Volume : V, Issue : XI, November - 2015

Surface and catalytic properties of Li2O�doped Co�Ni�O system

Abdel Mohsen M. Turky

Abstract :

<p><p> A series of binary Co3O4–NiO with different Co3O4 contents ranging between 20–50 mol% were prepared by wet impregnation method followed by calcination at 400 and 600oC. The catalytic activity of obtained solids was checked towards gas phase oxidation of CO by oxygen. The most active system was doped with Li2O with dopant concentrations between 2– 6 mol%. The surface and catalytic properties of pure and doped solids were investigated adopting many techniques including XRD,EDX, nitrogen adsorption at –196oC and catalytic oxidation of CO at 175–225oC. The results revealed that binary Co–Ni oxides containing 33mol% Co3O4 was the most active for CO oxidation.Li2Odoping of that system, followed by calcination at 400 and 600oC markedly influenced its surface and catalytic properties. Generally, the catalytic activity of binary oxides for CO oxidation was better than that of individual NiO and was further improved upon lithia–doping. Doping process did not change in the activation energy of catalyzed reaction but rather changed the concentration of active sites involved.</p></p>

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Abdel Mohsen M.Turky / Surface and catalytic properties of Li2O�doped Co�Ni�O system / Indian Journal of Applied Research, Vol.6, Issue : 11 November 2016

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