Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation

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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){sub 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{sub 2}) showed an activity dependence on the Ru NP size. The CO oxidation activity increases with NP size, and the ... continued below

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Joo, Sang Hoon; Park, Jeong Y.; Renzas, J. Russell; Butcher, Derek R.; Huang, Wenyu & Somorjai, Gabor A. April 4, 2010.

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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){sub 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{sub 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.

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  • Journal Name: Nano Letters; Journal Volume: 10; Journal Issue: 7

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  • Report No.: LBNL-4430E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1021/nl101700j | External Link
  • Office of Scientific & Technical Information Report Number: 1012367
  • Archival Resource Key: ark:/67531/metadc833094

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  • April 4, 2010

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  • May 19, 2016, 3:16 p.m.

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  • July 28, 2016, 12:57 p.m.

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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. (digital.library.unt.edu/ark:/67531/metadc833094/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.