Precious metal nanoparticles
AssigneeHeraeus Deutschland GmbH & Co. KG
InventorsSebastian Kunz, Matthias Arenz, Jonathan Quinson, Laura Kacenauskaite
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Abstract
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 colloidal dispersion of the precious metal nanoparticles obtained by the method according to the invention, solid and re-dispersed precious metal nanoparticles and products comprising colloidally dispersed or solid precious metal nanoparticles.
Claims10
A method for preparing a colloidal dispersion of precious metal nanoparticles, 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, to obtain a reaction mixture, thereby fully reducing the at least one inorganic precursor with the mono-alcoholic solvent system in a one-step process, and
- c) obtaining the colloidal dispersion of precious metal nanoparticles via the one-step process, the precious metal nanoparticles being free of organic adsorbates having a molar weight above 100 g/mol.
A method for preparing a colloidal dispersion of precious metal nanoparticles, the method comprising:
- combining, in the absence of polymers, ligands, capping agents, and surfactants, an inorganic precursor comprising a precious metal selected from the group consisting of Pt, Pd, Ir, Ru, and combinations thereof, a mono-alcoholic solvent system comprising a mono-alcohol selected from the group consisting of methanol, ethanol, propanol, and combinations thereof, and a base to form a reaction mixture in a one-step process;
- fully reducing the inorganic precursor in the reaction mixture;
- and
- forming via the one-step process the colloidal dispersion of precious metal nanoparticles comprising precious metal nanoparticles reduced from the mono-alcoholic solvent system and being free of organic adsorbates having a molar weight above 100 g/mol.
Dependencies are inferred from the claim text.