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In situ structural study on underpotential deposition of Ag on Au(111) electrode using surface X-ray scattering technique

机译:表面X射线散射技术研究Ag在Au(111)电极上的电位沉积的原位结构研究。

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摘要

In situ surface X-ray scattering (SXS) measurements were carried out to study the structure of a Ag layer on a Au(111) electrode formed by underpotential deposition (upd) in sulfuric acid solution. Specular rod profiles showed that a monolayer of Ag was formed at a potential between the second and third upd peaks, and a bilayer of Ag was formed at a potential between the third upd peak and bulk deposition. Non-specular rod profiles demonstrated that electrochemically deposited Ag atoms both in the first and second layers were situated at the threefold hollow cubic closest packing (ccp) site of the underlying Au and Ag layers, respectively.
机译:进行了原位表面X射线散射(SXS)测量,以研究在硫酸溶液中通过欠电位沉积(upd)形成的Au(111)电极上的Ag层的结构。镜面杆的轮廓表明,在第二和第三上升峰之间的电势处形成了一个Ag单层,而在第三上升峰和整体沉积之间的电势处形成了一个Ag双层。非镜面杆轮​​廓表明,在第一层和第二层中电化学沉积的Ag原子分别位于下面的Au和Ag层的三重空心立方最近堆积(ccp)位置。

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