Interaction between water/hydrogen and oxide ceramics

被引：30

作者：

Sakai, N ^{[1
]}

Yamaji, K ^{[1
]}

Negishi, H ^{[1
]}

Horita, T ^{[1
]}

Yokokawa, H ^{[1
]}

Xiong, YP ^{[1
]}

Phillipps, MB ^{[1
]}

机构：

[1] Natl Inst Mat & Chem Res, NIMC, Tsukuba, Ibaraki 3058565, Japan

来源：

ELECTROCHEMISTRY | 2000年 / 68卷 / 06期

关键词：

water; YSZ; SIMS; surface reaction;

D O I：

10.5796/electrochemistry.68.499

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A significant interaction was observed between water vapor and ionic or mixed conducting oxides as that found in proton conducting ceramics. For the case of yttrium substituted zirconium oxide (YSZ), the oxygen exchange on the surface is found to be governed by the interaction of water molecule and oxygen vacancy of YSZ in a humid atmosphere. This reaction rate was found to be much faster than the reaction between oxygen gas and vacancy, which was observed as very large values of rate constant for oxygen tracer exchange reaction on YSZ in (H2O)-O-18 + O-18(2) atmospheres at T = 773 K. The interfacial resistance of platinum electrode/YSZ electrolyte significantly decreased in humid atmospheres at T = 761 K.

引用

页码：499 / 503

页数：5

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