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Wang, Y., et al. (2000). "Preparation of Tractable Platinum, Rhodium, and Ruthenium Nanoclusters with Small Particle Size in Organic Media." Chemistry of Materials 12(6): 1622-1627.

Preparation of ¡°Unprotected¡± Platinum Nanoclusters.
All operations were carried out under inert atmosphere (Ar
or N2). In a typical preparation, a glycol solution of NaOH (50
mL, 0.5 M) was added into a glycol solution of H2PtCl6a6H2O
(1.0 g, 1.93 mmol in 50 mL) with stirring to obtain a
transparent yellow platinum hydroxide or oxide colloidal
solution which was then heated at 160 ¡ãC for 3 h, with an Ar
flow passing through the reaction system to take away water
and organic byproducts. A transparent dark-brown homogeneous
colloidal solution of the Pt metal nanocluster (Pt: 3.76
g/L glycol, 19.3 mmol/L) was obtained without any precipitate.
The obtained Pt nanocluster solution is very stable, no
precipitate was observed after standing for several months.
2013
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