Activity of Co3O modified by alkali metal K and catalyst for decomposition of NZO. 5% NZO, 2% 02, 2. 5% HZO has been reported. The temperature of complete decomposition of NZO is about 3800°C (Asano Nagaakira Junhong, Daxi Qian Hui, wamoto Xinzhi, Yangu Kangshi, official history of Ministry of Industry and Information Technology. Potassium-doped Co3O is a catalyst for direct decomposition of NZO. Applied Catalysis B: Environment, 2008, 78: 242-249).
Patent document cN 1440309A describes a catalyst for decomposing NZo in gas, which contains 0. 1- 10 mol% of Co3xMxO, where m is iron and aluminum, and x-0 12, the catalyst and NZO are in contact reaction at 500- 1000℃. The patent example shows that the complete decomposition temperature of Ji O on CoO, /CeOZ or CoZAIO CEOZ catalysts is above 800℃.