Abstract：Different amine-promoted Pt/CNTs catalysts were prepared and then tested for selective oxidation of glycerol (GLY) under base-free conditions to probe the promoter effects. The introduction of diethylamine (DEA) and diethanol amine (DEOA) appears to enhance both the initial reaction rate of glycerol oxidation and the selectivity to glyceraldehyde (GLYD), which may be due to the higher binding energy of Pt 4f and stronger basic sites. However, excessive amount of DEOA leads to the blocking of Pt active sites and thus a lower initial reaction rate. Moreover, there exists optimal values for reaction temperature and GLY/Pt molar ratio. The insights revealed here could guide the catalyst rational design and optimization for the selective base-free oxidation of glycerol.
