Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522 Japan.
Langmuir. 2011 Apr 5;27(7):4236-42. doi: 10.1021/la200199b. Epub 2011 Mar 7.
Real surface structures of the high-index planes of Pt with three atomic rows of terraces (Pt(331) = 3(111)-(111) and Pt(511) = 3(100)-(111)) have been determined in 0.1 M HClO(4) at 0.1 and 0.5 V(RHE) with the use of surface X-ray scattering (SXS). The surfaces with two atomic rows of terraces, Pt(110) = 2(111)-(111) and Pt(311) = 2(100)-(111) = 2(111)-(100), are reconstructed to a (1 × 2) structure according to previous studies. However, the surfaces with three atomic rows of terraces have pseudo-(1 × 1) structures. The interlayer spacing between the first and the second layers, d(12), is expanded 13% on Pt(331) compared to that of the bulk, whereas it is contracted 37% on Pt(511). The surface structures do not depend on the applied potential on either surface.
在 0.1 M HClO4 中，使用表面 X 射线散射 (SXS)，在 0.1 和 0.5 V(RHE)下，确定了具有三个原子层平台的 Pt 的高指数平面的真实表面结构 (Pt(331) = 3(111)-(111)和 Pt(511) = 3(100)-(111))。根据先前的研究，具有两个原子层平台的表面 Pt(110) = 2(111)-(111)和 Pt(311) = 2(100)-(111) = 2(111)-(100)重构为 (1 × 2) 结构。然而，具有三个原子层平台的表面具有伪 (1 × 1) 结构。与体相相比，在 Pt(331)上第一层和第二层之间的层间距 d(12)扩展了 13%，而在 Pt(511)上收缩了 37%。两种表面的表面结构都不依赖于施加的电位。
