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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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
|Date Deposited:||28 Feb 2011 07:28|
|Last Modified:||09 Dec 2011 11:58|
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