Electrochemical Behaviour of Urea at Pt(111) Single-Crystal Surface in 0.1 M NaOH

Boguslaw Pierozynski

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Electrochemical Behaviour of Urea at Pt(111) Single-Crystal Surface in 0.1 M NaOH

机译：尿素在0.1M NaOH中的Pt（111）单晶表面的电化学行为

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摘要

The present paper reports cyclic voltammetry and alternating current (a.c.) impedance spectroscopic study on electrosorption of urea (U) in 0.1 M NaOH electrolytic medium, carried out at Pt(111) single-crystal surface, which is the only low-index Miller plane, where potential ranges for adsorption of H and OH species in alkaline medium are widely separated by the potential range for double-layer charging. Revealed electrochemical behaviour of U at the (111) plane is evaluated through the analysis of a.c. impedance-derived kinetic parameters. The above is supplemented with the discussion of possible involvement of the so-called ion-pairing interactions between chemisorbed U and OH− electrolyte species, as compared with the behaviour previously reported at Pt for guanidine and N,N-dimethylguanidine (DMG), i.e. two structure-related molecules to U, examined both in acidic and alkaline media.

机译：本文报道了在唯一的低折射率Miller平面Pt（111）单晶表面上进行的尿素（U）在0.1M NaOH电解质介质中的电吸附的循环伏安法和交流（ac）阻抗谱研究。，其中碱性介质中H和OH物种吸附的电位范围被双层充电的电位范围广泛分隔。通过对a.c.的分析来评估U在（111）面上显示的电化学行为。阻抗衍生的动力学参数。与先前在Pt报道的胍和N，N-二甲基胍（DMG）的行为相比，以上补充了关于化学吸附的U和OH-电解质物质之间可能涉及所谓的离子对相互作用的讨论。在酸性和碱性介质中均检测到两个与U有关的结构相关分子。

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来源
《Electrocatalysis》 |2013年第1期|37-41|共5页
作者
Boguslaw Pierozynski;
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作者单位

Department of Chemistry Faculty of Environmental Management and Agriculture University of Warmia and Mazury in Olsztyn">(1);

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原文格式 PDF
正文语种 eng
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关键词
Urea (U); Guanidonium cation (G+); Pt(111); Impedance spectroscopy;

机译：尿素（U）;胍盐阳离子（G +）;铂（111）;阻抗谱;

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1. Electrochemical Behaviour of Urea at Pt(111) Single-Crystal Surface in 0.1 M NaOH [J] . Boguslaw Pierozynski Electrocatalysis . 2013,第1期

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Electrochemical Behaviour of Urea at Pt(111) Single-Crystal Surface in 0.1 M NaOH

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