Stable silver nanoparticles are obtained reproducibly by hydrogen reduction of different inorganic precursors from (AgX)-X-1 salts (X = BF4, PF6, OTf) dissolved in the ionic liquids BMim(+)BF(4)(-), BMim(+)PF(6)(-), [BMim(+) = n-butylmethylimidazolium, BMim(+)OTf(-). or BtMA(+)NTf(2) BtMA(+) = n-butyltrimethylammonium, NTf2 = N(O2SCF3)(2), and OTf = O3SCF3] in the presence of n-butylimidazole (Bim) as the scavenger for the HX acid byproduct and with a narrow size distribution in the diameter range of 2.8-26.1 nm, which increases linearly with the molecular volume of the ionic liquid anion (transmission electron microscopy characterization).
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