Co-Pd bimetallic catalysts immobilized with four kinds of resins with different specific areas were prepared by means of the solvated metal atom impregnation (SMAI) method. The results of the XRD and the magnetic meas...Co-Pd bimetallic catalysts immobilized with four kinds of resins with different specific areas were prepared by means of the solvated metal atom impregnation (SMAI) method. The results of the XRD and the magnetic measurement showed that as the specific area of the resin increased, the particle sizes of Co and Pd on the catalysts with the same metal content decreased, so the catalytic activity of the catalysts for the hydrogenation of diacetone alcohol as well as the reduction of oxygen on the fuel cell electrode increased. Below 140 , the conversion of diacetone alcohol increased as the reaction temperature increased, and above 140 , the conversion decreased because of the rupture of the resin.展开更多
Several kinds of snake-cage resins containing both carboxylic and quaternary ammonium groups were synthesized from cage resin with 7 % crosslinking. The influence of the crosslinking degree on retardation capacity and...Several kinds of snake-cage resins containing both carboxylic and quaternary ammonium groups were synthesized from cage resin with 7 % crosslinking. The influence of the crosslinking degree on retardation capacity and separation ability has been studied. These resins were used to separate the water-soluble nonvolatile impurities (NVI) from the spinning SQlvent of polyacrylonitrile-sodium thiocyanate solution. Satisfactory results were achieved.展开更多
基金National Natural Science Foundation of China and Natural Science Fundation of Tianjin.
文摘Co-Pd bimetallic catalysts immobilized with four kinds of resins with different specific areas were prepared by means of the solvated metal atom impregnation (SMAI) method. The results of the XRD and the magnetic measurement showed that as the specific area of the resin increased, the particle sizes of Co and Pd on the catalysts with the same metal content decreased, so the catalytic activity of the catalysts for the hydrogenation of diacetone alcohol as well as the reduction of oxygen on the fuel cell electrode increased. Below 140 , the conversion of diacetone alcohol increased as the reaction temperature increased, and above 140 , the conversion decreased because of the rupture of the resin.
文摘Several kinds of snake-cage resins containing both carboxylic and quaternary ammonium groups were synthesized from cage resin with 7 % crosslinking. The influence of the crosslinking degree on retardation capacity and separation ability has been studied. These resins were used to separate the water-soluble nonvolatile impurities (NVI) from the spinning SQlvent of polyacrylonitrile-sodium thiocyanate solution. Satisfactory results were achieved.
