Temperature effects on the atomic structure and kinetics in single crystal electrochemistry
Temperature effects on the atomic structure and kinetics in single crystal electrochemistry
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DOI：
10.1016/j.susc.2014.06.022
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发表时间：
2015-01-01
期刊：
影响因子：
1.9
通讯作者：
Lucas, Christopher A.
中科院分区：
文献类型：
--
作者：
Gruender, Yvonne;Markovic, Nenad M.;Lucas, Christopher A.
利用原位表面X射线散射（SXS）研究了在Au（111）电极上形成金属单层过程中温度对电化学界面原子结构的影响。对于Au（111）的表面重构，较高的温度增加了未重构相中的表面原子的迁移率，从而决定了重构形成期间的表面有序性。对于欠电位沉积（UPD）系统，在低温下沉积金属吸附原子的表面扩散显着减少，这导致在Cu UPD的情况下，发生在Br-改性的表面上的有序结构的挫折，并在Ag UPD过程中形成无序的Ag单层。结果表明，温度的变化影响金属吸附原子在电极表面的传质和扩散。这表明了包括温度作为研究表面结构和电化学界面反应的变量的重要性。(C)2014爱思唯尔有限公司版权所有。
The influence of temperature on the atomic structure at the electrochemical interface has been studied using in-situ surface x-ray scattering (SXS) during the formation of metal monolayers on a Au(111) electrode. For the surface reconstruction of Au(111), higher temperatures increase the mobility of surface atoms in the unreconstructed phase which then determines the surface ordering during the formation of the reconstruction. For the underpotential deposition (UPD) systems, the surface diffusion of the depositing metal adatoms is significantly reduced at low temperatures which results in the frustration of ordered structures in the case of Cu UPD, occurring on a Br-modified surface, and in the formation of a disordered Ag monolayer during Ag UPD. The results indicate that temperature changes affect the mass transport and diffusion of metal adatoms on the electrode surface. This demonstrates the importance of including temperature as a variable in studying surface structure and reactions at the electrochemical interface. (C) 2014 Elsevier B.V. All rights reserved.