Measurement of potential of zero charge at a renewable pencil electrode

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2025-01-15 DOI:10.1016/j.jelechem.2024.118853

Hirosuke Tatsumi, Yusuke Kumano , Fumiki Takahashi, Jiye Jin

引用次数: 0

Abstract

Potential of zero charge (PZC) was studied by using a renewable pencil lead electrode. A cutting device for the pencil electrode enabled clear observation of the direction of charging current, providing accurate values of PZC. The PZCs of the pencil electrode in aqueous solutions with nine different electrolytes at various concentrations were measured. The positive and negative shifts of the PZC upon the increase of electrolyte concentrations were observed for hydrophobic cations and anions, respectively, suggesting the presence of specific adsorption of the ions onto the electrode surface. An approximately linear relationship was found between the degree of the PZC shift (the Esin–Markov coefficient) and the hydrophobicity parameter of ion (the standard Gibbs energy of transfer of ion at nitrobenzene | water interface), whereas Cs⁺ ion gave practically no shift of PZC in spite of the moderate hydrophobicity.

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.