Oxygen storage properties and catalytic activity of layer-ordered perovskites BaY1 - XGdxMn2O5 + δ

Alicja Klimkowicz, K. Świerczek, T. Rzasa, Akito Takasaki, B. Dabrowski

研究成果: Article

6 引用 (Scopus)

抄録

Crystal structure, oxygen storage-related and preliminary anaerobic methane combustion studies were conducted for BaY1 - xGdxMn2O5 + δ (0, 0.25, 0.5, 0.75 and 1) series of oxides prepared by a sol-gel method. All samples were found to possess layered-type A-site cation ordering, with the unit cell volume linearly dependent on the average radius of Y1 - xGdx for both the reduced and the oxidized materials. The oxygen content in the temperature range of 400°C-600°C indicates change on the order of 1 atomic mole, occurring when the sample's surrounding atmosphere was changed from air to 5 vol.% H2 in Ar. The time dependence of the reduction shows activated character on temperature, with an activation energy, which seems to be related to the oxygen diffusion in the bulk of the materials. Initial data concerning methane combustion in oxygen-free conditions show promising catalytic activity of BaYMn2O6 at elevated temperatures.

元の言語English
ページ(範囲)43-47
ページ数5
ジャーナルSolid State Ionics
288
DOI
出版物ステータスPublished - 2016 5 1

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perovskites
catalytic activity
Catalyst activity
Oxygen
Methane
oxygen
methane
Temperature
Oxides
Sol-gel process
time dependence
temperature
Cations
Activation energy
Crystal structure
Positive ions
gels
activation energy
cations
atmospheres

ASJC Scopus subject areas

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

これを引用

Oxygen storage properties and catalytic activity of layer-ordered perovskites BaY1 - XGdxMn2O5 + δ . / Klimkowicz, Alicja; Świerczek, K.; Rzasa, T.; Takasaki, Akito; Dabrowski, B.

:: Solid State Ionics, 巻 288, 01.05.2016, p. 43-47.

研究成果: Article

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abstract = "Crystal structure, oxygen storage-related and preliminary anaerobic methane combustion studies were conducted for BaY1 - xGdxMn2O5 + δ (0, 0.25, 0.5, 0.75 and 1) series of oxides prepared by a sol-gel method. All samples were found to possess layered-type A-site cation ordering, with the unit cell volume linearly dependent on the average radius of Y1 - xGdx for both the reduced and the oxidized materials. The oxygen content in the temperature range of 400°C-600°C indicates change on the order of 1 atomic mole, occurring when the sample's surrounding atmosphere was changed from air to 5 vol.{\%} H2 in Ar. The time dependence of the reduction shows activated character on temperature, with an activation energy, which seems to be related to the oxygen diffusion in the bulk of the materials. Initial data concerning methane combustion in oxygen-free conditions show promising catalytic activity of BaYMn2O6 at elevated temperatures.",
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AU - Świerczek, K.

AU - Rzasa, T.

AU - Takasaki, Akito

AU - Dabrowski, B.

PY - 2016/5/1

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N2 - Crystal structure, oxygen storage-related and preliminary anaerobic methane combustion studies were conducted for BaY1 - xGdxMn2O5 + δ (0, 0.25, 0.5, 0.75 and 1) series of oxides prepared by a sol-gel method. All samples were found to possess layered-type A-site cation ordering, with the unit cell volume linearly dependent on the average radius of Y1 - xGdx for both the reduced and the oxidized materials. The oxygen content in the temperature range of 400°C-600°C indicates change on the order of 1 atomic mole, occurring when the sample's surrounding atmosphere was changed from air to 5 vol.% H2 in Ar. The time dependence of the reduction shows activated character on temperature, with an activation energy, which seems to be related to the oxygen diffusion in the bulk of the materials. Initial data concerning methane combustion in oxygen-free conditions show promising catalytic activity of BaYMn2O6 at elevated temperatures.

AB - Crystal structure, oxygen storage-related and preliminary anaerobic methane combustion studies were conducted for BaY1 - xGdxMn2O5 + δ (0, 0.25, 0.5, 0.75 and 1) series of oxides prepared by a sol-gel method. All samples were found to possess layered-type A-site cation ordering, with the unit cell volume linearly dependent on the average radius of Y1 - xGdx for both the reduced and the oxidized materials. The oxygen content in the temperature range of 400°C-600°C indicates change on the order of 1 atomic mole, occurring when the sample's surrounding atmosphere was changed from air to 5 vol.% H2 in Ar. The time dependence of the reduction shows activated character on temperature, with an activation energy, which seems to be related to the oxygen diffusion in the bulk of the materials. Initial data concerning methane combustion in oxygen-free conditions show promising catalytic activity of BaYMn2O6 at elevated temperatures.

KW - Crystal structure

KW - Flameless methane combustion

KW - Oxygen production

KW - Oxygen storage materials

KW - Perovskite oxides

KW - Thermogravimetric analysis

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