Study on Catalytic oxidation of Glucose over the Pd /C Catalysts Modified by Transition Metals

The activities of Pd/C catalysts modified by different transition metals such as Fe, Co and Ni were evaluated in a batch reactor, and Pd/C and PdCo/C catalysts were characterized by BET and XPS The results show the PdCo/C catalyst exhibits the high glucose conversion activity of 92 %, with 94 % selectivity to glucose acid, after the reaction running 3 h The BET measurement reveals that the increased distribution of the larger pore size of PdCo/C, resulting from the addition of Co and the sequent catalyst calcinations, leads to the decrease of the feedstocks transmit resistance The XPS characterization indicates that there are higher concentration and dispersion of palladium species on the surface of CoPd/C in comparison with Pd/C This suggests that the Pd species on the surface of CoPd/C catalysts can be reduced easily Thus, PdCo/C catalyst exhibits better catalytic activity for glucose catalytic oxidation than Pd/C catalyst