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采用溶胶-冷冻干燥法制备了La1-xBaxCo0.8Ni0.2O3(x=0~0.4)催化剂粉体。用X射线衍射(XRD)、比表面测定仪(BET)和扫描电子显微镜(SEM)等分析手段对催化剂的结构和形貌进行了表征,并考察了催化剂的最佳焙烧温度和催化活性。研究表明,催化剂的最佳焙烧温度为600℃。掺杂Ba2+后,催化剂以钙钛矿相和BaCO3相共存,不能形成单一的钙钛矿型结构。催化活性测试表明,当x=0.2时,催化剂对CO的催化活性最高(T90%=126℃)。
La1-xBaxCo0.8Ni0.2O3 (x = 0 ~ 0.4) catalyst powders were prepared by sol-freeze drying method. The structure and morphology of the catalyst were characterized by X-ray diffraction (XRD), surface area measurement (BET) and scanning electron microscopy (SEM). The optimum calcination temperature and catalytic activity of the catalyst were also investigated. The results show that the best catalyst calcination temperature is 600 ℃. After doping Ba2 +, the catalyst coexisted with perovskite phase and BaCO3 phase and could not form a single perovskite structure. Catalytic activity tests showed that when x = 0.2, the catalytic activity of CO is the highest (T90% = 126 ℃).