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STRONG METAL SUPPORT INTERACTION IN NI/TIO2 CATALYSTS - INSITU EXAFS AND RELATED STUDIES

ARUNARKAVALLI, T; KULKARNI, GU; SANKAR, G; RAO, CNR; (1993) STRONG METAL SUPPORT INTERACTION IN NI/TIO2 CATALYSTS - INSITU EXAFS AND RELATED STUDIES. CATAL LETT , 17 (1-2) 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+.

Type:Article
Title:STRONG METAL SUPPORT INTERACTION IN NI/TIO2 CATALYSTS - INSITU EXAFS AND RELATED STUDIES
Keywords:SMSI, STRONG METAL SUPPORT INTERACTION, NI/TIO2 CATALYST, EXAFS OF CATALYSTS, TITANIA, SYSTEMS
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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