Catalytic Activity of Highly Dispersed Mn2O3-Bi2O3-ZrO2-CeO2 Solid Solutions (M = Nd, Sm, Gd) in the Reaction of Carbon Monoxide Oxidation

Method of coprecipitation with a subsequent thermal treatment was used to synthesize highly dispersed Mn 2 O 3 -Bi 2 O 3 -ZrO 2 -CeO 2 solid solutions. The elemental and phase compositions, texture characteristics, dispersity, and morphology were examined. The thus synthesized samples exhibit a high activity in the reaction of CO oxidation. It was shown that the nature of doping ions (Bi 3+ , Nd 3+ , Sn 3+ , Gd 3+ ) affects the catalytic activity of the materials. The highest catalytic activity was observed for the Gd 0.05 Bi 0.05 Zr 0.18 Ce 0.72 O 2 sample.