氧吸附对手性Pt{531}表面的影响。

Effect of oxygen adsorption on the chiral Pt{531} surface.

作者信息

Held G, Jones L B, Seddon E A, King D A

机构信息

Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.

出版信息

J Phys Chem B. 2005 Apr 7;109(13):6159-63. doi: 10.1021/jp0450484.

DOI:10.1021/jp0450484

PMID:16851681

Abstract

The adsorption of oxygen on the chiral Pt{531} surface was studied by high-resolution X-ray photoelectron spectroscopy (HRXPS) and low energy electron diffraction (LEED). After the surface is annealed in oxygen (3 x 10(-7) mbar), three O 1s peaks are observed in XPS. One peak, at 529.5 eV, is assigned to chemisorbed oxygen; it disappears after annealing in vacuo to temperatures above 900 K. The other two peaks at 530.8 and 532.3 eV are stable up to at least 1250 K. They are associated with oxide clusters on the surface. These clusters readily react with coadsorbed carbon monoxide at temperatures between 315 and 620 K.

摘要

通过高分辨率X射线光电子能谱（HRXPS）和低能电子衍射（LEED）研究了氧在手性Pt{531}表面的吸附。在氧气（3×10⁻⁷毫巴）中对表面进行退火后，在XPS中观察到三个O 1s峰。一个位于529.5 eV的峰归属于化学吸附氧；在真空中退火至高于900 K的温度后它消失。另外两个位于530.8和532.3 eV的峰在至少1250 K时都是稳定的。它们与表面上的氧化物簇相关。这些簇在315至620 K的温度下很容易与共吸附的一氧化碳发生反应。