Abstract
Ce0.5Zr0.4Sn0.1O2/Al2O3 catalysts were prepared by a coprecipitation route using Ce(NH4)2(NO3)6, Zr(NO3)3·2H2O, SnCl4·5H2O and Al2O3 as the starting materials, and were evaluated as a promoter in automotive catalysis by X-ray diffraction, transmission electron microscopy and the Brunauer–Emmet–Teller (BET) technique. The oxygen storage capacity (OSC) values of the samples were measured using thermogravimetric-differential thermal analysis at 600 °C with a continuous flow of CO–N2 gas and air alternately. The CO oxidation activity of the synthesized sample was evaluated via a gas FTIR spectrometer for analysis of gas compositions. The Ce0.5Zr0.4Sn0.1O2/γ-Al2O3 composite possessed excellent thermal stability, enhanced OSC values, and high CO oxidation activity at the low temperatures even after calcination at 1000 °C for 20 h.
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