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Strong metal-support interaction in Ni/TiO2 catalysts: in situ EXAFS and related studies

Arunarkavalli, T and Kulkarni, GU and Sankar, G and Rao , CNR (1993) Strong metal-support interaction in Ni/TiO2 catalysts: in situ EXAFS and related studies. In: Catalysis Letters, 17 (1-2). pp. 29-37.

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Abstract

In situ EXAFS and X-ray diffraction investigations of Ni/TiO2 catalysts show that NiTiO3 is formed as an intermediate during calcination of catalyst precursors prepared by the wet-impregnation method; the intermediate is not formed when ion-exchange method is used for the preparation. On hydrogen reduction, NiTiO3 gives rise to Ni particles dispersed in the TiO2(rutile) matrix. The occurrence of the anatase-rutile transformation of the TiO2 support, the formation and subsequent decomposition/reduction of NiTiO3 as well as the unique interface properties of the Ni particles are all factors of importance in giving rise to metal-support interaction. Active TiO2(anatase) prepared from gel route gives an additional species involving Ni3+.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Keywords: strong metal;support interaction;Ni/TiO2 catalyst;EXAFS of catalysts
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Others
Date Deposited: 28 Feb 2011 07:28
Last Modified: 09 Dec 2011 11:58
URI: http://eprints.iisc.ernet.in/id/eprint/35768

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