Influence of Carrier Structure on Performance of Pt/SDB Hydrophobic Catalysts
In order to study the influence of SDB carrier structure on catalyst performance,three SDB carriers with different structures were selected,and Pt/SDB hydrophobic catalysts were prepared by equal volume impregnation and high temperature hydrogen reduction with chloroplatinic acid as precursor,and their catalytic activity in water-hydrogen isotope exchange reaction was studied.The microscopic appearance and pore structures of the carriers were analyzed by SEM,IR and MI(Mercury injection).And TEM,ICP-MS and XRD were used to test the distribution and crystallization of Pt on hydrophobic catalysts.The catalysts activities were tested by gas-liquid hydrogen isotopes catalytic exchange reaction.The results demonstrated that there was obvious competitive adsorption effect of precursor chloroplatinic acid due to microstructure difference,which also affected the Pt crystalline state,particle size and aggregation performance on the catalysts.The carrier B with more open pores on the surface and 159.63 nm average pore diameter revealed better catalytic performance.
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