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Study of local environment of Ag in Ag/CeO2 catalyst by EXAFS

Sarode, PR and Priolkar, KR and Bera, Parthasarathi and Hegde, MS and Emura, S and Kumashiro, R (2002) Study of local environment of Ag in Ag/CeO2 catalyst by EXAFS. In: Materials Research Bulletin, 37 (9). 1679-1690 .

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Official URL: http://dx.doi.org/10.1016/S0025-5408(02)00797-3

Abstract

The combustion synthesized Ag/CeO2 catalysts have been characterized by Extended Xray Absorption Fine Structure (EXAFS) spectroscopy at the Ag K-edge. It has been found that Ag+ like species is present in 1% Ag/CeO2 catalyst, whereas mostly Ag metal clusters are found in 3% Ag/CeO2. The analysis of EXAFS spectra indicates that about one oxygen atom is coordinated to Ag central atom at a distance of 2.19 Angstrom in 1% Ag/CeO2 catalyst along with eight coordinated Ag-Ag bond at 2.86 Angstrom. The Ag-O bond is absent in 3% Ag/CeO2. (C) 2002 Elsevier Science Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: A.Inorganic compounds;B.Chemical synthesis;C.XAFS
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 28 Jul 2011 05:55
Last Modified: 28 Jul 2011 05:55
URI: http://eprints.iisc.ernet.in/id/eprint/39426

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