Stabilization of 200‐Atom Platinum Nanoparticles by Organosilane Fragments

Abstract

Schutzhülle für Platin‐NPs: Platin‐Nanopartikel (Platin‐NPs) mit 2 nm Durchmesser, die etwa 200 Atome enthalten und mit n‐Octylsilylgruppen bedeckt sind (siehe Bild; Pt blau, Si rot, C grau, H türkis), entstehen bei der Zersetzung von [Pt(dba)2] (dba=Dibenzylidenaceton) in Gegenwart von n‐Octylsilan. Die NPs haben eine kuboktaedrische Struktur mit einer Kantenlänge von drei Atomen.

Hydrothermal Synthesis of Ultrasmall Pt Nanoparticles as Highly Active Electrocatalysts for Methanol Oxidation

“…Pt USNPs have also been synthesized with hydrophobic ligands. Uniform 2-nm-sized Pt USNPs were obtained by the decomposition of platinum dibenzylideneacetone under mild conditions in the presence of n-octylsilane [ 9 ]. Lim et al successfully synthesized Pt USNPs with an average size of 1.9 nm through the reaction of a Pt salt precursor with water, without the aid of any exotic reducing agents and organic capping molecules [ 10 ].…”

Solid State Morphology and Size Tuning of Nanostructured Platinum Using Macromolecular Complexes

“…the (111) , (200) , (200) and (311) planes [15]. Although several solution preparation of Pt° nanoparticles have been reported [14][15][16][17][18][19][20][21][22][23][24][25][26][27] no solid state methods for to prepare Pt° nanoparticles are available. The first way, solution methods, in spite of that to allow the size and morphology control, their incorporation to a solid state device could be not easy.…”

“…H 2 PtCl 4 or H 2 PtCl 6 ) in presence of a reducer such as an alcohol, NaBH 4 or H 2 and polymer stabilizers (also CO or other ligand) [16][17][18][19][20]. The use of Pt(acac) 2 or Pt(dba) 2 as a metallic forerunner with various reducers and stabilizers has also been reported [21][22][23][24].…”

σ-H–H, σ-C–H, and σ-Si–H Bond Activation Catalyzed by Metal Nanoparticles

“…238,239 Solid state 13 C NMR characterization demonstrated the formation of naked silicon atoms and alkylsilane ligands that were coordinated to the surface of the NPs, as a result of the activation of the σ-Si−H bond, followed by Si−C cleavage at the surface of the Ru NPs. In another work from Pelzer, Basset, and co-workers, 240 Pt NPs of 2 nm size were prepared by decomposition [Pt(dba) 2 ] under 3 bar of H 2 using n-octylsilane as ligand. After characterization of the NPs by infrared spectroscopy, transmission electron microscopy-energy dispersive x-ray spectroscopy (TEM-EDX), and X-ray photoelectron spectroscopy (XPS), the authors proposed that silicon alkyl species were coordinated to the surface.…”