Selective oxidation of propylene glycol is studied over silica-supported FeMoO catalysts with different Mo/Fe molar ratio. The catalysts are synthesized by wetness impregnation method and characterized by XRD, UV–vis, Raman spectroscopy, TPR and DFT methods. The catalytic properties are tested under gas phase conditions at 350 °C. The selectivity towards methylglyoxal formation is shown to be determined by the Mo/Fe molar ratio. The 55% selectivity towards methylglyoxal is achieved at Mo/Fe molar ratio of 3:1 through OH activation and CH bond scission route. CC bond cleavage route results in predominant formaldehyde formation at the Mo/Fe molar ratio of 1:2.

在具有不同Mo / Fe摩尔比的二氧化硅负载的Fe Mo O催化剂上研究了丙二醇的选择性氧化。该催化剂是通过湿法浸渍法合成的，并通过XRD，UV-vis，拉曼光谱，TPR和DFT方法进行了表征。催化性能在350°C的气相条件下进行测试。显示出对甲基乙二醛形成的选择性由Mo / Fe摩尔比确定。通过O H活化和C H键断裂途径，在Mo / Fe摩尔比为3：1时，对甲基乙二醛的选择性达到55％。C C键断裂路径导致Mo / Fe摩尔比为1：2时主要形成甲醛。