Desorption of Spontaneously Adsorbed and Electrochemically Readsorbed 2-Mercaptoethanesulfonate on Au(111)
Desorption of Spontaneously Adsorbed and Electrochemically Readsorbed 2-Mercaptoethanesulfonate on Au(111)
复制标题
Au(111) 上自发吸附和电化学再吸附 2-巯基乙磺酸盐的解吸
作者：
J. Calvente;Z. Kováčová;M. Sánchez;and Rafael Andreu;W. Fawcett
本文用电位阶跃和伏安法研究了2-巯基乙磺酸（MES）在Au（111）表面的自发脱附。从氧化扫描过程中形成的氧化金的量在指纹区域中，它示出的吸附过程诱导的金表面的结构变化。它还表明，与MES离子的还原解吸伴随法拉第过程发生。结果表明，这一过程是连接到结构修饰的金电极上的溶剂的还原。MES的还原解吸过程中经历了更负的电位，其特征在于由一个单一的峰在伏安响应和最大的计时电流图中的存在。结果表明，最大电流的对数、最大电流出现的时间和半峰宽与电位呈线性关系。一个实验方案的解吸/再吸附MES的基础上潜在的…
The desorption of 2-mercaptoethanesulfonate (MES) spontaneously adsorbed on Au(111) has been studied by using both potential-step and voltammetric experiments. From the amount of gold oxide formed during the oxidation sweep in the fingerprint region it is shown that the adsorption process induces structural changes of the gold surface. It is also shown that together with the reductive desorption of MES ions a concomitant faradaic process occurs. The results suggest that this process is connected to the reduction of solvent on the structurally modified gold electrode. The reductive desorption process of MES undergone at more negative potentials is characterized by a single peak in the voltammetric response and the presence of a maximum in the chronoamperogram. It is shown that the logarithm of the maximum current, the time at which the maximum current appears, and the peak width at half height depend linearly on potential. An experimental protocol for the desorption/readsorption of MES based on a potential...