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用Na2CO3·10H2O和NaOH混合碱为沉淀剂制得了钙钛矿型结构的La1-xAxCoO3(A:Sr,Ba,Dy,Y;X:0,0.1,0.2)复合氧化物,考察了焙烧温度对催化剂结构和催化活性的影响,发现A位取代后可使催化剂对CH4的催化氧化活性提高;通过与柠檬酸络合法制得的La1-xAxCoO3复合氧化物比较,证明制备方法对催化剂的催化活性也有很大的影响.
A composite oxide of La1-xAxCoO3 (A: Sr, Ba, Dy, Y; X: 0,0.1,0.2) with perovskite structure was prepared by using a mixture of Na2CO3 · 10H2O and NaOH as the precipitant. The effects of calcination temperature Catalyst structure and catalytic activity. It was found that the catalytic activity of the catalyst for CH4 was improved after the substitution of A site. Compared with the La1-xAxCoO3 composite oxide prepared by citric acid complexation method, the catalytic activity of the preparation method for the catalyst was also proved Great impact.