以乙酸钴为钴源，采用溶剂辅助水热法制备Co₃O₄复合金属氧化物。利用XRD、SEM、BET、H₂-TPR、XPS、N₂O-TPSR和O₂-N₂O-TPSR等对催化剂的理化性质进行表征，在固定床微型反应器中评价催化剂催化分解N₂O活性，考察了晶化温度对催化剂催化分解N₂O活性的影响。结果表明，溶剂辅助水热法制备的Co₃O₄催化剂具有尖晶石结构，晶化温度影响催化剂形貌、氧化还原性能和催化分解N₂O活性。N₂O-TPSR和O₂-N₂O-TPSR测试结果表明，表面吸附氧在Co₃O₄催化分解N₂O中起重要作用。其中，晶化温度为160℃制备的Co₃O₄催化剂氧化还原性能好，催化分解N₂O温度低，在反应气体组成（体积分数）为0.68% N₂O、0.88% O₂、Ar为平衡气的（流量为80 mL/min）条件下，T₁₀和T₉₅分别为266℃和410℃。

Co₃O₄ composite metal oxide catalyst is prepared via the solvent assisted hydrothermal method using cobalt acetate as cobalt source.Its physicochemical properties are characterized by XRD,SEM,BET and H₂-TPR,XPS,N₂O-TPSR and O₂-N₂O-TPSR.The activity of the catalyst in catalytic decomposition of N₂O is evaluated in a fixed-bed micro-reactor and the effects of crystallization temperature on its activity in catalytic decomposition of N₂O are investigated.Evaluation results show that Co₃O₄ catalysts prepared via solvent assisted hydrothermal method have a spinel structure and the crystallization temperature does affect catalysts' morphology,redox performance and activity in catalytic decomposition of N₂O.The result by N₂O-TPSR and O₂-N₂O-TPSR shows that the oxygen adsorbed on the catalyst surface plays an important role in the catalytic decomposition of N₂O.The redox performance of Co₃O₄ catalyst prepared at a crystallization temperature of 160℃ is good,over which the catalytic decomposition of N₂O can be performed under a low temperature.The T₁₀ and T₉₅ are 266℃ and 410℃,respectively under the conditions that reaction gas consists (volume fraction) 0.68% of N₂O,0.88% of O₂ and Ar as equilibrium gas with a flow rate of 80 mL·min^-1.

孙巾茹(1994-),女,硕士研究生,主要研究方向为环境工程,fjcsjr@163.com