|
authors |
Boulahya, K; Gil, DM; Hassan, M; Martin, SG; Amador, U |
|
nationality |
International |
|
journal |
DALTON TRANSACTIONS |
|
keywords |
OXIDE FUEL-CELLS; ELECTRICAL-CONDUCTIVITY; K2NIF4-TYPE STRUCTURE; THERMAL-EXPANSION; CATHODE MATERIALS; OXYGEN REDUCTION; IONIC TRANSPORT; MAGNETORESISTANCE |
|
abstract |
New oxides of the (NdSr)(n+1)MO3n+1 (M = Co and Mn or Fe) series are reported. Compounds of composition NdSrCo0.75Fe0.25O4.(10), NdSrCo0.75Mn0.25O4.08 and Nd0.5Sr1.5Co0.75Mn0.25O3.86 are the n = 1 members of the Ruddlesden-Popper homologous series (K2NiF4 structural type) as determined by X-ray diffraction and different transmission electron microscopy techniques. Their crystal structure consists of connected (Co-Fe/Mn)O-6 octahedra blocks separated by (Nd/Sr) O rock-salt like layers along the c-axis. Interstitial oxygen atoms or anion vacancies are induced depending on composition. Oxides with interstitial oxygen show good performances as intermediate temperature solid oxide fuel cell (IT-SOFC) cathode. The areaspecific resistance values of electrodes made of these oxides at 973 K in air are 0.18 Omega cm(2) for NdSrCo0.75Fe0.25O4.(10) and NdSrCo0.75Mn0.25O4.08 (comparable to the one of the state-of-the-art materials proposed as cathodes in IT-SOFC), and 1.38 Omega cm(2) for Nd0.5Sr1.5Co0.75Mn0.25O3.86. |
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publisher |
ROYAL SOC CHEMISTRY |
|
issn |
1477-9226 |
|
year published |
2017 |
|
volume |
46 |
|
issue |
4 |
|
beginning page |
1283 |
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ending page |
1289 |
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digital object identifier (doi) |
10.1039/c6dt03970g |
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web of science category |
Chemistry, Inorganic & Nuclear |
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subject category |
Chemistry |
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unique article identifier |
WOS:000395373200029
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