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Title: Method for low temperature preparation of a noble metal alloy

Abstract

A method for producing fine, essentially contamination free, noble metal alloys is disclosed. The alloys comprise particles in a size range of 5 to 500 nm. The method comprises 1. A method for preparing a noble metal alloy at low temperature, the method comprising the steps of forming solution of organometallic compounds by dissolving the compounds into a quantity of a compatible solvent medium capable of solvating the organometallic, mixing a portion of each solution to provide a desired molarity ratio of ions in the mixed solution, adding a support material, rapidly quenching droplets of the mixed solution to initiate a solute-solvent phase separation as the solvent freezes, removing said liquid cryogen, collecting and freezing drying the frozen droplets to produce a dry powder, and finally reducing the powder to a metal by flowing dry hydrogen over the powder while warming the powder to a temperature of about 150.degree. C.

Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
874242
Patent Number(s):
6348431
Assignee:
Sandia National Laboratories (Livermore, CA) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; temperature; preparation; noble; metal; alloy; producing; fine; essentially; contamination; free; alloys; disclosed; particles; size; range; 500; nm; preparing; comprising; steps; forming; solution; organometallic; compounds; dissolving; quantity; compatible; solvent; medium; capable; solvating; mixing; portion; provide; molarity; ratio; mixed; adding; support; material; rapidly; quenching; droplets; initiate; solute-solvent; phase; separation; freezes; removing; liquid; cryogen; collecting; freezing; drying; frozen; produce; dry; powder; finally; reducing; flowing; hydrogen; warming; 150degree; noble metal; metal alloy; organometallic compound; /502/

Citation Formats

Even, Jr., William R. Method for low temperature preparation of a noble metal alloy. United States: N. p., 2002. Web.
Even, Jr., William R. Method for low temperature preparation of a noble metal alloy. United States.
Even, Jr., William R. Tue . "Method for low temperature preparation of a noble metal alloy". United States. https://www.osti.gov/servlets/purl/874242.
@article{osti_874242,
title = {Method for low temperature preparation of a noble metal alloy},
author = {Even, Jr., William R.},
abstractNote = {A method for producing fine, essentially contamination free, noble metal alloys is disclosed. The alloys comprise particles in a size range of 5 to 500 nm. The method comprises 1. A method for preparing a noble metal alloy at low temperature, the method comprising the steps of forming solution of organometallic compounds by dissolving the compounds into a quantity of a compatible solvent medium capable of solvating the organometallic, mixing a portion of each solution to provide a desired molarity ratio of ions in the mixed solution, adding a support material, rapidly quenching droplets of the mixed solution to initiate a solute-solvent phase separation as the solvent freezes, removing said liquid cryogen, collecting and freezing drying the frozen droplets to produce a dry powder, and finally reducing the powder to a metal by flowing dry hydrogen over the powder while warming the powder to a temperature of about 150.degree. C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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