INSITU X-RAY PHOTOELECTRON SPECTROSCOPIC STUDY OF THE REVERSIBLE PHASE-TRANSITION BETWEEN COO AND CO3O4 IN OXYGEN OF 10-3 PA

被引：170

作者：

OKU, M

SATO, Y

机构：

[1] Institute for Materials Research, Tohoku University, Sendai

来源：

APPLIED SURFACE SCIENCE | 1992年 / 55卷 / 01期

关键词：

D O I：

10.1016/0169-4332(92)90378-B

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：

The temperature dependence of the Co2p and O 1s XPS spectra for the cobalt-oxygen system was studied in an oxygen atmosphere of 1 x 10(-3) Pa. The reversible transition between CoO and Co3O4 was observed between 373 and 973 K. Although bulk thermodynamics predicts a transition temperature of 806 K, the transition occurred at about 620 K. This means that surface compositions or phases of the Co-O system are ruled by surface thermodynamics different from that of the bulk.

引用

页码：37 / 41

页数：5

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