Current Opinion in Electrochemistry最新文献

英文中文

Single-entity electrochemistry: Unveiling nanoparticle behavior with advanced scanning probe electrochemical techniques 单实体电化学：揭示纳米粒子行为与先进的扫描探针电化学技术

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-22 DOI: 10.1016/j.coelec.2025.101710

Aruchamy Gowrisankar , Vishal Pandurang Bhandigare , Kyungsoon Park , Byung-Kwon Kim

The advancement of sophisticated electroanalytical techniques has attracted significant interest in investigating the fundamental properties of individual nanoparticles. This review highlights recent developments in scanning probe microscopy (SPM), including scanning electrochemical cell microscopy (SECCM), electrochemical scanning tunneling microscopy (EC-STM), and electrochemical atomic force microscopy (EC-AFM). These SPM techniques provide complementary insights into nanoparticle size, morphology, electronic structure, and surface reactivity. SECCM enables localized electrochemical analysis with high spatial resolution, while EC-STM and EC-AFM facilitate nanoscale imaging and the identification of active sites involved in electrocatalytic reactions. One of the most promising strategies involves integrating these techniques to establish structure–activity correlations at the single-nanoparticle level, thereby enhancing characterization capabilities. We demonstrate how hybrid characterization techniques can be employed to capture in situ information during complex electrochemical processes at the electrode–electrolyte interface. Specifically, we highlight the monitoring and measurement of local electrochemical processes using high-spatial-resolution imaging in correlation with single-entity electrochemistry techniques.

复杂电分析技术的进步引起了人们对研究单个纳米粒子基本特性的极大兴趣。本文综述了扫描探针显微镜（SPM）的最新进展，包括扫描电化学电池显微镜（SECCM）、电化学扫描隧道显微镜（EC-STM）和电化学原子力显微镜（EC-AFM）。这些SPM技术提供了对纳米颗粒尺寸、形态、电子结构和表面反应性的补充见解。SECCM能够实现高空间分辨率的局部电化学分析，而EC-STM和EC-AFM有助于纳米级成像和识别参与电催化反应的活性位点。最有希望的策略之一是整合这些技术，在单纳米颗粒水平上建立结构-活性相关性，从而提高表征能力。我们演示了如何使用混合表征技术在电极-电解质界面的复杂电化学过程中捕获原位信息。具体来说，我们强调使用与单一实体电化学技术相关的高空间分辨率成像来监测和测量局部电化学过程。

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引用次数: 0

Recent progress and prospects in single-atom catalyst-based electrochemical synthesis of ammonia 基于单原子催化剂的电化学合成氨研究进展与展望

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-19 DOI: 10.1016/j.coelec.2025.101708

Muhammad Yasir , Zhiliang Zhao , Hasuck Kim , Xinyi Zhang

Single-atom catalysts (SACs), with atomically distributed metal centers, high activity and maximized atom utilization efficiency, have attracted great attention in catalysis. Great efforts have been made on the development of new strategies for the synthesis of single-atom catalysts. In the design of SACs, substrates are materials that host the single atoms, providing a stable and accessible surface for catalytic reactions. The interaction between the single metal atoms and the substrate (carrier or support) is critical as it determines the stability and activity of the catalyst. Unraveling the substrate adsorption structure–performance relationship is pivotal for supported metal single-atom catalysts. On the other hand, the catalytic performance largely depends on the interaction among single atoms. In this review, we summarize in SACs-based electrochemical synthesis of ammonia. The reaction mechanism of these single-atom catalysts and their applications are discussed and assessed. Finally, the perspectives of SACs for future applications are previewed.

单原子催化剂具有金属中心原子分布、活性高、原子利用效率高等特点，在催化领域受到广泛关注。在单原子催化剂合成的新策略的开发上已经做出了很大的努力。在sac的设计中，衬底是承载单原子的材料，为催化反应提供稳定和可接近的表面。单个金属原子与底物（载体或载体）之间的相互作用至关重要，因为它决定了催化剂的稳定性和活性。揭示底物吸附结构-性能关系对负载型金属单原子催化剂的研究至关重要。另一方面，催化性能很大程度上取决于单原子间的相互作用。本文综述了基于sacs的电化学合成氨的研究进展。对这些单原子催化剂的反应机理及其应用进行了讨论和评价。最后，对sac的未来应用前景进行了展望。

引用次数: 0

Corrigendum to “Application of pulsed electrolysis in organic electrosynthesis” [Curr Opin Electrochem 44 (2024) 101441] “脉冲电解在有机电合成中的应用”的更正[Curr Opin Electrochem 44 (2024) 101441]

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-13 DOI: 10.1016/j.coelec.2025.101709

Alexander P. Atkins, Alastair J.J. Lennox

引用次数: 0

The role of anions and additives in electrochemical CO2 reduction 阴离子和添加剂在电化学CO2还原中的作用

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-10 DOI: 10.1016/j.coelec.2025.101707

Katharina Trapp, Jimun Yoo , Maria R. Lukatskaya

The electrochemical reduction of CO₂ (eCO₂R) is governed by complex interactions at the electrode-electrolyte interface. Recent studies show that electrolyte species in the electrical double layer can strongly affect the CO₂ reduction activity and selectivity. While the role of cations in eCO₂R is relatively well understood, recent studies show that anions and molecular additives can be equally influential. Here, we discuss how these species can facilitate eCO₂R intermediate stabilization and suppress the hydrogen evolution reaction, enhancing the activity and selectivity of eCO₂R.

CO2 （eCO2R）的电化学还原是由电极-电解质界面复杂的相互作用控制的。近年来的研究表明，电双层中电解质的种类对CO2的还原活性和选择性有很大的影响。虽然阳离子在eCO2R中的作用已经得到了很好的理解，但最近的研究表明，阴离子和分子添加剂也可能具有同样的影响。本文探讨了这些物种如何促进eCO2R的中间稳定和抑制析氢反应，从而提高eCO2R的活性和选择性。

引用次数: 0

Enhanced stability of monolayers for quantum transport applications 在量子输运应用中增强单层膜的稳定性

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-08 DOI: 10.1016/j.coelec.2025.101706

Gyu Don Kong, Xin He, Peng He, Hyo Jae Yoon

Recent advances in self-assembled monolayers (SAMs) have overcome longstanding stability challenges, unlocking new opportunities for molecular-scale devices in quantum transport applications. This review highlights key developments focused on enhancing the electrical and thermal robustness of SAMs. The Repeated Surface Exchange of Molecules (ReSEM) method significantly improves breakdown voltages by mixing two molecular species to reduce packing defects and nanoscale pinholes, enabling access to deeper molecular orbital energy levels. Additionally, N-heterocyclic carbene (NHC) anchor groups deliver exceptional thermal stability, sustaining consistent thermoelectric performance at temperatures up to 573 K. These breakthroughs expand the functional versatility of SAM-based molecular junctions, paving the way for their integration into practical electronic, thermoelectric, and sensing technologies.

自组装单层（SAMs）的最新进展克服了长期存在的稳定性挑战，为量子传输应用中的分子尺度器件带来了新的机遇。这篇综述强调了在增强地对空导弹的电和热稳健性方面的关键进展。分子重复表面交换（ReSEM）方法通过混合两种分子来减少包装缺陷和纳米级针孔，从而显著提高击穿电压，从而可以进入更深的分子轨道能级。此外，n -杂环碳（NHC）锚基团具有优异的热稳定性，在高达573 K的温度下保持一致的热电性能。这些突破扩展了基于sam的分子结的功能多功能性，为它们集成到实用的电子、热电和传感技术中铺平了道路。

引用次数: 0

Effect of cations on the electro-oxidation of alcohols and polyols on Pt: Activity, selectivity, and mechanistic insights 阳离子对醇和多元醇电氧化对铂的影响：活性、选择性和机理

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-07 DOI: 10.1016/j.coelec.2025.101705

Victor Y. Yukuhiro , Alan J. Gibson , Elton Sitta , Angel Cuesta , Pablo S. Fernández

Understanding the role of cations in the electro-oxidation of alcohols and polyols (EOAP) on Pt electrodes is essential for optimizing electrocatalytic processes in energy conversion and chemical production. This review explores how cations modulate activity, selectivity, and dynamic behavior during the EOAP. Larger cations, such as K⁺, enhance reaction rates and facilitate C–C bond cleavage, whereas smaller cations like Li⁺ promote CO_ad oxidation and the formation of inactive Pt oxides. The interplay between cations, adsorbed intermediates, and the electrode surface is analysed using complementary electrochemical and in situ spectroscopic techniques, covering hypotheses proposed to explain these observations. Despite progress, fundamental questions remain regarding the microscopic origins of cation effects, including the relative stabilities of key intermediates, how these stabilities influence their formation and oxidation, and ultimately how they govern the deactivation of Pt surfaces via the formation of inactive Pt oxides.

了解阳离子在Pt电极上醇和多元醇（EOAP）电氧化中的作用，对于优化能量转换和化工生产中的电催化过程至关重要。这篇综述探讨了阳离子在EOAP过程中如何调节活性、选择性和动态行为。较大的阳离子，如K+，提高反应速率，促进C-C键的裂解，而较小的阳离子，如Li+，促进COad氧化和活性Pt氧化物的形成。利用互补的电化学和原位光谱技术分析了阳离子、吸附中间体和电极表面之间的相互作用，并提出了解释这些观察结果的假设。尽管取得了进展，但关于阳离子效应的微观起源的基本问题仍然存在，包括关键中间体的相对稳定性，这些稳定性如何影响它们的形成和氧化，以及它们最终如何通过形成非活性Pt氧化物来控制Pt表面的失活。

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引用次数: 0

Electrochemical analysis in micrometer and nanometer-sized droplets on a surface: From static toward dynamic 表面微米级和纳米级液滴的电化学分析：从静态到动态

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-03 DOI: 10.1016/j.coelec.2025.101704

Liang Liu

This mini-review discusses about the recent progress in electrochemical analysis of micrometer- and nanometer-sized droplets. The static droplet on a support is only briefly mentioned, with the focus placed on dynamic droplets that hit, land, and evolve on electrodes. The analysis of hitting droplets generally follows the norm of single-entity electrochemistry, which tracks collision events between the droplet and the electrodes. The landing droplet approach confines the electrochemical measurements in the area of droplet/sample contact. In general, we emphasize that the droplet is not a solid object; it may dynamically deform before, during, and after hitting or landing on the electrode surface, as governed by interfacial tensions. These tensions can be affected by the chemical reactions occurring at the droplet/electrode or droplet/environment interface, which is often underestimated. Thus, unifying the treatment of shape and composition changes considering conjugated physical and chemical effect would be highly desired in future.

本文综述了微米级和纳米级液滴的电化学分析的最新进展。在支架上的静态液滴只是简单地提到了，重点放在了在电极上撞击、降落和演变的动态液滴上。撞击液滴的分析一般遵循单实体电化学的规范，跟踪液滴与电极之间的碰撞事件。着陆液滴法将电化学测量限制在液滴/样品接触区域。一般来说，我们强调液滴不是固体；它可能在撞击或落在电极表面之前、期间和之后动态变形，这是由界面张力控制的。这些张力可能受到发生在液滴/电极或液滴/环境界面的化学反应的影响，这通常被低估了。因此，考虑共轭物理和化学效应的形状和组成变化的统一处理是未来的迫切需要。

引用次数: 0

In-situ high-throughput nanoelectrochemistry for battery characterization 原位高通量纳米电化学电池表征

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-03 DOI: 10.1016/j.coelec.2025.101693

Si-Min Lu, Jean-François Lemineur, Jean-Marc Noël, Frédéric Kanoufi

A comprehensive understanding of dynamic structure–activity relationships in materials under operating conditions is essential for improving the efficiency, performance, and lifespan of rechargeable battery systems. Traditional characterization techniques struggle to capture real-time processes within the battery “black box.” The emergence of nanoelectrochemistry provides diverse in-situ and high-throughput toolkits for probing material dynamics at the electrode–electrolyte nanointerface. This review highlights two representative techniques, collision electrochemistry and scanning electrochemical cell microscopy, and demonstrates their ability to monitor transient mass transport and charge transfer kinetics in battery materials and interfaces at nanodomains with sub-millisecond resolution. Additionally, it explores the potential of high-resolution optical imaging to achieve nanoscale visualization of structural spatiodynamics at the single particle–electrolyte interface during charge/discharge over multiple time scales, ranging from milliseconds to hours. Finally, future advancements are envisioned to enable accelerated mechanistic insights, rational material design, and automated discovery of next-generation battery materials.

全面了解材料在工作条件下的动态结构-活性关系对于提高可充电电池系统的效率、性能和寿命至关重要。传统的表征技术难以捕捉电池“黑匣子”中的实时过程。纳米电化学的出现为探测电极-电解质纳米界面上的材料动力学提供了多种原位和高通量的工具。本文重点介绍了两种具有代表性的技术，碰撞电化学和扫描电化学电池显微镜，并展示了它们在亚毫秒分辨率的纳米域监测电池材料和界面中的瞬态质量传递和电荷转移动力学的能力。此外，它还探索了高分辨率光学成像的潜力，可以在多个时间尺度（从毫秒到小时）上实现充电/放电过程中单粒子-电解质界面结构空间动力学的纳米级可视化。最后，展望未来的发展，以加速机械洞察，合理的材料设计，并自动发现下一代电池材料。

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引用次数: 0

Recent advances in all-iron flow batteries (AIFBs) 全铁液流电池的研究进展

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-05-01 DOI: 10.1016/j.coelec.2025.101702

Tiantian Lei , Yifeng Xu , Yao Li , Liyun Huang , Li Ma , Daiqiang Si , Kairui Wang , Fengmei Wang , Jiquan Liu , Lin Lei , Liping Cao , Ying Yang

The cost of active material for all-vanadium flow batteries is high, so that all-iron flow batteries (AIFBs) may be a good choice for decreasing the cost of redox flow batteries. However, there are some problems such as iron dendrite and hydrogen evolution in acidic AIFBs, and hydrolysis and precipitation of iron hydroxide in alkaline AIFBs. This review reveals the underlying causes of these problems, and summarizes recent researchers’ solutions to these problems. In addition, this review discusses the effect of different ligands on the electrode potential of negolytes and raises prospects for the future trends of research on the AIFBs.

全钒液流电池的活性材料成本较高，因此全铁液流电池可能是降低氧化还原液流电池成本的一个很好的选择。但酸性AIFBs存在铁枝晶和析氢问题，碱性AIFBs存在氢氧化铁水解和沉淀问题。这篇综述揭示了这些问题的潜在原因，并总结了近年来研究人员对这些问题的解决方案。此外，本文还讨论了不同配体对未成熟细胞电极电位的影响，并对其未来的研究趋势进行了展望。

引用次数: 0

The role of water and cations in shaping electrified interfaces: Insights from Raman and FTIR spectroscopy 水和阳离子在形成带电界面中的作用：来自拉曼和FTIR光谱的见解

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-04-28 DOI: 10.1016/j.coelec.2025.101701

Jéssica Alves Nogueira, Lucas Dias Germano, Leonardo Domenico De Angelis, Susana Inés Córdoba de Torresi

A detailed understanding of the structural dynamics of water at the electrode/electrolyte interface is essential for deciphering and improving electrocatalyst performance. This review highlights innovative uses of Raman and Fourier Transform Infrared spectroscopy to probe interfacial water under electrochemical conditions. Moving beyond conventional approaches, we discuss strategies that evaluate the influence of electrolyte composition and external stimuli—such as light irradiation—on the dynamics of interfacial species. These in situ techniques uncover changes in water orientation and coordination during critical reactions like CO₂ reduction and oxygen evolution. In alkaline environments, cations significantly influence interfacial dynamics: their hydration shells disrupt hydrogen bonding networks, modulating water adsorption, local electric fields, proton transport, and the stabilization of reaction intermediates. The creative application of advanced spectroscopic techniques to evaluate the effects of electrolytes, applied potentials, and/or irradiation on water structure provides novel insights that are reshaping our understanding of the electrified interface.

详细了解水在电极/电解质界面的结构动力学对于破译和改善电催化剂的性能至关重要。本文综述了拉曼和傅立叶变换红外光谱在电化学条件下探测界面水的创新应用。超越传统方法，我们讨论了评估电解质成分和外部刺激（如光照射）对界面物质动力学影响的策略。这些原位技术揭示了在二氧化碳还原和氧气释放等关键反应中水的取向和配位的变化。在碱性环境中，阳离子显著影响界面动力学：它们的水合壳破坏氢键网络，调节水吸附、局部电场、质子输运和反应中间体的稳定性。先进的光谱技术创造性地应用于评估电解质、应用电位和/或辐照对水结构的影响，提供了新的见解，重塑了我们对带电界面的理解。

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