期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 66, 期 2-4, 页码 322-328出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2004.07.016
关键词
work function; charge transfer; zirconia; surface-sensitive electron probe; high-temperature Kelvin probe; oxygen-zirconia interface
The present work describes application of the high-temperature Kelvin probe for in situ monitoring of the charge transfer at the gas/solid interface at elevated temperatures (up to 1200 K) using work function measurements. Performance of the probe is described for the oxygen/zirconia system at elevated temperatures. The work function data for yttria-stabilized (10 mol%) zirconia during oxidation in the temperature range 298-1173 K are reported. The determined work function changes during oxidation are considered in terms of the reactivity mechanisms between oxygen and zirconia, such as oxygen incorporation and oxygen chemisorption. The effect of temperature on the oxygen chemisorption isobar is considered in terms of surface coverage of zirconia with chemisorbed oxygen species, including singly ionized atomic species and singly ionized molecular species. The respective chemisorption isobars, determined at p(O(2)) = 21 kPa, exhibit maxima at similar to 300 and 1000 K. (c) 2004 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据