A series of Ni-Co catalysts were prepared in this study. Experimental results showed that supported Ni-Co catalyst had the ability of decomposition of N2O, and its activity was increased with increasing content of the catalytic components on the support. Study indicated that a little addition of platinum catalytic component to the Ni-Co catalyst would benefit on improving its activity, and it was obvious under lower reaction temperature. Experimental results showed that the Pt-Ni-Co catalyst had good stability. XRD, SEM, TG and ICP characterization also showed that the prepared catalyst had a good stable structure before and after reaction. (C) 2009 Elsevier Ltd. All rights reserved.