The effect of the thermal treatment on the decomposition and catalytic properties of pure and doped cobalt oxide

Abstract

The influence of Zr⁴⁺-doping on the thermal decomposition of cobalt carbonate has been studied using DTA and TG techniques. Zr⁴⁺-doping slightly retards the decomposition of CoCO₃ and increases the thermal stability of Co₃O₄. The textural characteristics, i.e., the specific surface area, the total pore volume and the mean pore radius have been determined from nitrogen adsorption isotherms measured at -196ᵒC. The results obtained indicate that the textural properties of pure cobalt oxide are influenced by doping with Zr⁴⁺ in the temperature range studied. The rate of catalytic decomposition of H₂O₂ changes with both the doping percentage and dehydration temperatures of pure and doped cobalt oxide samples.