The reduction of copper oxide by water vapor visualized by in situ UHV-TEM

被引：8

作者：

Bharadwaj, MD ^{[1
]}

Yang, JC ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Mat Sci & Engn, Pittsburgh, PA 15260 USA

来源：

SCRIPTA MATERIALIA | 2001年 / 44卷 / 11期

基金：

美国国家科学基金会;

关键词：

copper; CU2O; oxidation; in situ UHV transmission electron microscopy (TEM); water vapor;

D O I：

10.1016/S1359-6462(01)00940-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An unexpected surface phenomenon where H2O reduces Cu2O is observed, which is contrary to the bulk thermochemical data. The possible artifacts for Cu2O reduction in wet oxidizing conditions was examined, by considering electron-beam effect, carbon contamination and residual gases and conclude that it is unlikely that these play a role in the surprising reduction of copper oxide by water vapor. The interfacial and surface energies that explain the discrepancy between bulk thermochemical data and experimental observations were speculated.

引用

页码：2557 / 2561

页数：5