Pub Date : 2025-12-01Epub Date: 2025-10-14DOI: 10.1016/j.coelec.2025.101770
Maryam Awan, Aqsa Khan, Jehad Abdelnabi, Silvana Andreescu
The growing demand for food quality, safety and sustainability is driving the adoption of cost-effective real-time monitoring systems across the agricultural and food chain. This review critically examines the status of electrochemical biosensors for monitoring key agri-food targets including bacteria and foodborne contaminants, nutritional components, pesticide residues, soil nutrients, fertilizers and environmental pollutants, and their potential to address global food challenges. Following an overview of sensor types, target analytes, detection mechanisms and performance metrics, we discuss key barriers to field deployment such as stability, matrix interference, calibration, standardization and user acceptance. Proposed solutions such as integration with mobile platforms, data analytics and intuitive interfaces are outlined as potential pathways to accelerate adoption. With further development, electrochemical biosensors have the potential to become powerful tools in data-driven decision support systems, enabling precision agriculture, risk assessment and improved food quality.
{"title":"Electrochemical biosensors for smart agri-food monitoring and decision support","authors":"Maryam Awan, Aqsa Khan, Jehad Abdelnabi, Silvana Andreescu","doi":"10.1016/j.coelec.2025.101770","DOIUrl":"10.1016/j.coelec.2025.101770","url":null,"abstract":"<div><div>The growing demand for food quality, safety and sustainability is driving the adoption of cost-effective real-time monitoring systems across the agricultural and food chain. This review critically examines the status of electrochemical biosensors for monitoring key agri-food targets including bacteria and foodborne contaminants, nutritional components, pesticide residues, soil nutrients, fertilizers and environmental pollutants, and their potential to address global food challenges. Following an overview of sensor types, target analytes, detection mechanisms and performance metrics, we discuss key barriers to field deployment such as stability, matrix interference, calibration, standardization and user acceptance. Proposed solutions such as integration with mobile platforms, data analytics and intuitive interfaces are outlined as potential pathways to accelerate adoption. With further development, electrochemical biosensors have the potential to become powerful tools in data-driven decision support systems, enabling precision agriculture, risk assessment and improved food quality.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"54 ","pages":"Article 101770"},"PeriodicalIF":6.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462590","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}
Pub Date : 2025-10-01Epub Date: 2025-07-05DOI: 10.1016/j.coelec.2025.101727
Nicci L. Fröhlich, Marc T.M. Koper
Despite extensive research, the double-layer structure at Pt/aqueous electrolyte interfaces (quantified by the double-layer capacitance, Cdl) remains incompletely understood as even for the model Pt(111)/HClO4 interface, anomalous Cdl trends have been reported. These trends were previously ascribed to differences in measurement techniques (i.e. 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 Cdl trends are not measurement artefacts but instead reflect intrinsic properties of the Pt(111)/HClO4 interface, necessitating continued investigation. We further highlight the complexity introduced by electrosorbed Hads and/or OHads species resulting from catalytic H2O dissociation, which contribute an adsorption (pseudo)capacitance, Cads. This complicates the deconvolution of Cdl 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 Cdl values from prior studies.
{"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":"2025-10-01","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}
Pub Date : 2025-10-01Epub Date: 2025-08-05DOI: 10.1016/j.coelec.2025.101738
Ahmet Cetinkaya , S. Irem Kaya , Sibel A. Ozkan
Electrochemical biosensors are preferred in many areas due to their advantages, such as high sensitivity, miniaturization, low cost, and versatility. Early and accurate diagnosis of diseases is the primary step in preventing the spread and progression of the disease and in applying the proper treatment options, which is possible thanks to diagnostic biomarkers. In this context, electrochemical biosensors are practical and effective tools for rapidly and reliably determining biomarkers. Many studies are in the literature due to the versatility of electrochemical biosensors and the ability to improve performance through integration with fields such as nanotechnology and molecular imprinting technology. This short review highlights the most recent and interesting studies on this subject and provides insight into future developments.
{"title":"Biomedical field applications of electrochemical biosensors as diagnostic tools: A short review","authors":"Ahmet Cetinkaya , S. Irem Kaya , Sibel A. Ozkan","doi":"10.1016/j.coelec.2025.101738","DOIUrl":"10.1016/j.coelec.2025.101738","url":null,"abstract":"<div><div>Electrochemical biosensors are preferred in many areas due to their advantages, such as high sensitivity, miniaturization, low cost, and versatility. Early and accurate diagnosis of diseases is the primary step in preventing the spread and progression of the disease and in applying the proper treatment options, which is possible thanks to diagnostic biomarkers. In this context, electrochemical biosensors are practical and effective tools for rapidly and reliably determining biomarkers. Many studies are in the literature due to the versatility of electrochemical biosensors and the ability to improve performance through integration with fields such as nanotechnology and molecular imprinting technology. This short review highlights the most recent and interesting studies on this subject and provides insight into future developments.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101738"},"PeriodicalIF":6.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863195","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}
Pub Date : 2025-10-01Epub Date: 2025-07-15DOI: 10.1016/j.coelec.2025.101730
Miriam Chávez , Fabiana Arduini , Alberto Escarpa
The emergence of three-dimensional (3D)-printing as a fabrication tool has revolutionized the development of customized electrochemical (bio)sensors, offering exceptional design flexibility, cost-effective and rapid prototyping. Among the additive manufacturing technologies, fused deposition modeling (FDM) stands out for its affordability, ease of use, and the growing availability of conductive filaments, providing a new approach to produce tailored electrodes with enormous analytical potential and capabilities. This perspective presents a critical overview of the current opportunities and limitations of FDM-3D-printing as a technology for the design and development of electrochemical (bio)sensors, addressing material formulation, electrode architecture, surface modification strategies, analytical performance, and emerging applications. Current challenges and directions to overcome them are identified and discussed, drawing a realistic horizon for the next generation of FDM-3D-printed electrochemical (bio)sensors.
{"title":"Shaping the next-generation of fused deposition modeling three-dimensional-printing-based electrochemical (bio)sensing: Drawing a realistic horizon","authors":"Miriam Chávez , Fabiana Arduini , Alberto Escarpa","doi":"10.1016/j.coelec.2025.101730","DOIUrl":"10.1016/j.coelec.2025.101730","url":null,"abstract":"<div><div>The emergence of three-dimensional (3D)-printing as a fabrication tool has revolutionized the development of customized electrochemical (bio)sensors, offering exceptional design flexibility, cost-effective and rapid prototyping. Among the additive manufacturing technologies, fused deposition modeling (FDM) stands out for its affordability, ease of use, and the growing availability of conductive filaments, providing a new approach to produce tailored electrodes with enormous analytical potential and capabilities. This perspective presents a critical overview of the current opportunities and limitations of FDM-3D-printing as a technology for the design and development of electrochemical (bio)sensors, addressing material formulation, electrode architecture, surface modification strategies, analytical performance, and emerging applications. Current challenges and directions to overcome them are identified and discussed, drawing a realistic horizon for the next generation of FDM-3D-printed electrochemical (bio)sensors.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101730"},"PeriodicalIF":6.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766724","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}
Pub Date : 2025-10-01Epub Date: 2025-07-25DOI: 10.1016/j.coelec.2025.101737
Tathagata Bhattacharjya , Martin–Alex Nalepa , Ivan Dědek , Petr Jakubec , David Panáček , Michal Otyepka
Non-communicable diseases, including cancer, cardiovascular diseases, diabetes, and neurological disorders, represent a growing global health challenge, driving an urgent need for rapid, sensitive, and affordable diagnostic technologies. Graphene-based materials, with their exceptional physicochemical properties, offer transformative potential for the development of next-generation electrochemical biosensors. This review highlights recent advancements in the use of graphene derivatives (such as reduced graphene oxide, graphene quantum dots, laser-induced graphene, and covalently functionalized graphene) for the electrochemical detection of key biomarkers associated with major non-communicable diseases. We critically analyze strategies for enhancing biosensor performance, discuss innovations in biomarker recognition and real-sample validation, and underscore emerging trends toward wearable, minimally invasive platforms. Particular emphasis is placed on the challenges of selectivity, stability, and clinical translation, as well as on the need for reproducible material synthesis and device standardization. By bridging material science with biomedical applications, graphene-based biosensors are poised to enable earlier diagnosis, continuous monitoring, and improved management of non-communicable diseases, ultimately contributing to the advancement of global healthcare.
{"title":"Recent advances in graphene-based electrochemical biosensors for major non-communicable diseases","authors":"Tathagata Bhattacharjya , Martin–Alex Nalepa , Ivan Dědek , Petr Jakubec , David Panáček , Michal Otyepka","doi":"10.1016/j.coelec.2025.101737","DOIUrl":"10.1016/j.coelec.2025.101737","url":null,"abstract":"<div><div>Non-communicable diseases, including cancer, cardiovascular diseases, diabetes, and neurological disorders, represent a growing global health challenge, driving an urgent need for rapid, sensitive, and affordable diagnostic technologies. Graphene-based materials, with their exceptional physicochemical properties, offer transformative potential for the development of next-generation electrochemical biosensors. This review highlights recent advancements in the use of graphene derivatives (such as reduced graphene oxide, graphene quantum dots, laser-induced graphene, and covalently functionalized graphene) for the electrochemical detection of key biomarkers associated with major non-communicable diseases. We critically analyze strategies for enhancing biosensor performance, discuss innovations in biomarker recognition and real-sample validation, and underscore emerging trends toward wearable, minimally invasive platforms. Particular emphasis is placed on the challenges of selectivity, stability, and clinical translation, as well as on the need for reproducible material synthesis and device standardization. By bridging material science with biomedical applications, graphene-based biosensors are poised to enable earlier diagnosis, continuous monitoring, and improved management of non-communicable diseases, ultimately contributing to the advancement of global healthcare.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101737"},"PeriodicalIF":6.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829523","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}
Pub Date : 2025-10-01Epub Date: 2025-07-08DOI: 10.1016/j.coelec.2025.101729
Susana Campuzano , Maria Gamella , José M. Pingarrón
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.
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.
{"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":"2025-10-01","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}
Pub Date : 2025-10-01Epub Date: 2025-07-25DOI: 10.1016/j.coelec.2025.101736
Arzum Erdem, Huseyin Senturk, Cengiz Altınsoy
Electrochemical impedance spectroscopy (EIS)-based aptasensors combine the high selectivity of aptamers as biorecognition elements with the label-free, sensitive, and noninvasive measurement capabilities of EIS. Owing to these features, they have recently attracted considerable attention, offering a wide range of applications from the early diagnosis of numerous biomarkers in the field of healthcare to food safety and environmental analysis. In this review, the fundamental principles of impedimetric aptasensors are discussed, and studies published over the last two years in the fields of health, food, and environment are comprehensively examined. In this context, recent original research on the development of aptasensors for the detection of various analytes including cancer biomarkers, viral and bacterial pathogens, mycotoxins, antibiotic residues, hormones, and heavy metals has been analyzed in detail. Moreover, recent findings supporting the applicability of these aptasensors in complex biological (e.g. serum, plasma, saliva, urine), food (e.g. milk, fruit juice, cereal products), and environmental (e.g. wastewater, river water) sample matrices have been summarized. Additionally, key application-oriented challenges such as optimization of surface chemistry for aptamer immobilization, minimization of matrix effects, sensor surface stability, repeatability/reproducibility, multiplex detection, and integration into portable platforms have been thoroughly discussed. Furthermore, innovative solutions that could facilitate the transition of this technology into clinical and field applications, as well as future perspectives regarding commercialization, have been presented. In this regard, it is emphasized that impedimetric aptasensors possess strong potential not only at the laboratory scale but also as powerful tools for real-world diagnostic and monitoring applications.
{"title":"Impedimetric aptasensors: Emerging tools for sensitive detection in health, food, and environmental monitoring","authors":"Arzum Erdem, Huseyin Senturk, Cengiz Altınsoy","doi":"10.1016/j.coelec.2025.101736","DOIUrl":"10.1016/j.coelec.2025.101736","url":null,"abstract":"<div><div>Electrochemical impedance spectroscopy (EIS)-based aptasensors combine the high selectivity of aptamers as biorecognition elements with the label-free, sensitive, and noninvasive measurement capabilities of EIS. Owing to these features, they have recently attracted considerable attention, offering a wide range of applications from the early diagnosis of numerous biomarkers in the field of healthcare to food safety and environmental analysis. In this review, the fundamental principles of impedimetric aptasensors are discussed, and studies published over the last two years in the fields of health, food, and environment are comprehensively examined. In this context, recent original research on the development of aptasensors for the detection of various analytes including cancer biomarkers, viral and bacterial pathogens, mycotoxins, antibiotic residues, hormones, and heavy metals has been analyzed in detail. Moreover, recent findings supporting the applicability of these aptasensors in complex biological (e.g. serum, plasma, saliva, urine), food (e.g. milk, fruit juice, cereal products), and environmental (e.g. wastewater, river water) sample matrices have been summarized. Additionally, key application-oriented challenges such as optimization of surface chemistry for aptamer immobilization, minimization of matrix effects, sensor surface stability, repeatability/reproducibility, multiplex detection, and integration into portable platforms have been thoroughly discussed. Furthermore, innovative solutions that could facilitate the transition of this technology into clinical and field applications, as well as future perspectives regarding commercialization, have been presented. In this regard, it is emphasized that impedimetric aptasensors possess strong potential not only at the laboratory scale but also as powerful tools for real-world diagnostic and monitoring applications.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101736"},"PeriodicalIF":6.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863194","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}
Pub Date : 2025-10-01Epub Date: 2025-07-22DOI: 10.1016/j.coelec.2025.101732
Glen McClea , Laura Titheridge , Steven Matthews , Aaron T. Marshall
Conventional industrial alkaline water electrolysis electrodes made using plasma spray deposition are unable to produce and sustain the demanding performance requirements needed to achieve economic targets. State-of-the-art lab-scale alkaline electrolysis configurations can achieve these higher performances; however, given their complex electrode architecture and production methods, often suffer from practical limitations regarding scale-up. Proven and trusted by industry, plasma spraying offers a pragmatic and cost-effective method for fabricating these next-generation electrodes at scale. This review explores the most recent advances in plasma-sprayed electrode development, covering its use to form both the active catalyst layer and the porous transport layer. We also highlight how these findings can be transferred to benefit the development of other industrial process electrodes. This review aims to provide pathways for future research, showing how novel lab-scale electrodes can be replicated at scale, with the latest in plasma-spray technology.
{"title":"Next-generation plasma-sprayed electrodes for water electrolysis and beyond: Recent advances and future directions","authors":"Glen McClea , Laura Titheridge , Steven Matthews , Aaron T. Marshall","doi":"10.1016/j.coelec.2025.101732","DOIUrl":"10.1016/j.coelec.2025.101732","url":null,"abstract":"<div><div>Conventional industrial alkaline water electrolysis electrodes made using plasma spray deposition are unable to produce and sustain the demanding performance requirements needed to achieve economic targets. State-of-the-art lab-scale alkaline electrolysis configurations can achieve these higher performances; however, given their complex electrode architecture and production methods, often suffer from practical limitations regarding scale-up. Proven and trusted by industry, plasma spraying offers a pragmatic and cost-effective method for fabricating these next-generation electrodes at scale. This review explores the most recent advances in plasma-sprayed electrode development, covering its use to form both the active catalyst layer and the porous transport layer. We also highlight how these findings can be transferred to benefit the development of other industrial process electrodes. This review aims to provide pathways for future research, showing how novel lab-scale electrodes can be replicated at scale, with the latest in plasma-spray technology.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101732"},"PeriodicalIF":6.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828230","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}
Pub Date : 2025-10-01Epub Date: 2025-07-09DOI: 10.1016/j.coelec.2025.101728
Maxime Decker , Quentin Lenne , Jalal Ghilane , Carlos M. Sánchez-Sánchez
Local pH refers to the pH gradient developed within the diffusion layer of the electrode, which can deviate significantly from the bulk value due to proton consumption or generation during electrocatalytic reactions. The proton availability is often a thermodynamic or kinetic limiting factor during electrocatalytic reactions involving proton–electron transfer as the determining step. Thus, controlling local pH can effectively impact both reaction selectivity and activity. In this short review, we present recent advances and strategies that emerged to effectively tune the local pH and impact on different electrocatalytic reactions, such as CO2 reduction reaction (CO2RR), electrochemical nitrate reduction (ENR), O2 reduction reaction, (ORR) and ethanol oxidation reaction (EOR). The catalyst engineering approach through microenvironment modification, tuning mass transport conditions by catalyst size and porosity, as well as by pulsed potential electrolysis are the strategies described here.
{"title":"Local pH engineering to impact electrocatalysis","authors":"Maxime Decker , Quentin Lenne , Jalal Ghilane , Carlos M. Sánchez-Sánchez","doi":"10.1016/j.coelec.2025.101728","DOIUrl":"10.1016/j.coelec.2025.101728","url":null,"abstract":"<div><div>Local pH refers to the pH gradient developed within the diffusion layer of the electrode, which can deviate significantly from the bulk value due to proton consumption or generation during electrocatalytic reactions. The proton availability is often a thermodynamic or kinetic limiting factor during electrocatalytic reactions involving proton–electron transfer as the determining step. Thus, controlling local pH can effectively impact both reaction selectivity and activity. In this short review, we present recent advances and strategies that emerged to effectively tune the local pH and impact on different electrocatalytic reactions, such as CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR), electrochemical nitrate reduction (ENR), O<sub>2</sub> reduction reaction, (ORR) and ethanol oxidation reaction (EOR). The catalyst engineering approach through microenvironment modification, tuning mass transport conditions by catalyst size and porosity, as well as by pulsed potential electrolysis are the strategies described here.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101728"},"PeriodicalIF":6.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757522","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}
Pub Date : 2025-10-01Epub Date: 2025-07-02DOI: 10.1016/j.coelec.2025.101726
Samantha C. Cullom , Jeffrey E. Dick
Modern electrochemistry places a heavy emphasis on the importance of thermodynamic measurements for environmental sensing. While most electrochemical sensors require some type of binding mechanism, analytes do not bind to sensors instantaneously; the binding process takes time, suggesting that we must examine reaction kinetics as well. With emerging environmental pollutants of concern, such as per- and polyfluoroalkyl substances (PFAS), electrochemists must consider the kinetic relationship between the electrochemical sensor and the analyte. Various types of environmental electrochemical sensors, such as enzymes, antibodies, aptamers, and molecularly imprinted polymers (MIPs), exist. Each type of sensor can be used in the environment, but MIPs have recently demonstrated strong potential to qualitatively and quantitatively detect and identify PFAS species at the earliest onset of environmental contamination. Additionally, the mathematical and experimental approaches to MIP binding have room to expand beyond the thermodynamic isotherm models and into a time-dependent kinetic model.
{"title":"Time: The potentially powerful, often-overlooked variable in electrochemical sensing of per- and polyfluoroalkyl substances","authors":"Samantha C. Cullom , Jeffrey E. Dick","doi":"10.1016/j.coelec.2025.101726","DOIUrl":"10.1016/j.coelec.2025.101726","url":null,"abstract":"<div><div>Modern electrochemistry places a heavy emphasis on the importance of thermodynamic measurements for environmental sensing. While most electrochemical sensors require some type of binding mechanism, analytes do not bind to sensors instantaneously; the binding process takes time, suggesting that we must examine reaction kinetics as well. With emerging environmental pollutants of concern, such as per- and polyfluoroalkyl substances (PFAS), electrochemists must consider the kinetic relationship between the electrochemical sensor and the analyte. Various types of environmental electrochemical sensors, such as enzymes, antibodies, aptamers, and molecularly imprinted polymers (MIPs), exist. Each type of sensor can be used in the environment, but MIPs have recently demonstrated strong potential to qualitatively and quantitatively detect and identify PFAS species at the earliest onset of environmental contamination. Additionally, the mathematical and experimental approaches to MIP binding have room to expand beyond the thermodynamic isotherm models and into a time-dependent kinetic model.</div></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"53 ","pages":"Article 101726"},"PeriodicalIF":6.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780048","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号