NOBLE METAL COLLOID PARTICLES AND NOBLE METAL COLLOID SOLUTION, AND CATALYST FOR OXYGEN REDUCTION
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United States of America Patent
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Issued Date -
Oct 24, 2013
app pub date -
Dec 21, 2011
filing date -
Dec 28, 2010
priority date (Note) -
Abandoned
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Abstract
The noble metal colloidal particles of the present invention are noble metal colloidal particles each including: a Pd colloidal particle; and Pt supported on the surface of the Pd colloidal particle. The noble metal colloidal particles are substantially free from a protective colloid. The Pd colloidal particles have an average particle diameter of 7 to 20 nm. The amount of the Pt supported on the surface of the Pd colloidal particle is 0.05 to 0.65 atomic layer thick, when the amount is expressed as the number of atomic layers of the Pt. The noble metal colloidal solution of the present invention can be obtained by dispersing these noble metal colloidal particles of the present invention in a solvent.
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