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The mixed oxides La_ 1-x Ce_xFe_ 1-y-n Co_yRu_nO_3 were prepared by sol-gel method and used as catalysts for NO direct decomposition. The catalysts were characterized by DTA-TG, XRD, IR and BET. XRD analysis reveals that the samples are in a pure perovskite phase in 550～650 ℃, and catalyst structure keeps long else 2θ decrease, and lattice parameters enhance when Ru is introduced. The characteristic peaks of samples are stronger during a temperature increase, and the particle size grows faster. IR analysis shows that the position and shape of adsorption peaks are almost the same among all samples, but with the Ru content increasing, 600 cm~ -1 peak stretches to a high frequency and changes to disorder. The wave numbers move to low frequency when n=0.05, yet it doesn’t vary obviously when n>0.05. The BET surface area testifies that particle sizes of all catalysts increase with temperature increasing.
The mixed oxides La_ 1-x Ce_xFe_ 1-yn Co_yRu_nO_3 were prepared by sol-gel method and used as catalysts for NO direct decomposition. The catalysts were characterized by DTA-TG, XRD, IR and BET. XRD analysis reveals that the samples are In a pure perovskite phase at 550-650 ° C, and the catalyst structure keeps long else 2θ decrease, and the lattice parameters enhance when Ru is introduced. The characteristic peaks of samples are stronger during a temperature increase, and the particle size grows faster. IR analysis showing that the position and shape of adsorption peaks are almost the same among all samples, but with the Ru content increasing, 600 cm ~ -1 peak stretches to a high frequency and changes to disorder. The wave numbers move to low frequency when n = 0.05, yet it does not vary substantially when n> 0.05. The BET surface area testifies that particle sizes of all catalysts increase with temperature increasing.