Gd Zr Ti Ce1–––O2 mesoporous catalysts for oxidation reactions

GdxZryTizCe1–x–y–zO2 solid solutions with a crystallite size of 5–10 nm have been prepared by the sonochemical method from inorganic salts. Ceria-based materials exhibited a mesoporous structure with diameter of 2–10 nm. The activity of the solid solution in the oxidation of carbon monoxide is determined by the flow method within a temperature range of 20–500 °C at atmospheric pressure for the following gas mixture composition, vol.%: CO – 4.2; O2 – 9.6; N2 – balance or CO – 1.8; CH4 – 1.6; O2 – 9.6; N2 – balance. It was shown that the temperature of full conversion of CO was 250–270 °C for CO–O2–N2 mixture and 380–420 °C for CO–CH4–O2–N2 mixture without methane oxidation.