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Gold nanoparticles were deposited on two kinds of solid acids, i.e., amorphous SiO2–Al2O3 and cation-exchange resin Amberlyst-15; the resultant materials exhibited high activity as metal–acid bifunctional catalysts. SiO2–Al2O3 was impregnated with a chloride-free alkaline Au(III) solution containing Na+ and then dried. After calcination at 623K, gold nanoparticles with diameters of 4.2nm (measured...
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