TY - JOUR
T1 - Oxygen storage properties and catalytic activity of layer-ordered perovskites BaY1 - XGdxMn2O5 + δ
AU - Klimkowicz, A.
AU - Świerczek, K.
AU - Rzasa, T.
AU - Takasaki, A.
AU - Dabrowski, B.
N1 - Funding Information:
Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences , under Contract No. DE-AC02-06CH11357 .
Funding Information:
The project was funded by the National Science Centre Poland (NCN) on the basis of the decision number DEC-2011/01/B/ST8/04046 .
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/5
Y1 - 2016/5
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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U2 - 10.1016/j.ssi.2016.01.038
DO - 10.1016/j.ssi.2016.01.038
M3 - Article
AN - SCOPUS:84957668427
SN - 0167-2738
VL - 288
SP - 43
EP - 47
JO - Solid State Ionics
JF - Solid State Ionics
ER -