Kinetics of Electrode Processes on Metals Coated with Hydrocarbon Films in Solutions of Electrolytes

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-01-01 DOI:10.4152/pea.2021390503

V. I. Vigdorovitch, L. Tsygankova, M. Vigdorowitsch, N. Shel, L. Knyazeva

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Abstract

Kinetics regularities of hydrogen evolution reaction (HER) on Armco iron and copper anodic ionization, covered with a hydrocarbon film based on I-20A oil with a fixed amount of gun grease of the highest quality (GGHQ), were studied at room temperature. The measurements were carried out in aqueous and methanol solutions with the electrolyte composition of x M HCl + (1 x) M LiCl and 0.1 М HCl + х М LiCl + (3.9 х) М LiClO4. The Tafel slope coefficients values, and the orders of reactions, with respect to hydrogen ions (Fe, Cu) and chloride-ions (Cu) were estimated. The effect of oxyethylated amines (OEA), introduced into the solution or hydrocarbon surface coating, on the kinetics of electrode processes, for iron and copper, has been studied. It is shown that HER mechanism on Armco iron and copper anodic ionization does not change in the presence of a hydrocarbon coating on the metal surface. Large OEA molecules freely penetrate from the solution through the hydrocarbon coating to the metal surface, changing partial electrode reactions kinetics. The results are interpreted taking into account the hydrocarbon films surface porous structure.

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金属包覆烃膜在电解质溶液中的电极过程动力学

研究了室温条件下，在I-20A油基烃膜和一定量的高质量枪炮润滑脂(GGHQ)覆盖下，铁铜阳极电离析氢反应(HER)的动力学规律。测量在水溶液和甲醇溶液中进行，电解质组成为x M HCl + (1 x) M LiCl和0.1 М HCl + М LiCl + (3.9) М LiClO4。估计了氢离子(Fe, Cu)和氯离子(Cu)的Tafel斜率系数值和反应级数。研究了氧乙基化胺(OEA)对铁和铜电极过程动力学的影响。结果表明，在金属表面有碳氢化合物涂层的情况下，铁和铜阳极电离的HER机制没有改变。大的OEA分子通过碳氢化合物涂层从溶液中自由渗透到金属表面，改变了部分电极反应动力学。考虑了碳氢化合物薄膜表面的多孔结构，对结果进行了解释。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.