensing technologies and their potential as field-deployable devices for rapid screening and on site PFAS detection. Examples include sensor platforms based on redox-active reporters, molecularly imprinted polymers (MIPs), redox dyes, metal organic frameworks (MOFs), covalent organic frameworks (COFs), nanoparticle impacts, and nanobubble and nanopore technologies, coupled with direct or indirect signal transduction strategies. We discuss promising sensor designs and detection mechanisms and outline the key challenges and future directions needed to advance their practical deployment in environmental monitoring applications.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101725"},"PeriodicalIF":7.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The role of interfacial water in promoting C–C coupling during CO2 electroreduction","authors":"Anthony Shoji Hall , David Raciti","doi":"10.1016/j.coelec.2025.101722","DOIUrl":"10.1016/j.coelec.2025.101722","url":null,"abstract":"<div><div>The electrochemical reduction of CO<sub>2</sub> (CO<sub>2</sub>RR) into hydrocarbons and oxygenates presents a promising pathway toward a carbon-neutral energy cycle, but achieving selective product formation remains a challenge. While extensive efforts have focused on catalyst design and electrolyte composition, the role of the interfacial water properties, an often-overlooked parameter, has only recently come under investigation. Water serves as the primary proton donor (in aqueous electrolytes) in the absence of hydronium, which can influence the competition between CO<sub>2</sub>RR and the hydrogen evolution reaction (HER). Despite studies dating back to the 1980s demonstrating that electrolyte composition significantly impacts CO<sub>2</sub>RR performance, the effects of the electrolyte composition on the interfacial water properties have remained largely unexplored. Recent findings suggest that tuning the interfacial water properties can influence C–C coupling by altering solvation environments and stabilize reaction intermediates. This perspective explores how tuning the interfacial water properties improves C–C coupling, providing a new strategy for improving catalysis.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"52 ","pages":"Article 101722"},"PeriodicalIF":7.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seiti Inoue Venturini, Manuel J.S. Farias, Germano Tremiliosi-Filho
{"title":"Feasibility of the hydrogen production by assistance of ethanol: A critical perspective","authors":"Seiti Inoue Venturini, Manuel J.S. Farias, Germano Tremiliosi-Filho","doi":"10.1016/j.coelec.2025.101723","DOIUrl":"10.1016/j.coelec.2025.101723","url":null,"abstract":"<div><div>Traditional electrolytic water splitting is one of the usual ways to produce molecular hydrogen. However, the specific slow kinetics of the complementary anodic molecular oxygen generation harm the efficiency of hydrogen evolution. One of the ways to get around this problem is to replace the slow oxygen reaction by another anodic reaction, with higher faradaic efficiency, such as those involving biomass derivatives, especially the ethanol, setting up the electrochemical ethanol reformer. Thus, in this work is made a critical review of recent researchers regarding the development of catalytic materials for both, hydrogen reaction and ethanol oxidation.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"52 ","pages":"Article 101723"},"PeriodicalIF":7.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Harnessing instrumentation and artificial intelligence for new insights and applications in single-entity electrochemistry","authors":"Gabriel Gemadzie , Peter McPike , Aliaksei Boika","doi":"10.1016/j.coelec.2025.101724","DOIUrl":"10.1016/j.coelec.2025.101724","url":null,"abstract":"<div><div>The field of single-entity electrochemistry (SEE) has rapidly evolved, driven by innovative advancements in instrumentation, sophisticated data analysis powered by artificial intelligence (AI) and machine learning (ML), and an expanding range of applications across multiple disciplines. This review highlights significant recent progress in instrument developments that enhance the spatial and temporal resolution of SEE measurements, as well as data analysis employing AI methodologies to improve the processing, interpretation, and accuracy of complex electrochemical datasets. Additionally, we provide an overview of impactful recent applications of SEE in energy storage, catalysis, environmental monitoring, and biosensing, demonstrating the critical importance and transformative potential of single-entity measurements. By integrating advanced instrumentation with powerful data analytical frameworks, SEE continues to reveal unique insights at the nanoscale, bridging fundamental electrochemical research and practical applications.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"52 ","pages":"Article 101724"},"PeriodicalIF":7.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sensors and biosensors: From architecture to analytes","authors":"Rasa Pauliukaite","doi":"10.1016/j.coelec.2025.101721","DOIUrl":"10.1016/j.coelec.2025.101721","url":null,"abstract":"","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"52 ","pages":"Article 101721"},"PeriodicalIF":7.9,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Plastic waste upcycling through electrocatalysis","authors":"Yuan Ji, Chunxiao Liu, Tingting Zheng, Chuan Xia","doi":"10.1016/j.coelec.2025.101712","DOIUrl":"10.1016/j.coelec.2025.101712","url":null,"abstract":"<div><div>The widespread use and chemical durability of plastics have contributed to the escalating issue of white pollution. Among various mitigation strategies, recycling waste plastics stands out as one of the most effective and sustainable solutions. Electrochemical methods, featuring mild operating conditions, tunable reaction selectivity, and low carbon emissions, have emerged as promising approaches for plastic recycling. This mini review offers a concise summary of recent advances in the electrocatalytic conversion of plastic waste. We highlight key strategies that involve the selective electrooxidation of monomers derived from plastic hydrolysis, the coupling of anodic and cathodic reactions to increase energy efficiency, and the incorporation of heteroatoms to expand the functionality of target products. We conclude by discussing emerging approaches for non-hydrolyzable plastics and the integration of electrocatalysis with complementary methods for broader applicability and scalable circular recycling.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"52 ","pages":"Article 101712"},"PeriodicalIF":7.9,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Detection and remediation of harmful algal blooms: Opportunities for electrochemists?","authors":"William S. Atkinson , Cleya Saju , Jake M. Yang","doi":"10.1016/j.coelec.2025.101711","DOIUrl":"10.1016/j.coelec.2025.101711","url":null,"abstract":"<div><div>Larger and more frequent recurrences of harmful algal blooms (HABs) are becoming an urgent challenge globally with potentially deadly and economically devastating consequences. HAB monitoring and remediation is a multidisciplinary field which would benefit from inputs from electrochemists. Phytoplankton cells naturally contain various biomarkers such as species-specific DNAs, toxins, and chlorophyll pigments which can be strategically targeted via electrochemistry, either directly or indirectly, for sensing purposes. In this review, we discuss recent electrochemical advances that enable early HAB warning systems with the inclusion of AI to be developed as well as the separation of algae from water via electrocoagulation methods.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"52 ","pages":"Article 101711"},"PeriodicalIF":7.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}