In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 27, No. 15 ( 2012-08-14), p. 2000-2008
Abstract:
The compilation of measured effective rate constants for oxygen surface exchange on mixed conducting perovskites, which covers a great variety of compositions ranging from (La,Sr)MnO 3−δ to (La,Sr)(Co,Fe)O 3−δ and (Ba,Sr)(Co,Fe)O 3−δ , demonstrates the importance of ionic conductivity—i.e., high oxygen vacancy concentration as well as vacancy mobility—as a key factor for the surface oxygen exchange rate. This interpretation is corroborated by ab initio calculations, which indicate that the approach of an oxygen vacancy to oxygen intermediates adsorbed on the surface is the rate determining step for a number of perovskites.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/jmr.2012.186
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2012
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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