Current Opinion in Electrochemistry最新文献

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Overcoming dichotomy between surface and bulk of electrode: Conducting polymers

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-04-04 DOI: 10.1016/j.coelec.2025.101691

Viktor Gueskine , Penghui Ding , Reverant Crispin , Mikhail Vagin

The surface of the solid-state electrodes constructed from atomic crystals is inherently uncertain due to its chemical unsaturation as its atoms lack the surrounding by the atoms of the same type as in the bulk and its exposure to a different phase. This complicates the evaluation of properties for the high surface area electrodes achieved by porosity. Conducting polymers (CP) are intrinsically conductive molecular solids built from polymeric conjugated molecules without covalent bounds between them. The molecular character of CP implies the translation of identical state from the bulk to the surface of the film without additional surface-induced defects. The absence of covalent bonds between backbones enables the access of external electrolyte to individual chain of CP forming the electrical double layer at the molecular scale. Here we discuss the combination of molecular porosity of CP with its inherent selectivity of ion transport as a special case of porous electrode. We also discuss how the Gibbs phase rule can help in understanding CP electrochemistry.

引用次数: 0

Thermopower measurement and control in molecular junctions via diverse experimental approaches

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-04-03 DOI: 10.1016/j.coelec.2025.101690

František Vavrek, Magdaléna Hromadová

Organic molecular junctions are considered as promising building blocks of future nanoelectronic components including diodes, transistors, and integrated circuits. Experimental investigation of various properties of these junctions represents an essential part of molecular electronics research. Study of thermoelectric parameters such as the Seebeck coefficient has a prominent position, since it provides valuable information about the character of charge transport and the electronic structure of studied molecules. This review covers the latest experimental approaches on how to measure Seebeck coefficient in organic molecular junctions. The main focus of this work is aimed at improvements and upgrades introduced during the last several years in already well-established techniques, or in newly proposed ones. It also outlines the selected experimental results obtained with these techniques, having an impact on the knowledge in the field of molecular thermoelectrics by either observing novel features or explaining previously detected but unidentified phenomena.

引用次数: 0

Coupling scanning probe microscopy with nanofluidics for the electrochemical investigation of microorganisms at the nanoscale

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-04-03 DOI: 10.1016/j.coelec.2025.101689

Katarzyna Krukiewicz

Thanks to the possibility of an extracellular electron transfer, electroactive bacteria and their biofilms can be successfully applied in bioenergetics. To fully benefit from the energy they generate, it is necessary to understand the electrochemical interactions between the microorganisms and the surface at the nanoscale level. Fluidic force microscopy (FluidFM), a combination of scanning probe microscopy and nanofluidics, is a recently introduced technique that can be used to investigate the effect of surface physicochemistry on bacterial attachment/detachment, to modify individual cells, to quantify the effect of electric current on cell adhesion, and to couple the results of electrical and mechanical properties of a living matter. This review provides an overview of the potentially wide applicability of FluidFM in the field of electromicrobiology, highlighting current research gaps being an attractive area for studies of the researchers aiming to fully understand the complex processes occurring within biofilms at the nanoscale level.

引用次数: 0

Observation of quantum interference in single–molecule junctions via electrochemical gating

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-03-14 DOI: 10.1016/j.coelec.2025.101688

Jiayi Wu, Yuxuan Zhang, Maike Yang, Jie Bai, Wenjing Hong

Quantum interference effects arising from phase differences in coherent electron wavefunctions offer novel strategies for regulating electron transport of single molecules, and the experimental observation of quantum interference effects has persisted as a major research frontier in molecular electronics. Recent advances using electrochemical gating have achieved the experimental evidences of three fundamental quantum interference phenomena, including Breit-Wigner resonance, Mach-Zehnder interferometery and Fano resonance, at the room temperature, thereby completing the experimental verification of all known quantum interference effects at the single–molecule scale. This review summarizes the applications of electrochemical gating in electron coherent tunneling, discusses the experimental validation of quantum interference effects at the single–molecule scale, and prospects their potential applications in high-performance single-molecule transistor devices.

引用次数: 0

Materials advancements in electrochemically mediated carbon capture

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-03-10 DOI: 10.1016/j.coelec.2025.101680

Andong Liu, Yayuan Liu

Electrochemically mediated carbon capture (EMCC) has emerged as a promising technology for mitigating global warming, offering energy efficiency, environmental sustainability, and modular design flexibility. Despite its potential, the widespread adoption of EMCC systems faces challenges. Intrinsic issues, such as parasitic reactions and the limited reversibility of redox-active species, contribute to performance degradation over repeated carbon capture-release cycles. Additionally, scaling up bench-scale EMCC setups for industrial applications demands substantial efforts to overcome critical engineering bottlenecks. This review focuses on EMCC systems based on reversible mechanisms, highlighting recent advancements in material design from molecular to process levels to address the aforementioned challenges. We also provide perspectives on advancing the field through deeper fundamental understanding and the establishment of standardized evaluation protocols, aiming to accelerate the development and deployment of EMCC technologies at scale.

引用次数: 0

The emergence of automation in electrochemistry

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-03-08 DOI: 10.1016/j.coelec.2025.101679

Michael A. Pence , Gavin Hazen , Joaquín Rodríguez-López

Automated electrochemistry is emerging as a powerful tool to accelerate discoveries in important fields such as energy storage, catalysis, electrosynthesis, and electrochemical sensing, among others. Automated electrochemistry platforms (AEPs) offer the ability to increase the throughput of electrochemical experiments, reduce the workload of manual experimenters, and offer opportunities for enhanced reproducibility and transferability of experimental protocols. This review explores the design, capabilities, and applications of AEPs, highlighting platforms constructed with various fluid handling, motion control, and signal multiplexing capabilities for a variety of applications. Further, we highlight platforms that integrate automated synthesis and electrochemical characterization and we discuss the role of Bayesian optimization in autonomous experiments, enabling both performance optimization and mechanistic insight. Finally, we offer an outlook on the potential future directions of automated electrochemistry.

引用次数: 0

Innovating carbon-based electrodes for direct neurochemical detection along the brain-immune axis

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-03-04 DOI: 10.1016/j.coelec.2025.101678

Vivek Subedi, Sainath Mohan Kumar, Moriah E. Weese-Myers, Ashley E. Ross

The use of carbon-based electrodes for direct neurochemical detection along the brain-immune axis is emerging as a promising frontier. Carbon is commonly chosen as an electrode material due to its numerous advantages, including cost-effectiveness, high electrical conductivity, excellent chemical stability, wide electrochemical window, and biocompatibility. To further enhance performance, carbon fibers have been coated with nanomaterials including carbon nanotubes (CNTs), graphene, carbon nanospikes, among others. Traditional carbon electrodes—typically constructed from carbon fibers—are limited by their heterogeneity, which restricts their adaptability. Recent advancements have moved toward developing highly sensitive and selective carbon materials through customization. The current research is increasingly focused on developing alternative materials to replace carbon fibers, with the aim of preventing coating degradation, improving sensitivity, achieving frequency-independent properties, and lowering detection limits. This current opinion discusses the key innovations in modern carbon-based materials for brain-immune studies, with an emphasis on the importance of tailoring surfaces for specific analytes and applications.

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引用次数: 0

Leaving constraints of single nanopores and designing biomimetic nanopore arrays

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-02-28 DOI: 10.1016/j.coelec.2025.101677

Ethan Cao , Zuzanna S. Siwy

Single nanopores revolutionized biological and chemical sensing, enabled discovery and understanding of transport phenomena at nanoconfinement as well as preparation of biomimetic systems. Single nanopore research also inspired the development of nanofabrication techniques to achieve structures with fully controlled electrochemical properties. The time became mature to go a step further, namely, to leave the constraints of single nanopores and prepare nanopore arrays whose function is dictated by stimuli responsive properties of constituent nanopores. Such responsive arrays would mimic ionic circuitry of biological systems that rely on different types of channels. The developing field of nanopore arrays offers opportunities to prepare new types of biological sensors, ionic computing systems, including logic gates and mimics of the brain. These directions of research challenge scientists to develop experimental, theoretical, and modeling tools to design complex ionic systems with emergent functionalities.

引用次数: 0

In-situ spectroelectrochemical analysis for understanding photophysical properties of halide perovskite nanocrystals

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-02-27 DOI: 10.1016/j.coelec.2025.101676

Byeongsung Kim , Bárbara Vallejos-Díaz , Andrés F. Gualdrón-Reyes , Seog Joon Yoon , Donghoon Han

Halide perovskite nanocrystals (PNCs) are promising materials for optoelectronic devices and photocatalysts in solar photoelectrochemical (PEC) reactions due to their redox properties. These systems rely on effective charge separation, recombination, and transport under electrochemical bias or light irradiation within charge-transporting environments. However, the stability of PNCs is significantly influenced by the solvents and electrolytes used, often leading to irreversible structural transformations and loss of intrinsic properties. This review emphasizes the importance of electrochemical and in-situ spectroelectrochemical techniques for characterizing PNCs’ redox properties, band structure, and halide defect sites that drive redox reactions and structural deformation. The discussion provides insights into modifying PNCs for use in optoelectronic devices or PEC cells and introduces innovative strategies to enhance their structural stability and improve device performance. This comprehensive analysis aims to bridge material stability and functional optimization in PNC-based applications.

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引用次数: 0

Intricacies in the electrochemical interface due to the surface structure and surface electronics states and their probing

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-02-27 DOI: 10.1016/j.coelec.2025.101675

Ashis Kumar Satpati , Sudipa Manna

Electrochemical interface is complex, which has led to significant research interest in the field of analytical chemistry, biochemistry, and materials science. The present article provides a brief overview of the surface structure, surface electronic states, and their electrochemical aspects that are having implications in the energy harvesting and storage and also in the development of sensor. Discussions have been extended to the surface states in layer materials, single atom catalysis (SAC), and dual atom catalysis (DAC) along with their brief synthesis protocols. A few important characterization tools, along with examples, are discussed in this short review.

引用次数: 0

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