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首页> 外文期刊>Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry >Studying the binding of Cd2+ by omega-mercaptoalkanoic acid self assembled monolayers by cyclic voltammetry and scanning electrochemical microscopy (SECM)
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Studying the binding of Cd2+ by omega-mercaptoalkanoic acid self assembled monolayers by cyclic voltammetry and scanning electrochemical microscopy (SECM)

机译：通过循环伏安法和扫描电化学显微镜（SECM）研究ω-巯基链烷酸自组装单层对Cd2 +的结合

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摘要

Cyclic voltammetry (CV) and scanning electrochemical microscopy (SECM) have been used for studying the binding of protons and cadmium(II) ions by 8-mercaptooctanoic acid monolayer that was assembled on an Au surface, Binding of the cations by the monolayer affected the kinetics of electron transfer to negatively charged species. i.e.. IrCl63 , in the solution. Increasing the pH of the solution causes the CV of IrCl63 to become less reversible and the feedback current of the SECM to decrease its the distance between the microelectrode and the surface decreases. On the other hand. addition of Cd2+ to the solution at pH 6.8 increases the CV reversibility and the feedback current of the SECM as a result of neutralizing the negative charge of the monolayer by the metallic ions. A model based on the Frumkin correction Was used to account for these findings and for extracting the heterogeneous association constant of Cd2+ by the monolayer. (c) 2005 Elsevier B.V. All rights reserved.
机译：循环伏安法（CV）和扫描电化学显微镜（SECM）已用于研究质子和镉（II）离子与组装在Au表面的8-巯基辛酸单层的结合，阳离子与单层的结合影响了电子转移到带负电物质的动力学。即溶液中的IrCl63。增加溶液的pH值会导致IrCl63的CV变得不可逆，并且SECM的反馈电流会减小其在微电极和表面之间的距离。另一方面。在pH 6.8的溶液中添加Cd2 +可以提高CV可逆性和SECM的反馈电流，这是由于金属离子中和了单层负电荷的结果。使用基于Frumkin校正的模型来解释这些发现，并通过单层提取Cd2 +的异质缔合常数。 （c）2005 Elsevier B.V.保留所有权利。

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