Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation Page: 2 of 16
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ABSTRACT
Carbon monoxide oxidation over ruthenium catalysts have shown an intriguing catalytic behavior, thus
has been a subject of intense interests. Here we report a particle size effect in CO oxidation over Ru
nanoparticle (NP) catalysts. Uniform Ru NPs with a tunable particle size from 2 to 6 nm were
synthesized by polyol reduction of Ru(acac)3 precursor in the presence of poly(vinylpyrrolidone)
stabilizer. The catalytic activity of CO oxidation over model catalysts based on size-controlled Ru NPs
under oxidizing reaction conditions (40 Torr CO and 100 Torr 02) was found to show a dependence of
activity on the Ru NP size; the CO oxidation activity increases with the Ru size, and 6 nm Ru NP
catalyst shows 8-fold higher activity than 2 nm catalyst. The results gained from this study would
provide the scientific basis for the future design of Ru-based oxidation catalysts.
KEYWORDS
ruthenium; nanoparticles; model nanocatalyst; CO Oxidation; size effect; structure sensitivity
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Joo, Sang Hoon; Park, Jeong Y.; Renzas, J. Russell; Butcher, Derek R.; Huang, Wenyu & Somorjai, Gabor A. Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation, article, April 4, 2010; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc833094/m1/2/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.