Lucas Christopher A, Thompson Paul, Cormack Michael, Brownrigg Alexander, Fowler Ben, Strmcnik Dusan, Stamenkovic Vojislav, Greeley Jeff, Menzel Andreas, You Hoydoo, Marković Nenad M
Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool, L69 7ZE, United Kingdom.
J Am Chem Soc. 2009 Jun 10;131(22):7654-61. doi: 10.1021/ja9014666.
The influence of temperature changes in water-based electrolytes on the atomic structure at the electrochemical interface has been studied using in situ surface X-ray scattering (SXS) in combination with cyclic voltammetry. Results are presented for the potential-dependent surface reconstruction of Au(100), the adsorption and ordering of bromide anions on the Au(100) surface, and the adsorption and oxidation of CO on Pt(111) in pure HClO(4) and in the presence of anions. These systems represent a range of structural phenomena, namely metal surface restructuring and ordering transitions in both nonreactive spectator species and reactive adsorbate layers. The key effect of temperature appears to be in controlling the kinetics of the surface reactions that involve oxygenated species, such as hydroxyl adsorption and oxide formation. The results indicate that temperature effects should be considered in the determination of structure-function relationships in many important electrochemical systems.
利用原位表面X射线散射（SXS）结合循环伏安法，研究了水基电解质中的温度变化对电化学界面原子结构的影响。给出了Au(100)的电位依赖表面重构、溴离子在Au(100)表面的吸附和有序排列，以及在纯HClO(4)和存在阴离子的情况下CO在Pt(111)上的吸附和氧化的结果。这些体系代表了一系列结构现象，即非反应性旁观物种和反应性吸附层中的金属表面重构和有序转变。温度的关键作用似乎在于控制涉及含氧物种的表面反应动力学，如羟基吸附和氧化物形成。结果表明，在确定许多重要电化学体系的结构-功能关系时，应考虑温度效应。
