Electroreduction of oxygen on octadecylmercaptan self-assembled monolayers
Electroreduction of oxygen on octadecylmercaptan self-assembled monolayers
复制标题
十八烷基硫醇自组装单分子层上氧的电还原
DOI：
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发表时间：
1995
影响因子：
4.3
通讯作者：
M. Stratmann
中科院分区：
文献类型：
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作者：
E. Vago;K. Weldige;M. Rohwerder;M. Stratmann
用旋转圆盘电极研究了在硼酸盐缓冲溶液中吸附在金衬底上的十八烷基硫醇自组装单层膜上氧的还原。发现这些单层膜对氧还原和其他电化学反应有很大的抑制作用。然而，在−0.80 Vshe极化后，薄膜对电子转移反应的保护性能丧失，并且观察到类似裸金的行为。离位XPS表明，在氧还原过程中，巯基单层未被大量解吸。提出了硫醇分子的单层结构紊乱和脱附是电化学反应易于接近表面的主要原因。
The reduction of oxygen has been studied on octadecylmercaptan self-assembled monolayers adsorbed on gold substrates in borate buffer solutions with a rotating disc electrode. A great inhibition of the oxygen reduction and other electrochemical reactions by these monolayers has been found. However, after polarisation at −0.80 Vshe the protecting properties of the film against electron transfer reactions are lost, and a behaviour similar to bare gold is observed. Ex situ XPS indicates that the thiol monolayer has not been desorbed to a large extent during oxygen reduction. Disorders of the monolayer structure and desorption of thiol molecules are proposed as the main reasons for the accessibility of electrochemical reactions to the surface.