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
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
收藏
页码:91 / 102
页数:12
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