Jump to main content
Jump to site search

Issue 4, 2002
Previous Article Next Article

Author affiliations

Abstract

Pd L-edge XANES and Pd K-edge XANES/EXAFS have been studied to investigate the electronic configuration and local structure of Pd in a new perovskite LaPdO3, which was prepared under high pressure. A white line in the Pd L-edge XANES for LaPdO3 is positioned just in the middle of those for divalent (PdIIO) and tetravalent (Zn2PdIVO4) palladates. The peak intensity for LaPdO3 is also in-between those for PdO and Zn2PdO4. Pd K-edge XANES spectra for PdO is characterized by a shoulder in the threshold edge due to the planar square coordination of Pd. The absence of such a shoulder in Pd K-edge XANES spectra for LaPdO3 and Zn2PdIVO4 suggests a nearly regular octahedral symmetry of (PdO6) in both structures. These XANES results underline that the palladium ions with an oxidation state of III are stabilized with the electronic configuration, t2g6σ*1 in LaPdO3. The Pd K-edge EXAFS analysis confirms that (PdO6) octahedra in LaPdO3 are nearly isotropic and the average PdIII–O bond distance is 2.064 Å, which is compatible with the average PdIII–F bond distance (2.00 Å) estimated from a recent EXAFS study on trivalent palladium fluoride.

Graphical abstract: X-Ray absorption spectroscopic study on LaPdO3

Back to tab navigation

Article information


Submitted
26 Jul 2001
Accepted
11 Jan 2002
First published
07 Feb 2002

J. Mater. Chem., 2002,12, 995-1000
Article type
Paper

X-Ray absorption spectroscopic study on LaPdO3

S. Kim, S. Lemaux, G. Demazeau, J. Kim and J. Choy, J. Mater. Chem., 2002, 12, 995 DOI: 10.1039/B106795H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Search articles by author

Spotlight

Advertisements