通过浸渍法制备了8%Mn/TiO_2-PILC以及稀土元素R(Ce,La)改性的8%Mn-2%R/TiO_2-PILC催化剂,考察了所制备催化剂的低温NH_3-SCR活性和抗水抗硫特性。结果发现,Ce的添加改变了催化剂的物相以及氧化还原特性,从而改变了催化剂的NO去除活性;稀土元素的添加可以减缓催化剂的失活速率,但是抗水抗硫特性仍然不理想。 8% Mn-2% R / TiO_2-PILC catalyst modified by 8% Mn / TiO_2-PILC and rare earth element R (Ce, La) was prepared by impregnation method. The catalytic activity of low temperature NH_3- Water resistance to sulfur. It was found that the addition of Ce changed the phase and redox properties of the catalyst, thus changing the NO removal activity of the catalyst. The addition of rare earth elements can slow down the deactivation rate of the catalyst, but the water and sulfur resistance characteristics are still unsatisfactory.