Abstract: The catalytic properties of La_1-xCu_xMnO₃ perovskite type catalysts prepared by coprecipitation have been studied by means of XRD, TPR, TEM, SEM, EMPA, activity evaluation and etc. The results reveal that the activation energy of La_1-xCu_xMnO₃ catalysts decreases with the increase of x from 0 to 0.6 and the activity of the catalysts for COand CH₄ oxidation has a maximum point(for COoxidation x =0.4 and for CH₄ oxidation x =0.2). It is considered that the above behaviour is caused by the increase of lattice defects and chemical potential of lattice oxygen in catalysts with the increase of x.

Key words: perovskite-type catalyst, property, copper substitution, catalytic oxidation, catalytic activity