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IMPROVED PRECIOUS METAL NANOPARTICLES

  • US 20190308155A1
  • Filed: 11/29/2017
  • Published: 10/10/2019
  • Est. Priority Date: 11/30/2016
  • Status: Active Application
First Claim
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1. A method for preparing a colloidal dispersion of precious metal nanoparticles free of organic adsorbates that have a molar weight above 100 g/mol, the method comprising:

  • a) providing at least one inorganic precursor for the precious metal nanoparticles, a mono-alcoholic solvent system comprising at least one mono-alcohol, and a base, wherein the at least one inorganic precursor comprises a precious metal selected from the group consisting of Pt, Pd, Ir, Ru, and combinations thereof, and the mono-alcohol of the mono-alcoholic solvent system is methanol, ethanol, propanol, or a combination thereof,b) mixing the at least one inorganic precursor, the mono-alcoholic solvent system and the base in the absence of polymers, ligands, capping agents and surfactants, thereby obtaining a reaction mixture, so as to reduce the at least one inorganic precursor with the mono-alcoholic solvent system, andc) obtaining the colloidal dispersion of precious metal nanoparticles free of organic adsorbates that have a molar weight above 100 g/mol.

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