在工业生产中NH_3氧化制HNO_3目前仍采用铂网催化剂。我们曾对稀土、过渡金属复合氧化物A_(1-x)A′_xBO_3型催化剂进行了一系列研究,其A,A′是碱土和稀土金属,B是Co,Fe,Mn,Ni等过渡金属元素。这类催化剂不仅活性高,HNO_3的单收率可达98％以上,而且具有良好的稳定性,但其寿命不如铂金. In industrial production of NH_3 oxidation of HNO_3 is still used platinum mesh catalyst. We have conducted a series of studies on rare earth, transition metal composite oxide A 1-x A’xBO 3 type catalysts, A, A ’are alkaline earth and rare earth metals, B is transition metals such as Co, Fe, Mn, Ni element. Such catalysts not only high activity, single yield of HNO 3 up to 98%, and has good stability, but its life expectancy than platinum.