Reproducibility of Electrochemical Measurements with Ionic Liquids: Role of Supplied Batches, Water and Adventitious Oxygen

IF 3 3区化学 Q2 CHEMISTRY, APPLIED

Topics in Catalysis Pub Date : 2025-09-12 DOI:10.1007/s11244-025-02123-x

Maren-Kathrin Heubach, Fabian M. Schuett, Jerome Mayer, Omar W. Elkhafif, Albert K. Engstfeld, Timo Jacob

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引用次数: 0

Abstract

Studying the potential dependent interaction of non-aqueous electrolytes, such as ionic liquids (ILs), with model electrode surfaces plays a crucial role not only in the field of battery-related research. These electrolytes bear the advantage that their electrochemical stability windows often exceed that of water. However, comparing results using ILs as electrolytes reported in the literature reveals strong discrepancies in the reproducibility of the data. In this study, we show that parameters such as the supplier, the supplied batch, and the purification steps can have a huge impact on the electrochemical properties. As a reference system, these properties are studied by cyclic voltammetry on a Au(111) single crystal electrode in N-methyl-N-propylpiperidinium bis(trifluoromethane)sulfonimide ([MPPip][TFSI]). Analysing the different features observed in the cyclic voltammograms, we were to some extent able to deconvolute the features that are related to the interaction of ILs with the substrate and impurities added from the pretreatment due to the influence of residual water and oxygen.

Graphical Abstract

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离子液体电化学测量的再现性：供试批、水和非定式氧的作用

研究非水电解质（如离子液体）与模型电极表面的电位依赖相互作用不仅在电池相关研究领域具有重要作用。这些电解质的优点是它们的电化学稳定窗口通常超过水。然而，比较文献中报道的使用il作为电解质的结果显示，数据的可重复性存在很大差异。在这项研究中，我们发现供应商、供应批次和净化步骤等参数对电化学性能有很大的影响。以Au（111）单晶电极为参比体系，在n -甲基- n -丙基哌啶双（三氟甲烷）磺酰亚胺（[MPPip][TFSI]）中，用循环伏安法研究了这些性质。分析在循环伏安图中观察到的不同特征，我们在一定程度上能够解卷积与il与底物相互作用以及由于残余水和氧的影响而从预处理中添加的杂质有关的特征。图形抽象

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来源期刊

Topics in Catalysis 化学-物理化学

CiteScore

5.70

自引率

5.60%

发文量

197

审稿时长

2 months

期刊介绍： Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.