Defect chemistry and oxygen permeation property of Pr2Ni0.75Cu0.25O4 oxide doped with Ga

Tatsumi Ishihara; Kenichi Nakashima; Sachio Okada; Makiko Enoki; Hiroshige Matsumoto

doi:10.1016/j.ssi.2007.11.019

Defect chemistry and oxygen permeation property of Pr₂Ni_0.75Cu_0.25O₄ oxide doped with Ga

Tatsumi Ishihara, Kenichi Nakashima, Sachio Okada, Makiko Enoki, Hiroshige Matsumoto

Advanced Energy Conversion Systems Thrust

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Abstract

Mixed conductivity and oxygen permeation property in Pr₂Ni_0.75Cu_0.25Ga_0.05O₄ were investigated. After examining various Ga concentrations, it was found that cation excess composition of Pr₂Ni_0.75Cu_0.25Ga_0.05O₄ achieved the highest oxygen permeability of 298 μmol·min^{- 1}·cm^{- 2} (6.68cc·min^{- 1}·cm^{- 2}) at 1273 K from air to He with a 0.5 mm thickness. The oxygen permeability of Pr₂Ni_0.75Cu_0.25Ga_0.05O₄ increased with increasing the activity of surface catalyst and the highest permeation was achieved when La_0.9Sr_0.1Co_0.8Fe_0.2O₃ was used for the surface catalyst. The oxygen nonstoichiometry was further studied by using thermogravimetry. It was confirmed that the excess amount of oxygen was introduced at high P_O2 range, which might be the origin of the high oxygen permeation rate in this oxide.

Original language	English
Pages (from-to)	1367-1371
Number of pages	5
Journal	Solid State Ionics
Volume	179
Issue number	27-32
DOIs	https://doi.org/10.1016/j.ssi.2007.11.019
Publication status	Published - Sept 30 2008

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Defect chemistry and oxygen permeation property of Pr2Ni0.75Cu0.25O4 oxide doped with Ga",

abstract = "Mixed conductivity and oxygen permeation property in Pr2Ni0.75Cu0.25Ga0.05O4 were investigated. After examining various Ga concentrations, it was found that cation excess composition of Pr2Ni0.75Cu0.25Ga0.05O4 achieved the highest oxygen permeability of 298 μmol·min- 1·cm- 2 (6.68cc·min- 1·cm- 2) at 1273 K from air to He with a 0.5 mm thickness. The oxygen permeability of Pr2Ni0.75Cu0.25Ga0.05O4 increased with increasing the activity of surface catalyst and the highest permeation was achieved when La0.9Sr0.1Co0.8Fe0.2O3 was used for the surface catalyst. The oxygen nonstoichiometry was further studied by using thermogravimetry. It was confirmed that the excess amount of oxygen was introduced at high PO2 range, which might be the origin of the high oxygen permeation rate in this oxide.",

author = "Tatsumi Ishihara and Kenichi Nakashima and Sachio Okada and Makiko Enoki and Hiroshige Matsumoto",

year = "2008",

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language = "English",

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TY - JOUR

T1 - Defect chemistry and oxygen permeation property of Pr2Ni0.75Cu0.25O4 oxide doped with Ga

AU - Ishihara, Tatsumi

AU - Nakashima, Kenichi

AU - Okada, Sachio

AU - Enoki, Makiko

AU - Matsumoto, Hiroshige

PY - 2008/9/30

Y1 - 2008/9/30

N2 - Mixed conductivity and oxygen permeation property in Pr2Ni0.75Cu0.25Ga0.05O4 were investigated. After examining various Ga concentrations, it was found that cation excess composition of Pr2Ni0.75Cu0.25Ga0.05O4 achieved the highest oxygen permeability of 298 μmol·min- 1·cm- 2 (6.68cc·min- 1·cm- 2) at 1273 K from air to He with a 0.5 mm thickness. The oxygen permeability of Pr2Ni0.75Cu0.25Ga0.05O4 increased with increasing the activity of surface catalyst and the highest permeation was achieved when La0.9Sr0.1Co0.8Fe0.2O3 was used for the surface catalyst. The oxygen nonstoichiometry was further studied by using thermogravimetry. It was confirmed that the excess amount of oxygen was introduced at high PO2 range, which might be the origin of the high oxygen permeation rate in this oxide.

AB - Mixed conductivity and oxygen permeation property in Pr2Ni0.75Cu0.25Ga0.05O4 were investigated. After examining various Ga concentrations, it was found that cation excess composition of Pr2Ni0.75Cu0.25Ga0.05O4 achieved the highest oxygen permeability of 298 μmol·min- 1·cm- 2 (6.68cc·min- 1·cm- 2) at 1273 K from air to He with a 0.5 mm thickness. The oxygen permeability of Pr2Ni0.75Cu0.25Ga0.05O4 increased with increasing the activity of surface catalyst and the highest permeation was achieved when La0.9Sr0.1Co0.8Fe0.2O3 was used for the surface catalyst. The oxygen nonstoichiometry was further studied by using thermogravimetry. It was confirmed that the excess amount of oxygen was introduced at high PO2 range, which might be the origin of the high oxygen permeation rate in this oxide.

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DO - 10.1016/j.ssi.2007.11.019

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SN - 0167-2738

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JO - Solid State Ionics

JF - Solid State Ionics

IS - 27-32

ER -

Defect chemistry and oxygen permeation property of Pr₂Ni_0.75Cu_0.25O₄ oxide doped with Ga

Abstract

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