Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation

作者：Joo Sang Hoon; Park Jeong Y^*; Renzas J Russell; Butcher Derek R; Huang Wenyu; Somorjai Gabor A

来源：Nano Letters, 2010, 10(7): 2709-2713.

DOI：10.1021/nl101700j

• Ruthenium
• nanoparticles
• model nanocatalyst
• CO oxidation
• size effect

Carbon monoxide oxidation over ruthenium catalysts has shown an unusual catalytic behavior Here we report a particle size effect on CO oxidation over Ru nanoparticle (NP) catalysts Uniform Ru NPs with a tunable particle size from 2 to 6 nm were synthesized by a polyol reduction of Ru(acac)(3) precursor in the presence of poly(vinylpyrrolidone) stabilizer The measurement of catalytic activity of CO oxidation over two-dimensional Ru NPs arrays under oxidizing reaction conditions (40 Torr CO and 100 Torr O-2) showed an activity dependence on the Ru NP size The CO oxidation activity increases with NP size, and the 6 nm Ru NP catalyst shows 8-fold higher activity than the 2 nm catalysts The results gained from this study will provide the scientific basis for future design of Ru-based oxidation catalysts

• 出版日期2010-7