Structure of Sulfur Adlayer on Cu(111) Electrode in Alkaline Solution
Structure of Sulfur Adlayer on Cu(111) Electrode in Alkaline Solution
复制标题
碱性溶液中Cu(111)电极上硫吸附层的结构
DOI：
--
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Itaya
中科院分区：
文献类型：
--
作者：
M. Sugimasa;J. Inukai;K. Itaya
采用原位扫描隧道显微镜(STM)在碱性溶液中研究了Cu(111)上硫吸附层的结构和Cu 2 S层的形成过程。原位STM揭示了双层电位区域中硫吸附层的两种不同结构，(3 X 3)R30°和(19 × 19)。在负电位下观察到的(3 × 3)R30°结构在正方向扫电位时转变为(19 × 19)。 (19 X 19) 结构由有序的三角形域组成，这些三角形域由沿该方向延伸的边界分隔开。在(19×19)的每个三角区域中，发现硫原子形成(√3 X √3)R30°结构。在 (19 X 19) 域边界的交叉点处观察到由六个硫原子组成的特征六角环。在阳极电位下，Cu(111)上外延形成Cu 2 S层，在其上观察到(√7 X √7)R19.1°结构。
The structure of sulfur adlayer and the formation process of Cu 2 S layer on Cu(111) were investigated using in situ scanning tunneling microscopy (STM) in alkaline solution. In situ STM revealed two different structures of the sulfur adlayer, (3 X 3)R30° and (19 × 19), in the double-layer potential region. The (3 × 3)R30° structure observed at negative potentials was transformed into (19 × 19) upon sweeping the potential in the positive direction. The (19 X 19) structure consisted of well-ordered triangular domains separated by boundaries running along the direction. In each triangular domain of (19 × 19), sulfur atoms were found to form a (√3 X √3)R30° structure. Characteristic hexagonal rings consisting of six sulfur atoms were observed at intersections of the domain boundaries of (19 X 19). At anodic potentials, layers of Cu 2 S were epitaxially formed on Cu(111), on which a (√7 X √7)R19.1° structure was observed.