Abstract
MnO2 was prepared by a simple redox method using potassium permanganate and various Mn2+ precursors (Mn-chloride, Mn-nitrate, Mn-acetate, and Mn-sulfate) and the influence of Mn-precursors in the CO oxidation was investigated. The light-off temperatures (T50%) in the dry conditions increased as following order: Mn-chloride<Mn-nitrate<Mn acetate<Mn-sulfate. In the presence of CO2 and H2O vapor, the T50% value significantly shifted to higher temperatures compared to its value in the absence of them. MnO2 catalyst prepared from Mn-chloride exhibited a high quantity of labile oxygen and better reducibility compared with the other catalysts.
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