Supported precious metal catalysts via hydrothermal deposition
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United States of America Patent
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May 28, 2013
Grant Date -
Oct 13, 2011
app pub date -
Apr 13, 2010
filing date -
Apr 13, 2010
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Abstract
A process for making a catalyst having precious metal nanoparticles deposited on a support includes first providing an aqueous dispersion of support particles. A pre-treatment slurry is prepared by mixing the aqueous dispersion of support particles with a water-soluble precious metal precursor and a reducing agent. The pre-treatment slurry is hydrothermally treated at a temperature in the range of from about 40° C. to about 220° C. for a time sufficient to deposit precious metal nanoparticles on the surface of the support particles, the precious metal nanoparticles having an average particle size less about 50 nm.
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