• EXAFS investigations of Ni/γ-Al2O3 and Ni/AlPO4 catalysts and their precursors

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      https://www.ias.ac.in/article/fulltext/jcsc/108/01/0027-0037

    • Keywords

       

      Ni/γ-Al2O3; Ni/AlPO4; NiAl2O4; EXAFS

    • Abstract

       

      In-situ EXAFS investigations have been carried out on Ni/γ-Al2O3 catalysts with different metal loadings and prepared from different precursors. When the calcined precursors are reduced in hydrogen, the proportion of nickel metal formed varies with the nature of the precursor employed; NiAl2O4 is the unreduced product. The metal loading does not have any significant effect on the proportion of metal formed except in the case of the catalyst prepared by wetimpregnation, where appreciable metal is obtained only when the loading is greater than 10 wt%. Ni/AlPO4 catalysts do not show the formation of NiAl2O4 and reduction to metal is complate, unlike with the Ni/γ-Al2O3 catalysts which show only partial reduction to metal.

    • Author Affiliations

       

      T Arunarkavalli1

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

       
  • Journal of Chemical Sciences | News

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