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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Configuration and Site of 0↓(2) Adsorption on the Pt(111) Electrode Surface
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Configuration and Site of 0↓(2) Adsorption on the Pt(111) Electrode Surface

机译：P↓（111）电极表面0↓（2）吸附的构型和位置

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摘要

The inhibition of 02 reduction on a Pt(111) electrode surface with Ag adatoms has been studied to gain information on the type of O↓(2) adsorption during the reaction. A pronounced inhibition is observed upon adsorption of Ag submonolayers, and a complete inhibition is caused by underpotential deposition of a pseudomorphic Ag monotayer and of an incommensurate hexagonal bilayer. Electrochemical and in situ surface X-ray scattering techniques were used to obtain kinetic and structural data. Statistical models for the inhibition of O↓(2) reduction caused at submonolayers of Ag adatoms residing on top, bridge, and hollow sites of Pt(111) for O↓(2) adsorbed on the same type of sites in three different configurations have been compared with the experimental data. Analysis of the extent of the inhibition of O↓(2) reduction as a function of the Ag coverage shows that the data are best interpreted with O↓(2) adsorbed at a bridge site.
机译：研究了Ag吸附原子对Pt（111）电极表面O 2还原的抑制作用，以获取有关反应过程中O↓（2）吸附类型的信息。在吸附银亚单层膜时观察到明显的抑制作用，并且完全的抑制作用是由假晶态的Ag单分子膜和不相称的六角形双层膜的欠电势沉积引起的。电化学和原位表面X射线散射技术用于获得动力学和结构数据。抑制在三种不同构型下吸附在同一类型位点上的P↓（111）顶部，桥和空心位点上的Ag原子亚单分子所致的O↓（2）还原的统计模型具有以下特征：与实验数据进行了比较。根据银覆盖率对O↓（2）还原的抑制程度的分析表明，数据最好用桥位处吸附的O↓（2）来解释。

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