IMPORTANCE OF THE SURFACE EXCHANGE KINETICS AS RATE-LIMITING STEP IN OXYGEN PERMEATION THROUGH MIXED-CONDUCTING OXIDES

被引：428

作者：

BOUWMEESTER, HJM

KRUIDHOF, H

BURGGRAAF, AJ

机构：

[1] Laboratory for Inorganic Chemistry, Materials Science and Catalysis, Department of Chemical Technology, 7500 AE Enschede

来源：

SOLID STATE IONICS | 1994年 / 72卷 / pt 2期

关键词：

D O I：

10.1016/0167-2738(94)90145-7

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：

Attention is drawn to the possible involvement of the surface exchange kinetics in limiting the rate of oxygen permeation through mixed-conducting oxide ceramics. A theoretical approach is provided with which it is possible to distinguish between surface exchange- and bulk diffusion controlled kinetics of oxygen permeation. New results on the oxygen permeability of perovskites La0.8Sr0.2CoO3-delta and SrCo0.8Fe0.2O3-delta are presented. The importance of the exchange reaction relative to diffusion in limiting overall oxygen transport through (La,Sr) (Co,Fe)O-3-delta perovskite-type oxides is emphasized.

引用

页码：185 / 194

页数：10

共 38 条

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