Nanomaterial template Pd nanocatalysts

Dendritic polymers, known as the "fourth generation of new polymer materials", have attracted wide attention from the scientific community and industry. The novel features of the material are: highly branched molecular structure, a large number of surface functional groups, the presence of cavities within the molecule, the monodisperse molecular weight distribution, and the molecular size of nanometer. The structural characteristics of dendritic molecules make them have unique properties: excellent dissolution and dispersion properties, low melt viscosity and solution viscosity, not easy to crystallize, easy to form films, showing unparalleled nano characteristics.

Dendritic polymers have not only internal cavities but also abundant surface functional groups, which is a good template for preparing nanomaterials. By controlling the size of dendrimer or selecting different end groups, nanocatalysts with uniform distribution, stable size and different catalytic properties can be prepared.

Product performance

Dendritic polymer has the following excellent properties:

• The size of nanocatalyzer can be accurately controlled by using its cavity spherical structure, and the size of the prepared nanocatalyzer particles is uniform and stable;

• By selecting different brands of dendrimer and controlling the active center of nanocatalyzer on the surface of dendrimer, the addition reaction of halogenated hydrocarbon with olefin, the hydrogenation reaction of acetophenone and the alkenylation reaction of olefin can be catalyzed;

• By selecting different brands of dendrimer and controlling the active center of nanocatalysts inside the dendrimer, it can catalyze alkene addition reaction, stille reaction, electrochemical catalytic reduction reaction of oxygen, etc.

Basic physical properties

Dendrimer was used as template to prepare Pd nanocatalysts

Pd nanocatalysts were prepared by chemical reduction using this series of dendritic polymer products as the template. As shown in Figure 1, the prepared CYD-NK1107 (Pd40) metal nanoparticles with a size of 1.3±0.3nm could remain dispersed for a long time without agglomeration.

Pd nanocatalysts prepared by dendrimer as templates - Catalytic hydrogenation performance

CYD-K424 (Pd40), G6.0-OH (Pd40) and G8.0-OH (Pd40) catalyzed hydrogenation of propylene alcohol and isopropylacrylamide, respectively. As shown in Figure 2, the nanocatalyzer CYD-NK1107 (Pd40) showed excellent catalytic performance, especially for the catalytic hydrogenation of branched isopropylacrylamide.

Applicable brands: CYD-D202, CYD-D418, CYD-K424, CYD-K208, etc.