Evidence for the instability of surface oxygen at the Zn(0001)-O-Cu interface from core-level and X-ray induced Auger spectroscopies

被引：14

作者：

Carley, AF

Roberts, MW

机构：

[1] Department of Chemistry, University of Wales

来源：

TOPICS IN CATALYSIS | 1996年 / 3卷 / 1-2期

关键词：

zinc; copper; oxygen transients; XPS; brass formation;

D O I：

10.1007/BF02431179

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

By monitoring the O(1s) and Zn(LMM) Auger spectra it has been shown that the deposition of copper atoms at a Zn(0001)-O overlayer results in the desorption of oxygen with simultaneous reduction of Zn2+ to Zn-0 at 300 K. The surface concentrations of oxygen and copper adatoms are calculated from the O(1s) and Cu(2p) intensities while the X-ray induced Auger Zn(LMM) transition provides evidence for Zn2+ and its reduction to Zn-0. The driving force for oxygen desorption is suggested to arise from the formation of a copper-zinc intermetallic brass-like overlayer which has little affinity for oxygen.

引用

页码：91 / 102

页数：12