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

Abstract

Method of coprecipitation with a subsequent thermal treatment was used to synthesize highly dispersed Mn₂O₃-Bi₂O₃-ZrO₂-CeO₂ 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 (Bi³⁺, Nd³⁺, Sn³⁺, Gd³⁺) affects the catalytic activity of the materials. The highest catalytic activity was observed for the Gd_0.05Bi_0.05Zr_0.18Ce_0.72O₂ sample.