Significant effect of water on surface reaction and related electrochemical properties of mixed conducting oxides

N. Sakai; K. Yamaji; T. Horita; H. Kishimoto; Y. P. Xiong; H. Yokokawa

doi:10.1016/j.ssi.2003.12.046

Significant effect of water on surface reaction and related electrochemical properties of mixed conducting oxides

N. Sakai^*
, K. Yamaji
, T. Horita
, H. Kishimoto
, Y. P. Xiong
, H. Yokokawa

^*Corresponding author for this work

National Institute of Advanced Industrial Science and Technology

Research output: Contribution to journal › Conference article › peer-review

48 Scopus citations

Abstract

The interaction between water vapor and fluorite-type oxide ion conductors, and its effects on surface and electrochemical properties are investigated. High deuterium ion intensity was observed for rare-earth doped ceria annealed in D₂O-containing atmospheres. It indicates that a pretty amount of deuterium is absorbed in the ceria polycrystalline. The oxygen isotope exchange rate on YSZ surface increased with water vapor pressure, indicating that the interaction between water and oxygen vacancy in YSZ is significant. The interfacial conductivity at platinum/YSZ interface in air at T=968 K was drastically improved by addition of 1 kPa of water vapor pressure. This improvement was clearly observed for YSZ electrolyte, however, only a small effect was observed for Ce_0.8Gd_0.2U_1.9.

Original language	English
Pages (from-to)	387-391
Number of pages	5
Journal	Solid State Ionics
Volume	175
Issue number	1-4
DOIs	https://doi.org/10.1016/j.ssi.2003.12.046
State	Published - 30 Nov 2004
Externally published	Yes
Event	Fourteenth International Conference on Solid State Ionics - Monterey, CA., United States Duration: 22 Jun 2003 → 27 Jun 2003

Keywords

Ceria
Diffusion
Oxygen
SIMS
Solid Oxide Fuel Cell (SOFC)
Surface reaction
Water
Zirconia

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10.1016/j.ssi.2003.12.046

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title = "Significant effect of water on surface reaction and related electrochemical properties of mixed conducting oxides",

abstract = "The interaction between water vapor and fluorite-type oxide ion conductors, and its effects on surface and electrochemical properties are investigated. High deuterium ion intensity was observed for rare-earth doped ceria annealed in D2O-containing atmospheres. It indicates that a pretty amount of deuterium is absorbed in the ceria polycrystalline. The oxygen isotope exchange rate on YSZ surface increased with water vapor pressure, indicating that the interaction between water and oxygen vacancy in YSZ is significant. The interfacial conductivity at platinum/YSZ interface in air at T=968 K was drastically improved by addition of 1 kPa of water vapor pressure. This improvement was clearly observed for YSZ electrolyte, however, only a small effect was observed for Ce0.8Gd0.2U1.9.",

keywords = "Ceria, Diffusion, Oxygen, SIMS, Solid Oxide Fuel Cell (SOFC), Surface reaction, Water, Zirconia",

author = "N. Sakai and K. Yamaji and T. Horita and H. Kishimoto and Xiong, \{Y. P.\} and H. Yokokawa",

year = "2004",

month = nov,

day = "30",

doi = "10.1016/j.ssi.2003.12.046",

language = "英语",

volume = "175",

pages = "387--391",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

number = "1-4",

note = "Fourteenth International Conference on Solid State Ionics ; Conference date: 22-06-2003 Through 27-06-2003",

}

TY - JOUR

T1 - Significant effect of water on surface reaction and related electrochemical properties of mixed conducting oxides

AU - Sakai, N.

AU - Yamaji, K.

AU - Horita, T.

AU - Kishimoto, H.

AU - Xiong, Y. P.

AU - Yokokawa, H.

PY - 2004/11/30

Y1 - 2004/11/30

N2 - The interaction between water vapor and fluorite-type oxide ion conductors, and its effects on surface and electrochemical properties are investigated. High deuterium ion intensity was observed for rare-earth doped ceria annealed in D2O-containing atmospheres. It indicates that a pretty amount of deuterium is absorbed in the ceria polycrystalline. The oxygen isotope exchange rate on YSZ surface increased with water vapor pressure, indicating that the interaction between water and oxygen vacancy in YSZ is significant. The interfacial conductivity at platinum/YSZ interface in air at T=968 K was drastically improved by addition of 1 kPa of water vapor pressure. This improvement was clearly observed for YSZ electrolyte, however, only a small effect was observed for Ce0.8Gd0.2U1.9.

AB - The interaction between water vapor and fluorite-type oxide ion conductors, and its effects on surface and electrochemical properties are investigated. High deuterium ion intensity was observed for rare-earth doped ceria annealed in D2O-containing atmospheres. It indicates that a pretty amount of deuterium is absorbed in the ceria polycrystalline. The oxygen isotope exchange rate on YSZ surface increased with water vapor pressure, indicating that the interaction between water and oxygen vacancy in YSZ is significant. The interfacial conductivity at platinum/YSZ interface in air at T=968 K was drastically improved by addition of 1 kPa of water vapor pressure. This improvement was clearly observed for YSZ electrolyte, however, only a small effect was observed for Ce0.8Gd0.2U1.9.

KW - Ceria

KW - Diffusion

KW - Oxygen

KW - SIMS

KW - Solid Oxide Fuel Cell (SOFC)

KW - Surface reaction

KW - Water

KW - Zirconia

UR - https://www.scopus.com/pages/publications/10144226440

U2 - 10.1016/j.ssi.2003.12.046

DO - 10.1016/j.ssi.2003.12.046

M3 - 会议文章

AN - SCOPUS:10144226440

SN - 0167-2738

VL - 175

SP - 387

EP - 391

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1-4

T2 - Fourteenth International Conference on Solid State Ionics

Y2 - 22 June 2003 through 27 June 2003

ER -

Significant effect of water on surface reaction and related electrochemical properties of mixed conducting oxides

Abstract

Keywords

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