TY - JOUR
T1 - Crystal structure and oxygen storage properties of BaLnMn2O5+δ (Ln
T2 - Pr, Nd, Sm, Gd, Dy, Er and Y) oxides
AU - Klimkowicz, Alicja
AU - ͆wierczek, Konrad
AU - Takasaki, Akito
AU - Molenda, Janina
AU - Dabrowski, Bogdan
N1 - Funding Information:
The authors (A.K., K.Ś., A.T.) acknowledge financial support from JSPS-PAN Joint Research Project “Development of IGFU System with Oxygen and Hydrogen Storage Units”.
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.
PY - 2015/5
Y1 - 2015/5
N2 - In this paper we report on crystal structure and oxygen storage properties of A-site cation ordered BaLnMn2O5+δ (Ln: Pr, Nd, Sm, Gd, Dy, Er and Y) perovskite-type oxides. The materials show practically complete and reversible change between fully reduced BaLnMn2O5 and oxidized BaLnMn2O6, which occurs at moderate temperatures (300-500 °C) during changes of the oxygen partial pressure (air, 5 vol.% H2 in Ar). Based on the thermogravimetric measurements, reversible oxygen storage capacity, characteristic temperature of oxidation and reduction, as well as kinetics of these processes are given. Structural characterization was performed at room temperature for the reduced and oxidized materials by Rietveld analysis of the XRD data. These results are accompanied by in situ high temperature XRD measurements of the oxidation process, performed for BaNdMn2O5 in air.
AB - In this paper we report on crystal structure and oxygen storage properties of A-site cation ordered BaLnMn2O5+δ (Ln: Pr, Nd, Sm, Gd, Dy, Er and Y) perovskite-type oxides. The materials show practically complete and reversible change between fully reduced BaLnMn2O5 and oxidized BaLnMn2O6, which occurs at moderate temperatures (300-500 °C) during changes of the oxygen partial pressure (air, 5 vol.% H2 in Ar). Based on the thermogravimetric measurements, reversible oxygen storage capacity, characteristic temperature of oxidation and reduction, as well as kinetics of these processes are given. Structural characterization was performed at room temperature for the reduced and oxidized materials by Rietveld analysis of the XRD data. These results are accompanied by in situ high temperature XRD measurements of the oxidation process, performed for BaNdMn2O5 in air.
KW - Crystal structure
KW - Energy storage
KW - Oxides
KW - Thermogravimetric analysis (TGA)
KW - X-ray diffraction
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U2 - 10.1016/j.materresbull.2015.01.041
DO - 10.1016/j.materresbull.2015.01.041
M3 - Article
AN - SCOPUS:84921719504
SN - 0025-5408
VL - 65
SP - 116
EP - 122
JO - Materials Research Bulletin
JF - Materials Research Bulletin
ER -