Catalyst for integrated removal of N2O and NOx and preparation method thereof

The invention relates to a catalyst for integrated removal of N2O and NOx and a preparation method thereof. According to the mass percentage, the finished product catalyst comprises 0.1%-5% of a noble metal, 3%-15% of a transition metal oxide, 0.5%-1% of an alkali metal hydroxide, and the balance an alumina carrier. Through cooperative use of the three components of the noble metal, the transition metal oxide and the alkali metal hydroxide, catalytic properties of the noble metal and the transition metal oxide are in synergistic utilization, at the same time, presence of the alkali metal hydroxide can cause adsorption blocking of ammonia on the noble metal surface, and then ammonia oxidation and denitrification activity of the noble metal are affected, so that the noble metal is inhibited from oxidation of ammonia through addition of the alkali metal hydroxide, catalytic denitrification activity of the noble metal is inhibited, and the purposes of relatively well catalytic decomposition of N2O and denitrification under conditions of low temperature (200 to 600 DEG C) are achieved.