SO2 FORMATION AT THE SULFUR-IRON OXIDE INTERFACE

被引：20

作者：

CABIBIL, H

KELBER, JA

机构：

[1] UNIV N TEXAS,CTR MAT CHARACTERIZAT,DENTON,TX 76203

[2] UNIV N TEXAS,DEPT CHEM,DENTON,TX 76203

来源：

SURFACE SCIENCE | 1995年 / 329卷 / 1-2期

关键词：

AUGER ELECTRON SPECTROSCOPY; CHALCOGENS; CORROSION; IRON; IRON OXIDE; METAL-OXIDE INTERFACES; OXIDATION; THERMAL DESORPTION SPECTROSCOPY;

D O I：

10.1016/0039-6028(95)00116-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report SO2 thermal desorption (amu 64) from a polycrystalline iron surface precovered with a monolayer of S and subsequently overgrown with a thin Fe oxide layer under controlled UHV conditions. The assignment of SO2 to the amu 64 peak is confirmed by cracking pattern analysis. Studies using a combination of Auger electron spectroscopy (AES) and temperature-programmed desorption (TPD) show that SO2 exhibits a maximum desorption at 500 K. Our results demonstrate S-O bond formation at the metal-oxide interface and suggest a mechanism for the S-induced oxide instability.

引用

页码：101 / 106

页数：6

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