Generation of size-controlled palladium(0) and gold(0) nanoclusters inside the nanoporous domains of gel-type functional resins

Functional Resins as Hydrophilic Supports for Nanoclustered Pd(0) and Pd(0)‐Au(0) Catalysts Designed for the Direct Synthesis of Hydrogen Peroxide

“…Thus, the resin undergoes facile metallation with Pd(OAc) 2 in acetonitrile and with HAuCl 4 also in acetonitrile to give Pd(II)/* P -SMe and Au(III)/* P -SMe macrocomplexes. [16] A quite similar reaction under similar conditions leads to the Pd(II)-Au(III)/* P -SMe macrocomplex. Treatment of the three macrocomplexes with excess NaBH 4 in water leads to the very rapid (seconds) formation of Pd(0)/* P -SMe black, Au(0)/* P -SMe, burgundy red, Pd(0)-Au(0)/* P -SMe, black, [16] tentatively considered to be a nanoalloy.…”

“…We have applied our expertise to obtain potential catalysts related both to Hutching and Fierros approaches, i.e., based on i) nanometer-sized, expectedly (see below) nanoalloyed Au(0) and Pd(0) supported on gel-type resins [16] and ii) designed gel-type sulfonic resins bearing either "Pd 2 þ " ions or Pd(0) nanoclusters to be possibly employed in water and featured by good stability and consequently reusability.…”

“…For sake of further simplification, we code occasionally MTEMA-DMAA-MBA 10 -4 also as * PSMe and SEMA-DMAA-DVB also as * P -SO 3 À H þ . MTEMA-DMAA-MBA 10 -4 is a macromolecular ligand chemically and structurally very close to MTE-MA-DMAA-MBA 4 -4 (4% mol -92% mol -4% mol), which resin was thoroughly investigated by us both as a ligand towards Pd(II) and Au(III) and as a macromolecular "mold" for the generation of size-controlled Pd(0) and Au(0) nanoclusters, [15,16] Figure 1.…”

Synthesis and catalytic activity of metal nanoclusters inside functional resins: an endeavour lasting 15 years

“…Another very convincing example of this behaviour is reported in Burato et al (2005). In the extensive world of M 0 /S catalytic materials, the problem of controlling the size of metal nanoclusters has been faced by means of a variety of synthetic routes (Bönnemann & Nagabhushana 2008).…”

Gel-type ion exchange resin stabilized Pd-Bi nanoparticles for the glycerol oxidation in liquid phase

“…Over the last years, polymeric materials having varied chemical structure of the backbone, cross-linking and functional groups, different morphology, porosity and macroscopic dimension [41][42][43][44][45] could efficiently immobilized the monometallic or the bimetallic nanoclusters, thus provide a solution to the problem with reusability without aggregation of nanoclusters and leaching of metals [46][47][48]. Despite the number of investigation in this field, there are almost missing data on the use of commercial ion exchange resin as a support for the catalytic oxidation of glycerol.…”