Universität zu Köln

Rodriguez, G. C. Mondragon, Goenuellue, Y., Ferri, Davide ORCID: 0000-0002-9354-5231, Eyssler, Arnim, Otal, Eugenio ORCID: 0000-0003-0801-854X and Saruhan, B. (2015). Phase transitions of BaTi0.9Rh0.1O3 +/-delta perovskite-type oxides under reducing environments. Mater. Res. Bull., 61. S. 130 - 136. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-4227

Full text not available from this repository.

Abstract

Perovskite-type oxides of composition BaTi0.9Rh0.1O3 +/-delta were prepared following a new chemical route that avoids the formation of hydroxyl species and precipitation, and allows the homogeneous distribution of Rh in the final mixed metal oxide. The high dispersion of Rh and the formation of the solid solution between Rh and the BaTiO3 perovskite is confirmed by means of X-ray diffraction (XRD) and extended X-ray absorption fine structure spectroscopy (EXAFS). The presence of Rh stabilized the hexagonal BaTi0.9Rh0.1O3 +/-delta phase, which decomposes into barium orthotitanate (BaTi2O4) and metallic Rh degrees in reducing environment. This phase transition starts already at 700 degrees C and is only partially completed at 900 degrees C suggesting that part of the Rh present in the perovskite lattice might not be easily reduced by hydrogen. These aspects and further open questions are discussed. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rodriguez, G. C. Mondragon UNSPECIFIED UNSPECIFIED UNSPECIFIED Goenuellue, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ferri, Davide UNSPECIFIED orcid.org/0000-0002-9354-5231 UNSPECIFIED Eyssler, Arnim UNSPECIFIED UNSPECIFIED UNSPECIFIED Otal, Eugenio UNSPECIFIED orcid.org/0000-0003-0801-854X UNSPECIFIED Saruhan, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-417764
DOI:	10.1016/j.materresbull.2014.10.007
Journal or Publication Title:	Mater. Res. Bull.
Volume:	61
Page Range:	S. 130 - 136
Date:	2015
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-4227
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SELF-REGENERATIVE FUNCTION; BARIUM TITANATE; CRYSTAL-STRUCTURE; CATALYSTS; PALLADIUM; PD; REDUCTION; OXIDATION; STATE; CO Multiple languages Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41776