Current Opinion in Electrochemistry最新文献

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Impedance analysis of high-entropy alloy for ammonia synthesis 合成氨用高熵合金的阻抗分析

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-12-03 DOI: 10.1016/j.coelec.2025.101791

Daniela Silva , Paulo Molina , Luis Herrán , Diego Véliz , Magdalena Walczak , Mamié Sancy

Ammonia is gaining significant importance as a renewable energy carrier, driving global interest in sustainable production methods, such as electrochemical nitrogen or nitrate reduction. Due to the low yield in electrochemical ammonia synthesis, research on new catalyst materials, such as high-entropy alloys, has become increasingly significant, necessitating a deeper analysis of their catalytic behavior. In this context, electrochemical impedance spectroscopy is a valuable and versatile technique. This review presents a comprehensive impedance analysis of high-entropy alloys as catalysts for the electrochemical nitrogen reduction reaction and nitrogen oxoanions reduction reaction for ammonia generation at room temperature, highlighting the complexity of the system and the need for a multidisciplinary approach to understand the microstructural and electrochemical mechanisms.

氨作为一种可再生能源载体正变得越来越重要，推动了全球对可持续生产方法的兴趣，如电化学氮或硝酸盐还原。由于电化学合成氨的收率较低，对高熵合金等新型催化剂材料的研究日益重要，需要对其催化行为进行更深入的分析。在这种情况下，电化学阻抗谱是一种有价值的、通用的技术。本文综述了高熵合金作为室温下电化学氮还原反应和氮氧阴离子还原反应催化剂的阻抗分析，强调了系统的复杂性，以及需要多学科方法来理解微观结构和电化学机制。

引用次数: 0

Enhanced reversibility of zinc anode for rechargeable zinc-air batteries: A joint computational and experimental investigation 可充电锌空气电池锌阳极可逆性的增强：计算与实验联合研究

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-12-02 DOI: 10.1016/j.coelec.2025.101793

Kai Wu , Jiaqi Mao , Fanghua Ning , Xiaoyu Liu , Jin Yi

Rechargeable zinc-air batteries are promising for energy storage owing to their high theoretical energy density, reliable safety performance, and the abundance of raw materials. Nevertheless, the practical application is significantly restrained by the poor reversibility of the zinc anode, which originates from the dissolution of the Zn anode, dendrite growth with shape change, hydrogen evolution, corrosion and passivation. The electrochemical processes at the Zn anode|electrolyte interface play a vital role on the performance of the Zn anode. In this review, the mechanisms of the anode associated with its challenges are summarized individually. Moreover, the recent advances in enhancing zinc anode reversibility through computational and experimental investigations are discussed. Finally, it provides insights into the challenges and perspectives for further research, which is expected to promote the development of rechargeable ZABs.

可充电锌空气电池具有理论能量密度高、安全性能可靠、原料丰富等优点，在储能领域具有广阔的应用前景。然而，锌阳极的可逆性较差，这主要源于锌阳极的溶解、枝晶随形状变化生长、析氢、腐蚀和钝化。锌阳极|电解质界面的电化学过程对锌阳极的性能起着至关重要的作用。在这篇综述中，分别总结了阳极的机制及其挑战。此外，还讨论了通过计算和实验研究提高锌阳极可逆性的最新进展。最后，提出了进一步研究的挑战和前景，以期促进可充电ZABs的发展。

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Electrochemical impedance spectroscopy for corrosion diagnosis of reinforced concrete 电化学阻抗谱在钢筋混凝土腐蚀诊断中的应用

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-12-01 DOI: 10.1016/j.coelec.2025.101790

Christopher L. Alexander

The application of electrochemical impedance spectroscopy (EIS) to reinforced concrete with the purpose of probing the characteristic of the steel and concrete interface was first introduced in the late 1970s. The impedance response is known to be sensitive to the corrosion state of the reinforcement; however, challenges persist in accurate relation of the impedance response to physical characteristics of the system. Since the initial studies, the use of EIS has expanded beyond the lab to field structures with the desire to nondestructively assess the rate of corrosion. A review is presented on the significant advancements and contributions to the application and analysis of the impedance response of steel in concrete with a description of the remaining challenges and outlook for expanded use.

20世纪70年代末，人们首次将电化学阻抗谱（EIS）应用于钢筋混凝土中，以探测钢与混凝土界面的特性。已知阻抗响应对钢筋的腐蚀状态敏感；然而，阻抗响应与系统物理特性的精确关系仍然存在挑战。自最初的研究以来，EIS的使用已经从实验室扩展到现场结构，希望能够无损地评估腐蚀速率。回顾了混凝土中钢筋阻抗响应的应用和分析的重大进展和贡献，描述了仍然存在的挑战和扩大使用的前景。

引用次数: 0

Electrochemical impedance spectroscopy of battery systems, including sodium materials 电池系统的电化学阻抗谱，包括钠材料

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-11-30 DOI: 10.1016/j.coelec.2025.101800

Renjie Liu, Derek C. Sinclair, Anthony R. West

An overview is given of the literature on current approaches to the measurement, analysis and interpretation of broadband impedance data and examples of its application to Na materials, cells and batteries. Standard 2-terminal measurements on full cells are often complemented by both 2- and 3-terminal measurements on a range of materials and cell configurations; this should enable identification of the different impedance contributions that control full cell operation. Data analysis usually revolves around equivalent circuit modelling; strategies to identify the most appropriate circuits are reviewed, including the increasing use of the distribution of relaxation times methodology. Interfacial phenomena are fundamental components of solid electrolyte interfaces and composite electrodes in operational batteries; these are reviewed for Na-based materials and systems.

概述了目前宽带阻抗数据的测量、分析和解释方法的文献，并举例说明了其在钠材料、电池和电池中的应用。对全电池的标准2端测量通常由对一系列材料和电池配置的2端和3端测量补充；这应该能够识别控制整个电池运行的不同阻抗贡献。数据分析通常围绕等效电路建模；回顾了确定最合适电路的策略，包括越来越多地使用松弛时间分布方法。界面现象是可操作电池中固体电解质界面和复合电极的基本组成部分；对na基材料和系统进行了综述。

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Self-supported air cathode with enhanced mass transport for high-power zinc-air batteries 高功率锌-空气电池增强质量输运的自支撑空气阴极

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-11-30 DOI: 10.1016/j.coelec.2025.101792

Ran Ren, Haoyu Dong, Guanchao He, Gonglan Ye, Huilong Fei

Zinc-air batteries (ZABs) possess high theoretical energy density and are environmentally friendly. However, the practical applications of ZABs are restricted by their relatively low power density, which is largely dictated by the mass transport efficiency of the air electrode. The construction of self-supported electrodes brings about various structural advantages like large specific surface area, abundant active sites, and mechanical integrity, and it is regarded as a feasible strategy to overcome the mass transport limitation of ZABs. In this review, the recent strategies for enhancing the mass transport of self-supported air electrode are elaborated, ending with the remaining challenges along with future perspective.

锌空气电池（ZABs）理论能量密度高，环境友好。然而，ZABs的实际应用受到其相对较低的功率密度的限制，这在很大程度上取决于空气电极的质量传输效率。自支撑电极结构具有比表面积大、活性位点丰富、机械完整性等多种结构优势，被认为是克服ZABs传质限制的可行策略。在这篇综述中，阐述了近年来提高自持式空气电极质量传输的策略，最后提出了仍然存在的挑战以及未来的展望。

引用次数: 0

Distribution of relaxation times: Foundations, methods, diagnostics, and prognosis for electrochemical systems 弛豫时间分布：电化学系统的基础、方法、诊断和预测

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-11-26 DOI: 10.1016/j.coelec.2025.101789

Zilong Wang , Yuhao Wang , Francesco Ciucci

The distribution of relaxation times (DRT) has become an indispensable technique for interpreting electrochemical impedance spectroscopy. This review traces the evolution of DRT from a powerful deconvolution tool for gaining mechanistic insights into a predictive engine for diagnostics and state estimation in fields such as batteries and fuel cells. The technique’s intuitive appeal is challenged by its mathematically ill-posed nature, creating a “credibility gap” where subjective choices can yield misleading artifacts. Recent methodological advances in Bayesian and entropy-based frameworks provide greater robustness and uncertainty quantification. The path forward requires establishing a comprehensive analytical ecosystem built on community standards, benchmark datasets, and transparent reporting. This current opinion urges the community to embrace rigor and transform DRT from a specialized, expert-level tool into a reliable and reproducible cornerstone of electrochemical analysis.

弛豫时间分布（DRT）已成为解释电化学阻抗谱不可缺少的技术。本文回顾了DRT的发展历程，从一个强大的反卷积工具，用于获得对电池和燃料电池等领域诊断和状态估计的预测引擎的机制见解。该技术的直观吸引力受到其数学不适定性的挑战，造成了“可信度差距”，主观选择可能产生误导性的工件。贝叶斯和基于熵的框架的最新方法进展提供了更强的鲁棒性和不确定性量化。前进的道路需要建立一个基于社区标准、基准数据集和透明报告的综合分析生态系统。目前的观点敦促社区接受严格性，并将DRT从专业的专家级工具转变为可靠的、可重复的电化学分析基石。

引用次数: 0

Use of electrochemical impedance spectroscopy in the analysis of the oxygen evolution reaction 利用电化学阻抗谱法分析析氧反应

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-11-25 DOI: 10.1016/j.coelec.2025.101786

Svein Sunde

Recent advances in the application of electrochemical impedance spectroscopy for analysis of the oxygen evolution reaction are discussed. Impedance is used routinely to rank catalysts, to determine the electrochemically active surface area (ECSA), and for mechanistic interpretation. A significant development is attempts at assessing the ECSA from the faradaic impedance rather than from the double-layer capacitance. Impedance is also used for assessment of Tafel slopes, but for future work better integration of microkinetic models with impedance is suggested, notably through the Tafel impedance

\bar{i} Z (j ω)

讨论了电化学阻抗谱在析氧反应分析中的应用进展。阻抗通常用于对催化剂进行排序，确定电化学活性表面积（ECSA），并进行机理解释。一个重要的发展是尝试从法拉第阻抗而不是从双层电容来评估ECSA。阻抗也用于评价塔菲尔斜率，但为了将来的工作，建议更好地将微动力学模型与阻抗结合起来，特别是通过塔菲尔阻抗i¯Zjω。

引用次数: 0

Electroanalytical methods for monitoring pollutants during (photo)-(electro)-catalytic treatments of wastewater—A critical review on possible hybrid vs sequenced combinations （照片）-（电）-催化处理废水过程中监测污染物的电分析方法——对可能的混合与测序组合的重要回顾

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-11-24 DOI: 10.1016/j.coelec.2025.101787

Flamur Sopaj , Emmanuel Mousset

Electrochemical analysis of the wastewater pollutants during their degradation by electrochemical and photocatalytical techniques has been reviewed for the first time. Electroanalysis is convenient compared to chromatographic methods, due to its simplicity and cost-effectiveness, though interferences could restrict its use. The electroanalytical methods used during the degradation processes were as follows: differential pulse voltammetry (DPV), square wave voltammetry (SWV), cyclic voltammetry (CV), linear scan voltammetry, and chronoamperometry. DPV and SWV were the most used techniques due to their higher sensitivity and selectivity. Electroanalysis has been more performed during photochemical than during electrochemical treatments. In addition, the combination was mostly performed in sequence, while only few cases investigated the hybrid coupling, in which in situ analyses took place. Advantages and drawbacks of the sequenced versus hybrid system have been discussed, while more intensive studies need to performed to improve the promising possibility of the in situ combination.

本文首次综述了电化学和光催化技术降解废水污染物过程中的电化学分析。与色谱法相比，电分析法简便，成本效益高，但干扰可能会限制其使用。降解过程中采用的电分析方法有：差分脉冲伏安法（DPV）、方波伏安法（SWV）、循环伏安法（CV）、线性扫描伏安法和计时伏安法。DPV和SWV技术因其较高的灵敏度和选择性而被广泛使用。电化学分析在光化学处理中比在电化学处理中进行得更多。此外，这些组合大多是按顺序进行的，而只有少数情况调查了杂交耦合，其中进行了原位分析。已经讨论了测序与杂交系统的优缺点，但需要进行更深入的研究以提高原位组合的可能性。

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引用次数: 0

Can interpretation of electrochemical impedance spectroscopy data be automated? Where do artificial intelligence algorithms stand? 电化学阻抗谱数据的解释可以自动化吗？人工智能算法处于什么位置？

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-11-21 DOI: 10.1016/j.coelec.2025.101788

Mark E. Orazem , Burak Ulgut

While automation of data interpretation has been successful for optical spectroscopy and chromatography methods, automated interpretation of electrochemical impedance spectroscopy data is confounded by the nonuniqueness of models used to interpret the data in terms of physical quantities. Where automation has been successful, the data are compared with known libraries of high-quality, well-characterized, and specific datasets. In this manuscript, use of automation for data interpretation is reviewed, and guidelines are proposed for those seeking to develop artificial intelligence algorithms for analysis of impedance data.

虽然光学光谱和色谱方法的数据解释自动化已经取得了成功，但电化学阻抗光谱数据的自动解释却受到用于解释物理量数据的模型的非唯一性的困扰。在自动化成功的情况下，将数据与已知的高质量、具有良好特征的特定数据集库进行比较。在本文中，对数据解释自动化的使用进行了回顾，并为那些寻求开发用于分析阻抗数据的人工智能算法的人提出了指导方针。

引用次数: 0

Understanding and addressing impedance scattering in low-temperature electrolysis 理解和解决低温电解中的阻抗散射问题

IF 6.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Electrochemistry

Pub Date : 2025-11-21 DOI: 10.1016/j.coelec.2025.101785

Wenbo Shi, Wentian Cai, Yiming Zhang, Kei Ono, Jianbo Zhang

Electrochemical impedance spectroscopy (EIS) at low frequencies often suffers from scattering, a problem exacerbated in low-temperature water electrolysis. A literature-based mapping of gas-evolution electrode (GEE) spectra reveals distinct patterns: scattering occurs more frequently at high current densities, is more pronounced in alkaline water electrolysis (AWE) than in proton exchange membrane water electrolysis (PEMWE), and appears more common in potentiostatic electrochemical impedance spectroscopy (PEIS) than in galvanostatic electrochemical impedance spectroscopy (GEIS). These patterns are attributed to the increased non-stationarity in, and the functioning as a reference electrode by the bubble-evolution electrode (BEE). To reduce scattering, cell hardware with well-controlled compression is needed first to set a solid foundation. The signal-to-noise ratio of the spectra can be improved based on the nature of the noise and the cause of the scattering. A three-electrode configuration is recommended. Scattering that persists despite signal integration may indicate a resonance between the alternating current (AC) perturbation and bubble dynamics.

电化学阻抗谱（EIS）在低频时存在散射问题，低温电解过程中这一问题更加严重。基于文献的气析电极（GEE）谱图揭示了不同的模式：散射在高电流密度下更频繁地发生，在碱性电解（AWE）中比在质子交换膜电解（PEMWE）中更明显，在恒电位电化学阻抗谱（PEIS）中比在恒流电化学阻抗谱（GEIS）中更常见。这些模式归因于增加的非平稳性，以及气泡演化电极（BEE）作为参考电极的功能。为了减少散射，首先需要具有良好控制压缩的单元硬件来建立坚实的基础。根据噪声的性质和散射的原因，可以提高光谱的信噪比。建议采用三电极配置。尽管信号整合，散射仍然存在，这可能表明交流（AC）扰动和气泡动力学之间的共振。

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