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Two AlFe-PILC catalysts were prepared with different OH/metal ratio and applied in nitrous oxide (N2O) decomposition reactions. The 100% conversion of N2O with NH3 into N2 and H2O was achieved below 500oC with both applied catalysts. However, the activity of catalysts in direct conversion of N2O into N2 and O2 did not exceed 40 % below 500oC. In this reaction the activity of AlFe-PILC catalyst synthesized at higher OH/metal ratio (4) is higher compared to the activity of AlFe-PILC catalyst with OH/metal ratio (2). Free FeO·Fe2O3particles were registered in the AlFe-PILC catalyst with higher OH/metal ratio (4).